- Directeur Master Génie des Procédés
- Membre de la "Société Française de Génie des Procédés",
- Membre de l'association "Innovation Fluides Supercritiques" et
de "l'Institut Carnot Star"
- Membre de l'association des anciens élèves de l'ENSIC
Activités
Développement des procédés en eau sous pression (sub et supercritique) :
extraction en eau chaude,
oxydation en voie humide,
oxydation hydrothermale
Publications scientifiques au M2P2
2024
Emilie Gout, Mathias Monnot, Olivier Boutin, Pierre Vanloot, Philippe Moulin. Prospects of industrial membrane concentrates: treatment of landfill leachates by coupling reverse osmosis and wet air oxidation. Environmental Science and Pollution Research, 2024, ⟨10.1007/s11356-024-32461-4⟩. ⟨hal-04593773⟩ Plus de détails...
Emilie Gout, Mathias Monnot, Olivier Boutin, Pierre Vanloot, Philippe Moulin. Prospects of industrial membrane concentrates: treatment of landfill leachates by coupling reverse osmosis and wet air oxidation. Environmental Science and Pollution Research, 2024, ⟨10.1007/s11356-024-32461-4⟩. ⟨hal-04593773⟩
Journal: Environmental Science and Pollution Research
Emilie Gout, Fatimatou Toure Lo, Mathias Monnot, Olivier Boutin, Pierre Vanloot, et al.. Coupling membrane processes with wet air oxidation for the remediation of industrial effluents. Chemical Engineering Journal, 2023, 472, pp.144937. ⟨10.1016/j.cej.2023.144937⟩. ⟨hal-04202142⟩ Plus de détails...
Emilie Gout, Fatimatou Toure Lo, Mathias Monnot, Olivier Boutin, Pierre Vanloot, et al.. Coupling membrane processes with wet air oxidation for the remediation of industrial effluents. Chemical Engineering Journal, 2023, 472, pp.144937. ⟨10.1016/j.cej.2023.144937⟩. ⟨hal-04202142⟩
Emilie Gout, Fatimatou Toure Lo, Mathias Monnot, Olivier Boutin, Pierre Vanloot, et al.. Coupling membrane processes with wet air oxidation for the remediation of industrial effluents. Chemical Engineering Journal, 2023, 472, pp.144937. ⟨10.1016/j.cej.2023.144937⟩. ⟨hal-04543342⟩ Plus de détails...
Membrane processes (ultrafiltration, membrane bioreactor, reverse osmosis) are relevant for the remediation of wastewater as they generate large volumes of high-quality permeate. However, the remaining concentrates are highly polluted and require further treatment. Membrane concentrates are sufficiently concentrated to undergo a highly efficient wet air oxidation treatment to degrade refractory molecules. Wet air oxidation was performed on five industrial membrane concentrates with varying organic pollutants: bilge wastewater, landfill leachates, a complex industrial effluent, pharmaceutical sludge and dairy wastewater. The results showed three categories: (i) a low effect of the anoxic heating period and significant effect of oxidation duration, (ii) a significant effect of both the anoxic heating period and duration and (iii) an outstanding effect of the anoxic heating period and low effect of oxidation duration. The best removals were achieved at 300 °C, with total organic carbon removals between 75 and 98% and chemical oxygen demand removals between 82 and 99%, along with complete removal of fluorescent footprints. The coupling of membrane processes and wet air oxidation was proven to be robust and flexible for a wide variety of membrane processes and pollutants. A mass balance on the treatment path, including membrane permeate and wet air oxidation outlet, was calculated to assess discharge feasibility. This research demonstrates the potential of the hybrid process for effectively treating membrane concentrates and generating a safer outlet.
Emilie Gout, Fatimatou Toure Lo, Mathias Monnot, Olivier Boutin, Pierre Vanloot, et al.. Coupling membrane processes with wet air oxidation for the remediation of industrial effluents. Chemical Engineering Journal, 2023, 472, pp.144937. ⟨10.1016/j.cej.2023.144937⟩. ⟨hal-04543342⟩
Gautier Hypolite, Olivier Boutin, Sandrine Del Sole, Jean-François Cloarec, Jean-Henry Ferrasse. Evaluation of a water network’s energy potential in dynamic operation. Energy, 2023, 271, pp.127066. ⟨10.1016/j.energy.2023.127066⟩. ⟨hal-04504325⟩ Plus de détails...
To address the challenges of the energy transition, reducing consumption and optimizing energy production is crucial for all industrial sectors. In the future, water issues will be as important as energy issues, making the optimization of water supply systems critical. The water sector represents large energy consumption for pumping and heating. In regards to this consumption, water systems have a great potential for energy recovery through hydroelectric production or thermal energy recovery. This article aims to quantify the energy potential of water supply systems, which has not been well understood until now. The energy potential of these systems encompasses hydropower recovery and thermal potential, including heat recovery and cold recovery. For that, a method is developed to estimate this potential, including the recoverable power, its location, and its temporal variation. The method can be used for hydroelectricity production, as well as for heat and cold recovery. For a whole year, the results indicate a hydraulic potential of 15 MWh.km−1.year−1, and respectively 1650 MWh.km−1 .year−1 for heat recovery and 766 MWh.km−1.year−1 for cold recovery.
Gautier Hypolite, Olivier Boutin, Sandrine Del Sole, Jean-François Cloarec, Jean-Henry Ferrasse. Evaluation of a water network’s energy potential in dynamic operation. Energy, 2023, 271, pp.127066. ⟨10.1016/j.energy.2023.127066⟩. ⟨hal-04504325⟩
Antonello Tangredi, Cristian Barca, Jean-Henry Ferrasse, Olivier Boutin. Effect of process parameters on phosphorus conversion pathways during hydrothermal treatment of sewage sludge: A review. Chemical Engineering Journal, 2023, 463, pp.142342. ⟨10.1016/j.cej.2023.142342⟩. ⟨hal-04303018⟩ Plus de détails...
Sewage sludge represents a renewable source of organic carbon and nutrients such as nitrogen (N), potassium (K), and phosphorus (P) that can be valorised through the recovery of energy carriers (e.g. biofuels) and fertilizers (N, K, and P precipitates). This review analyses>60 recent studies that have investigated P recovery potential from sewage sludge by hydrothermal processes. The effect of process parameters such as temperature, residence time, pressure, solid-to-liquid ratio, and addition of additives on P conversion pathways has been investigated by a critical discussion of the results published in the literature. Results show that temperature is the most influential parameter for P speciation and repartition: the increase in temperature appears to promote the increase in solid P recovery yield, the mineralization of organic P, and the conversion of non-apatitic P into apatitic P. The increase in reaction time has similar effects as temperature, but to a lesser extent. Solid P recovery yield and apatitic P fraction can be enhanced by increasing the medium alkalinity and by adding Ca-containing reactants. Non-apatitic P fraction can be increased by lower medium alkalinity, and by the addition of Fe-and Alcontaining reactants. The results of this review provide to researchers and practitioners in the field of sewage sludge management key elements for the best operation of hydrothermal reactors to improve the recovery of P and biofuels. Finally, some new research perspectives and technical challenges are proposed to improve the knowledge and the scaling up of the technology.
Antonello Tangredi, Cristian Barca, Jean-Henry Ferrasse, Olivier Boutin. Effect of process parameters on phosphorus conversion pathways during hydrothermal treatment of sewage sludge: A review. Chemical Engineering Journal, 2023, 463, pp.142342. ⟨10.1016/j.cej.2023.142342⟩. ⟨hal-04303018⟩
Gautier Hypolite, Jean-Henry Ferrasse, Olivier Boutin, Sandrine del Sole, Jean-François Cloarec. Dynamic modeling of water temperature and flow in large water system. Applied Thermal Engineering, 2021, 196, pp.117261. ⟨10.1016/j.applthermaleng.2021.117261⟩. ⟨hal-03597512⟩ Plus de détails...
Thermal energy counts for a large part of the total energy consumption. To reduce fossil fuel consumption for heat and cold generation, different low temperature heat sources have been considered. Water networks have been considered as a large amount of water flow through it. To measure the thermal potential of the system, this paper provides a method in unsteady state to determine water temperature and flow in large water systems made of buried pipes. The model has been applied to a raw water supply system made up of 5000 km of piping and carrying 200 million m3 annually situated in the south of France. Water temperature is calculated considering heat exchange and the spatial specificities of the network (diameter of the pipes, depth, type of soil ...). Soil and water temperature measurements have been made to validate the model values. The model can predict water flow and temperature according to time with good accuracy: maximal error of 10% on the flow is obtained, the root mean square error on the calculated temperature is 0.84 circle C, and the correlation coefficient between the calculated and the measured temperature values is 0.98. The impact of adding several heat (or cold) injections in the system has been evaluated with the model. After a 2 MW heat exchange, the water temperature is increased by at least 1circC for 10 km downstream the exchange.
Gautier Hypolite, Jean-Henry Ferrasse, Olivier Boutin, Sandrine del Sole, Jean-François Cloarec. Dynamic modeling of water temperature and flow in large water system. Applied Thermal Engineering, 2021, 196, pp.117261. ⟨10.1016/j.applthermaleng.2021.117261⟩. ⟨hal-03597512⟩
Clément Leonard, Jean-Henry Ferrasse, Sébastien Lefevre, Alain Viand, Olivier Boutin. Bubble rising velocity and bubble size distribution in columns at high pressure and temperature: From lab scale experiments to design parameters. Chemical Engineering Research and Design, 2021, 173, pp.108-118. ⟨10.1016/j.cherd.2021.07.003⟩. ⟨hal-03515133⟩ Plus de détails...
The design of bubble column for industrial applications is well known under near ambient pressure and temperature conditions, contrary to high pressure and temperature conditions. Accurate data on the evolution and behaviour of the bubbles is proposed as a basis for the evaluation of the surface area developed in the column and further design of such reactor. Two columns are used for the experiments: a small column (8 mL) with a total visualisation of the flow, and a bigger one (1 L), necessary for the scale up. Main results show that the influence of pressure and temperature are significant on the behaviour of bubbles and bubble size distribution and must be characterized and considered for the design of the columns in such conditions. The results allow the determination of two correlations: one for the bubble diameter and the other one for the bubble rise velocity, considering different parameters, and especially the superficial gas velocity in saturated conditions. These correlations are a basis to determine mass transfer correlations for the design of bubble column at high pressure and temperature conditions. (c) 2021 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
Clément Leonard, Jean-Henry Ferrasse, Sébastien Lefevre, Alain Viand, Olivier Boutin. Bubble rising velocity and bubble size distribution in columns at high pressure and temperature: From lab scale experiments to design parameters. Chemical Engineering Research and Design, 2021, 173, pp.108-118. ⟨10.1016/j.cherd.2021.07.003⟩. ⟨hal-03515133⟩
Gautier Hypolite, Jean-Henry Ferrasse, Olivier Boutin, Sandrine del Sole, Jean-François Cloarec. Dynamic modeling of water temperature and flow in large water system. Applied Thermal Engineering, 2021, 196, pp.117261. ⟨10.1016/j.applthermaleng.2021.117261⟩. ⟨hal-03515146⟩ Plus de détails...
Thermal energy counts for a large part of the total energy consumption. To reduce fossil fuel consumption for heat and cold generation, different low temperature heat sources have been considered. Water networks have been considered as a large amount of water flow through it. To measure the thermal potential of the system, this paper provides a method in unsteady state to determine water temperature and flow in large water systems made of buried pipes. The model has been applied to a raw water supply system made up of 5000 km of piping and carrying 200 million m3 annually situated in the south of France. Water temperature is calculated considering heat exchange and the spatial specificities of the network (diameter of the pipes, depth, type of soil ...). Soil and water temperature measurements have been made to validate the model values. The model can predict water flow and temperature according to time with good accuracy: maximal error of 10% on the flow is obtained, the root mean square error on the calculated temperature is 0.84 circle C, and the correlation coefficient between the calculated and the measured temperature values is 0.98. The impact of adding several heat (or cold) injections in the system has been evaluated with the model. After a 2 MW heat exchange, the water temperature is increased by at least 1circC for 10 km downstream the exchange.
Gautier Hypolite, Jean-Henry Ferrasse, Olivier Boutin, Sandrine del Sole, Jean-François Cloarec. Dynamic modeling of water temperature and flow in large water system. Applied Thermal Engineering, 2021, 196, pp.117261. ⟨10.1016/j.applthermaleng.2021.117261⟩. ⟨hal-03515146⟩
Clément Leonard, Jean-Henry Ferrasse, Sébastien Lefevre, Alain Viand, Olivier Boutin. Bubble rising velocity and bubble size distribution in columns at high pressure and temperature: From lab scale experiments to design parameters. Chemical Engineering Research and Design, 2021, 173, pp.108-118. ⟨10.1016/j.cherd.2021.07.003⟩. ⟨hal-03597596⟩ Plus de détails...
The design of bubble column for industrial applications is well known under near ambient pressure and temperature conditions, contrary to high pressure and temperature conditions. Accurate data on the evolution and behaviour of the bubbles is proposed as a basis for the evaluation of the surface area developed in the column and further design of such reactor. Two columns are used for the experiments: a small column (8 mL) with a total visualisation of the flow, and a bigger one (1 L), necessary for the scale up. Main results show that the influence of pressure and temperature are significant on the behaviour of bubbles and bubble size distribution and must be characterized and considered for the design of the columns in such conditions. The results allow the determination of two correlations: one for the bubble diameter and the other one for the bubble rise velocity, considering different parameters, and especially the superficial gas velocity in saturated conditions. These correlations are a basis to determine mass transfer correlations for the design of bubble column at high pressure and temperature conditions. (c) 2021 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
Clément Leonard, Jean-Henry Ferrasse, Sébastien Lefevre, Alain Viand, Olivier Boutin. Bubble rising velocity and bubble size distribution in columns at high pressure and temperature: From lab scale experiments to design parameters. Chemical Engineering Research and Design, 2021, 173, pp.108-118. ⟨10.1016/j.cherd.2021.07.003⟩. ⟨hal-03597596⟩
Kelly Ohanessian, Mathias Monnot, Philippe Moulin, Jean-Henry Ferrasse, Cristian Barca, et al.. Dead-end and crossflow ultrafiltration process modelling: Application on chemical mechanical polishing wastewaters. Chemical Engineering Research and Design, 2020, 158, pp.164-176. ⟨10.1016/j.cherd.2020.04.007⟩. ⟨hal-02892457⟩ Plus de détails...
Dynamic simulation of ultrafiltration process is applied to the treatment of chemical mechanical polishing wastewater from microelectronic industry. The ultrafiltration of nanoparticles (NPs) contained in chemical mechanical polishing wastewater is modelled by using different mathematical equations, which are derived from the literature and optimized to the effluent and filtration modes (dead-end or crossflow). A series of ultrafiltration experiments at laboratory scale are carried out by using chemical mechanical polishing wastewater to optimize and validate the models. Complete dead-end and crossflow ultrafiltration models are developed to simulate the treatment performances of chemical mechanical polishing wastewater under dynamic full-scale and different operating conditions, thus including filtration and washing steps. Simulations show that the dead-end mode is not suitable for chemical mechanical polishing wastewater concentration higher than 100 mgNPs L-1 due to the too fast fouling time and to the high frequency of washing step. The high concentration of chemical mechanical polishing P wastewater (2600 mgNPs L-1) forces industries to use crossflow ultrafiltration to have a profitable process by controlling parameters such as the filtration/backwashing number of cycles, the needed filtering surface and the filtration flux.
Kelly Ohanessian, Mathias Monnot, Philippe Moulin, Jean-Henry Ferrasse, Cristian Barca, et al.. Dead-end and crossflow ultrafiltration process modelling: Application on chemical mechanical polishing wastewaters. Chemical Engineering Research and Design, 2020, 158, pp.164-176. ⟨10.1016/j.cherd.2020.04.007⟩. ⟨hal-02892457⟩
Dan Feng, Laure Malleret, Audrey Soric, Olivier Boutin. Kinetic study of glyphosate degradation in wet air oxidation conditions. Chemosphere, 2020, 247, pp.125930. ⟨10.1016/j.chemosphere.2020.125930⟩. ⟨hal-02892476⟩ Plus de détails...
Glyphosate is one of the most widely used herbicides in the world against perennial and annual weeds. It has been reported to be a micro pollutant, and its degradation in different wastewater treatment processes must be studied. For that purpose, the kinetics of wet air oxidation of glyphosate was studied in an autoclave reactor at a temperature range of 423-523 K and under a total pressure of 15 MPa. Oxidation reactions obeyed the first-order kinetics with respect to glyphosate concentration. The activation energy for glyphosate oxidation was found to be equal to 68.4 kJ mol(-1). Furthermore, the possible reaction intermediates and main end products of glyphosate degradation in the wet air oxidation process were identified and quantified using UV-spectrophotometry and liquid chromatography coupled to high resolution mass spectrometry. A degradation pathway for glyphosate oxidation was proposed.
Dan Feng, Laure Malleret, Audrey Soric, Olivier Boutin. Kinetic study of glyphosate degradation in wet air oxidation conditions. Chemosphere, 2020, 247, pp.125930. ⟨10.1016/j.chemosphere.2020.125930⟩. ⟨hal-02892476⟩
C. Pinchai, Mathias Monnot, S. Lefèvre, Olivier Boutin, Philippe Moulin. Membrane filtration coupled with wet air oxidation for intensified treatment of biorefractory effluents. Water Science and Technology, 2020, pp.wst2020052. ⟨10.2166/wst.2020.052⟩. ⟨hal-02481682⟩ Plus de détails...
This work aims to analyse the performances of a new hybrid process: membrane filtration to concentrate biorefractory wastewater before being treated by a hydrothermal process such as wet air oxidation. The aim is to obtain a complete discharge of the effluent in the environment. The three different synthetic wastewaters under study were pharmaceutical wastewater, grey wastewater and bilge wastewater. The results of the membrane filtration showed high retention rates as it could reach between 75% and 100% of total organic carbon rentention, more than 99% of turbidity removal and more than 70% of hydrocarbon retention. Moreover, it was possible to achieve high concentration factors comprised between 17 and 40 times. Membrane fouling was chemically reversible regardless of the type of pollution. Then, the treatment of the membrane retentates by wet air oxidation process (300 °C, 15 MPa) could eliminate more than 83% of organic pollution for all the tested effluents. In summary, the hybrid intensified process could finally decrease the volume and the waste load of wastewater before possibly discharging it into the environment.
C. Pinchai, Mathias Monnot, S. Lefèvre, Olivier Boutin, Philippe Moulin. Membrane filtration coupled with wet air oxidation for intensified treatment of biorefractory effluents. Water Science and Technology, 2020, pp.wst2020052. ⟨10.2166/wst.2020.052⟩. ⟨hal-02481682⟩
Dan Feng, Laure Malleret, Guillaume Chiavassa, Olivier Boutin, Audrey Soric. Biodegradation capabilities of acclimated activated sludge towards glyphosate: Experimental study and kinetic modeling. Biochemical Engineering Journal, 2020, 161, pp.107643. ⟨10.1016/j.bej.2020.107643⟩. ⟨hal-02960167⟩ Plus de détails...
The acclimation process of activated sludge from a wastewater treatment plant for degradation of glyphosate and its biodegradation kinetics were studied in a batch reactor. The parameters monitored included the concentrations of glyphosate, as well as aminomethylphosphonic acid (AMPA), its main metabolite, total organic carbon (TOC), pH, dissolved oxygen (DO) and biomass concentration. M the end of the acclimation process, glyphosate removal efficiency of the acclimated sludge was compared to the fresh sludge one. The results showed that the acclimation process highly increased degradation efficiency. Complete glyphosate removal has been achieved during kinetics experiments. Glyphosate removal kinetic of the acclimated sludge was modeled by Monod model that accurately fitted the experimental results with a maximum growth rate (mu(max)) of 0.34 h(-1) and half-saturation constant (K-s) of 1600 mg L-1. Finally, a biodegradation pathway of glyphosate used as carbon source was proposed.
Dan Feng, Laure Malleret, Guillaume Chiavassa, Olivier Boutin, Audrey Soric. Biodegradation capabilities of acclimated activated sludge towards glyphosate: Experimental study and kinetic modeling. Biochemical Engineering Journal, 2020, 161, pp.107643. ⟨10.1016/j.bej.2020.107643⟩. ⟨hal-02960167⟩
Dan Feng, Audrey Soric, Olivier Boutin. Treatment technologies and degradation pathways of glyphosate: A critical review. Science of the Total Environment, 2020, 742, pp.140559. ⟨10.1016/j.scitotenv.2020.140559⟩. ⟨hal-02960128⟩ Plus de détails...
Glyphosate is one of the most widely used post-emergence broad-spectrum herbicides in the world. This molecule has been frequently detected in aqueous environment and can cause adverse effects to plants, animals, microorganisms, and humans. This review offers a comparative assessment of current treatment methods (physical, biological, and advanced oxidation process) for glyphosate wastewaters, considering their advantages and drawbacks. As for other molecules, adsorption does not destroy glyphosate. It can be used before other processes, if glyphosate concentrations are very high, or after, to decrease the final concentration of glyphosate and its by-products. Most of biological and oxidation processes can destroy glyphosate molecules, leading to by-products (the main ones being AMAP and sarcosine) that can be or not affected by these processes. This point is of major importance to control process efficiency. That is the reason why a specific focus on glyphosate degradation pathways by biological treatment or different advanced oxidation processes is proposed. However, one process is usually not efficient enough to reach the required standards. Therefore, the combination of processes (for instance biological and oxidation ones) seems to be high-performance technologies for the treatment of glyphosate-containing wastewater, due to their potential to overcome some drawbacks of each individual process. Finally, this review provides indications for future work for different treatment processes to increase their performances and gives some insights into the treatment of glyphosate or other organic contaminants in wastewater.
Dan Feng, Audrey Soric, Olivier Boutin. Treatment technologies and degradation pathways of glyphosate: A critical review. Science of the Total Environment, 2020, 742, pp.140559. ⟨10.1016/j.scitotenv.2020.140559⟩. ⟨hal-02960128⟩
Chamaiporn Pinchai, Mathias Monnot, Sébastien Lefevre, Olivier Boutin, Philippe Moulin. Coupling membrane filtration and wet air oxidation for advanced wastewater treatment: Performance at the pilot scale and process intensification potential. Canadian Journal of Chemical Engineering, 2019, pp.1-10. ⟨10.1002/cjce.23688⟩. ⟨hal-02416179⟩ Plus de détails...
Bio‐refractory wastewater treatment is compulsory for a safe discharge into the environment. This paper aims to study the use of membrane processes to concentrate wastewater to be then treated by a hydrothermal process such as wet air oxidation for advanced and intensified wastewater treatment. The work focused on three different synthetic wastewaters of public or industrial interest: pharmaceutical wastewater, grey wastewater, and bilge wastewater. Membrane processes operated at the pilot scale enabled retentions as high as 100% of total organic carbon, more than 99% of turbidity, and 70% of hydrocarbon, respectively. High concentration factors were obtained. Membrane foulings were chemically reversible whatever the type of wastewater or the membrane process. Thanks to membrane filtrations, the volumes to be treated by wet air oxidation were drastically reduced, leading to high energy savings. Membrane retentates were then treated by wet air oxidation (300°C, 15 MPa) and resulted in more than an 83% mineralization rate, regardless of the effluent. The hybrid intensified process presented in this work strongly increased the possibility of discharging into the environment by mixing the process outputs or greatly reducing the discharge volume and ultimately the waste load.
Chamaiporn Pinchai, Mathias Monnot, Sébastien Lefevre, Olivier Boutin, Philippe Moulin. Coupling membrane filtration and wet air oxidation for advanced wastewater treatment: Performance at the pilot scale and process intensification potential. Canadian Journal of Chemical Engineering, 2019, pp.1-10. ⟨10.1002/cjce.23688⟩. ⟨hal-02416179⟩
Ct Nzogo Metoule, S. Delaby, Jean-Henry Ferrasse, Olivier Boutin. Hydrothermal process development for the treatment of crocidolite asbestos waste. Waste Management and Research, 2019, 37 (9), pp.914-924. ⟨10.1177/0734242X19859426⟩. ⟨hal-02450344⟩ Plus de détails...
Ct Nzogo Metoule, S. Delaby, Jean-Henry Ferrasse, Olivier Boutin. Hydrothermal process development for the treatment of crocidolite asbestos waste. Waste Management and Research, 2019, 37 (9), pp.914-924. ⟨10.1177/0734242X19859426⟩. ⟨hal-02450344⟩
Clément Leonard, Jean-Henry Ferrasse, Sébastien Lefevre, Alain Viand, Olivier Boutin. Gas hold up in bubble column at high pressure and high temperature. Chemical Engineering Science, 2019, 200, pp.186-202. ⟨10.1016/j.ces.2019.01.055⟩. ⟨hal-02177058⟩ Plus de détails...
Gas holdup of water/nitrogen, water-phenol/nitrogen and water-phenol/air systems was successfully measured by a method based on the use of a differential pressure sensor installed on a bubble column reactor, in a wide domain of temperature (from 100 to 300 degrees C) and pressure (from 10 to 30 MPa). These experimental conditions are little or no explored in literature. Results show a predominant influence of the superficial gas velocity, the evaporation of the liquid phase, the ratio of the gas volume flowrate on the liquid volume flowrate and the phenol concentration. Pressure and chemical reaction have little effect on gas holdup. The temperature has an effect in the case of phenol solutions. The different correlations and parameters influence determined in this work are very helpful for the design of gas liquid contactors (for instance bubble column) at high pressure and high temperature.
Clément Leonard, Jean-Henry Ferrasse, Sébastien Lefevre, Alain Viand, Olivier Boutin. Gas hold up in bubble column at high pressure and high temperature. Chemical Engineering Science, 2019, 200, pp.186-202. ⟨10.1016/j.ces.2019.01.055⟩. ⟨hal-02177058⟩
Dan Feng, Jean-Henry Ferrasse, Audrey Soric, Olivier Boutin. Bubble characterization and gas–liquid interfacial area in two phase gas–liquid system in bubble column at low Reynolds number and high temperature and pressure. Chemical Engineering Research and Design, 2019, 144, pp.95-106. ⟨10.1016/j.cherd.2019.02.001⟩. ⟨hal-02177001⟩ Plus de détails...
Bubbles hydrodynamic in gas-liquid contactor, including bubble size distribution, bubble size and gas-liquid interfacial area, was evaluated as a function of superficial gas velocity, superficial liquid velocity, temperature, pressure and different gases (N-2 and He) and liquids (water and ethanol/water mixture) phases. The results showed that with the increase of superficial gas velocity, the bubble size distribution shifted from smaller- to larger-size bubble and the Sauter mean diameter, the gas holdup and the interfacial area generally increased due to the increase of coalescence. The effect of superficial liquid velocity on bubble characteristics was not significant. Pressure and temperature showed slight influence on gas holdup and interfacial area. The bubble characteristics were not significantly influenced by the type of gas phase, but mainly affected by the liquid composition. Correlations to predict Sauter mean bubble diameter and the gas holdup are developed using Kanaris correlation and in good agreement with experimental results.
Dan Feng, Jean-Henry Ferrasse, Audrey Soric, Olivier Boutin. Bubble characterization and gas–liquid interfacial area in two phase gas–liquid system in bubble column at low Reynolds number and high temperature and pressure. Chemical Engineering Research and Design, 2019, 144, pp.95-106. ⟨10.1016/j.cherd.2019.02.001⟩. ⟨hal-02177001⟩
Marine Minière, Olivier Boutin, Audrey Soric. Combination of chemical and biological processes to enhance the treatment of hardly biodegradable matter in industrial wastewater: Selection parameters and performances. Canadian Journal of Chemical Engineering, 2019, 97 (S1), pp.1361-1370. ⟨10.1002/cjce.23414⟩. ⟨hal-02177025⟩ Plus de détails...
The increasing complexity of industrial effluents, combined with the increase in discharge constraints, leads to the necessity to improve processes treatment. Apart from new processes, the combination and optimization of existing processes could be the answer to these questions. Regarding coupling processes, the purifying potential has been demonstrated for a large range of processes, pollutants, and effluents. However, there has been a lack of studies integrating a biological process, although this has increased since 2000. The objective of this review is to focus on the combination of chemical and biological treatments for industrial applications and to provide recommendations based on different examples from the literature.
Marine Minière, Olivier Boutin, Audrey Soric. Combination of chemical and biological processes to enhance the treatment of hardly biodegradable matter in industrial wastewater: Selection parameters and performances. Canadian Journal of Chemical Engineering, 2019, 97 (S1), pp.1361-1370. ⟨10.1002/cjce.23414⟩. ⟨hal-02177025⟩
Marine Minière, Olivier Boutin, Audrey Soric. Evaluation of degradation and kinetics parameters of acid orange 7 through wet air oxidation process. Canadian Journal of Chemical Engineering, 2018, 96 (11), pp.2450-2454. ⟨10.1002/cjce.23195⟩. ⟨hal-02114681⟩ Plus de détails...
Among the industrial effluents presenting constraints to traditional biological treatments, those from textile industries are of particular concern. Wet air oxidation is an effective process that significantly increases biodegradability of the treated effluent. In this study, the advantage of this process was tested for the treatment of acid orange 7, a dye molecule used as a model textile effluent. Different experimental conditions of temperature (200 to 300 8C) and duration of treatment were used to determine its degradation yield during the wet air oxidation process, at a total pressure of 30 MPa. All these conditions led to complete degradation of acid orange 7, but residual Total Organic Carbon always remained. Oxidation byproducts were identified by the means of GC and HPLC analyses. Acetic acid remains the major compound not oxidized. These experiments resulted in the proposal of a reaction scheme associated with kinetic constants. Finally, the optimal conditions for the improvement of the biodegradability of the effluent were determined. This wet air oxidation process could then be coupled with a biological treatment to obtain an overall degradation meeting the criteria for release into the environment.
Marine Minière, Olivier Boutin, Audrey Soric. Evaluation of degradation and kinetics parameters of acid orange 7 through wet air oxidation process. Canadian Journal of Chemical Engineering, 2018, 96 (11), pp.2450-2454. ⟨10.1002/cjce.23195⟩. ⟨hal-02114681⟩
Clément Leonard, Jean-Henry Ferrasse, Olivier Boutin, Sébastien Lefevre, Alain Viand. Measurements and correlations for gas liquid surface tension at high pressure and high temperature. AIChE Journal, 2018, 64 (11), pp.4110-4117. ⟨10.1002/aic.16216⟩. ⟨hal-02114480⟩ Plus de détails...
Surface tension of water/nitrogen and water-phenol/nitrogen systems was successfully measured by the hanging drop method in a wide domain of temperature (from 100 to 300°C) and pressure (from 4 to 30MPa), conditions little explored literature. Results show that surface tension of water-phenol mixtures decreases as phenol mass fraction increases. This decrease is observed under saturated and unsaturated conditions and is more pronounced at low temperatures and does not seem to depend on pressure. The effect of saturation on surface tension in the water/nitrogen system has been correlated with water vapor pressure by using experimental points with a great accuracy. For the water-phenol/nitrogen system, experimental data obtained with different mass fraction of phenol were correlated using Macleod-Sugden equation for mixtures. Topical heading Reaction Engineering, Kinetics and Catalysis Transport Phenomena and Fluid Mechanics
Clément Leonard, Jean-Henry Ferrasse, Olivier Boutin, Sébastien Lefevre, Alain Viand. Measurements and correlations for gas liquid surface tension at high pressure and high temperature. AIChE Journal, 2018, 64 (11), pp.4110-4117. ⟨10.1002/aic.16216⟩. ⟨hal-02114480⟩
Félicité Ondze, Jean-Henry Ferrasse, Olivier Boutin, Jean-Christophe Ruiz, Frédéric Charton. Process simulation and energetic analysis of different supercritical water gasification systems for the valorisation of biomass. Journal of Supercritical Fluids, 2018, 133, pp.114 - 121. ⟨10.1016/j.supflu.2017.10.002⟩. ⟨hal-02115423⟩ Plus de détails...
The energetic efficiency for the supercritical gasification of biomass is studied for three cases: hydrogen and methane production, heat and electricity cogeneration. Experimental results from the gasification of glucose are used to represent the gasifier. The other unit operations are simulated using the software ProsimPlus through thermodynamic equilibrium calculations. Simulations are conducted at different pressure, temperature and initial biomass concentration. The energetic and exergetic yields are calculated, as well as the minimum heat requirement estimated from a pinch analysis. All the results are then exploited to determine optimal conditions for two systems: adiabatic and isothermal.
Félicité Ondze, Jean-Henry Ferrasse, Olivier Boutin, Jean-Christophe Ruiz, Frédéric Charton. Process simulation and energetic analysis of different supercritical water gasification systems for the valorisation of biomass. Journal of Supercritical Fluids, 2018, 133, pp.114 - 121. ⟨10.1016/j.supflu.2017.10.002⟩. ⟨hal-02115423⟩
Antoine Leybros, Laurence Hung, Audrey Hertz, Didier Hartmann, Agnès Grandjean, et al.. Supercritical CO2 extraction of uranium from natural ore using organophosphorus extractants. Chemical Engineering Journal, 2017, 316, pp.196-203. ⟨10.1016/j.cej.2017.01.101⟩. ⟨hal-01583524⟩ Plus de détails...
The feasibility of extracting uranium from natural ores has been studied, using supercritical CO2 and either commercial extractants (PC88A, Cyanex 301®) or an amidophosphonate molecule (named DEHCNPB). The impact of the process parameters has been evaluated. The uranium extraction yield was optimal at the lowest temperature (40°C) and highest pressure (25MPa) tested here. For a given CO2 flow rate, a compromise should be established between the amounts of extractant, acid and oxidant used. Uranium was successfully extracted directly from natural ore using DEHCNPB with a good selectivity over metal impurities such as iron, titanium and vanadium and yields up to 97%. Moreover, using Fe2(SO4)3 as an oxidant allows to minimize the water usage of the process. The mechanism of extraction using supercritical CO2 has been elucidated thanks to electrospray ionization mass spectrometry.
Antoine Leybros, Laurence Hung, Audrey Hertz, Didier Hartmann, Agnès Grandjean, et al.. Supercritical CO2 extraction of uranium from natural ore using organophosphorus extractants. Chemical Engineering Journal, 2017, 316, pp.196-203. ⟨10.1016/j.cej.2017.01.101⟩. ⟨hal-01583524⟩
Marine Minière, Olivier Boutin, Audrey Soric. Experimental coupling and modelling of wet air oxidation and packed-bed biofilm reactor as an enhanced phenol removal technology. Environmental Science and Pollution Research, 2017, 24 (8), pp.7693-7704. ⟨10.1007/s11356-017-8435-5⟩. ⟨hal-01629950⟩ Plus de détails...
Experimental coupling of wet air oxidation process and aerobic packed-bed biofilm reactor is presented. It has been tested on phenol as a model refractory compound. At 30 MPa and 250 °C, wet air oxidation batch experiments led to a phenol degradation of 97% and a total organic carbon removal of 84%. This total organic carbon was mainly due to acetic acid. To study the interest of coupling processes, wet air oxidation effluent was treated in a biological treatment process. This step was made up of two packed-bed biofilm reactors in series: the first one acclimated to phenol and the second one to acetic acid. After biological treatment, phenol and total organic carbon removal was 99 and 97% respectively. Thanks to parameters from literature, previous studies (kinetic and thermodynamic) and experimental data from this work (hydrodynamic parameters and biomass characteristics), both treatment steps were modelled. This modelling allows the simulation of the coupling process. Experimental results were finally well reproduced by the continuous coupled process model: relative error on phenol removal efficiency was 1 and 5.5% for wet air oxidation process and packed-bed biofilm reactor respectively.
Marine Minière, Olivier Boutin, Audrey Soric. Experimental coupling and modelling of wet air oxidation and packed-bed biofilm reactor as an enhanced phenol removal technology. Environmental Science and Pollution Research, 2017, 24 (8), pp.7693-7704. ⟨10.1007/s11356-017-8435-5⟩. ⟨hal-01629950⟩
Journal: Environmental Science and Pollution Research
The development of environmental-friendly process for strategic metal extraction, limiting organic solvent use and effluent production, appears to be quite a challenging purpose. Production of pure molybdenum using supercritical CO2 extraction process, from sulfuric solution obtained by ore or used catalyst leaching, has been evaluated. Two organic ligands, trioctylamine and 2-ethylhexyl 2-ethylhexylphosphonic acid, were studied to extract Mo as metal complexes solubilized in supercritical CO2. Extraction with trioctylamine revealed to be non-efficient due to a lack of Mo-trioctylamine complex solubility in CO2, even if extraction selectivity of molybdenum versus iron impurity was interesting. On the contrary, extraction with 2-ethylhexyl 2-ethylhexylphosphonic acid leads to high Mo collection efficiency (up to 90% in 7 h). However, no selectivity was observed between molybdenum and zirconium. The selectivity of 2-ethylhexyl 2-ethylhexylphosphonic acid towards molybdenum in presence of iron was better but clearly decreased in presence of zirconium.
Laurence Hung, Audrey Hertz, Didier Hartmann, Frédéric Charton, Olivier Boutin. Supercritical CO2 extraction of molybdenum-ligand complexes from sulfuric solutions. Journal of Supercritical Fluids, 2016, 111, pp.97-103. ⟨10.1016/j.supflu.2016.01.017⟩. ⟨hal-01297659⟩
Antoine Leybros, Agnès Grandjean, Nathalie Segond, Marc Messalier, Olivier Boutin. Cesium removal from contaminated sand by supercritical CO2 extraction. Journal of Environmental Chemical Engineering, 2016, 4 (1), pp.1076-1080. ⟨10.1016/j.jece.2016.01.009⟩. ⟨hal-01300394⟩ Plus de détails...
Supercritical CO2 extraction is a promising process among existing decontamination methods. Feasibility of supercritical CO2 extraction processing for decontamination of contaminated soils has been studied with non-radioactive cesium as contaminant. Extractant system considered was a mixture of DB18C6 crown ether and HPFOA that gave a synergistic effect when combined. Process parameters influence such as operating pressure (25–29 MPa) and temperature (40–80 °C), initial cesium/extractant/cationic exchanger amounts (molar ratio between 1/12/12 and 1/100/100) and soil moisture (0–6%wt) has been tested. Low temperature (40 °C) and high pressure (29 MPa) allow to optimize process ability for cesium removal. A compromise should be established, for a fixed CO2 flow rate, between amounts of extractants and cationic exchangers. Efficiency of cesium removal seems to be optimized at 3%wt matrix moisture. Extraction from sand is successful with yields up to 95%.
Antoine Leybros, Agnès Grandjean, Nathalie Segond, Marc Messalier, Olivier Boutin. Cesium removal from contaminated sand by supercritical CO2 extraction. Journal of Environmental Chemical Engineering, 2016, 4 (1), pp.1076-1080. ⟨10.1016/j.jece.2016.01.009⟩. ⟨hal-01300394⟩
Journal: Journal of Environmental Chemical Engineering
Hong-Son Pham, Nicolas Alpy, Jean-Henry Ferrasse, Olivier Boutin, Mark Tothill, et al.. An approach for establishing the performance maps of the sc-CO2 compressor: Development and qualification by means of CFD simulations. International Journal of Heat and Fluid Flow, 2016, 61 (Part B), pp.379-394. ⟨10.1016/j.ijheatfluidflow.2016.05.017⟩. ⟨hal-01461787⟩ Plus de détails...
One of the challenges in the performance prediction of the supercritical CO2 (sc-CO2) compressor is the real gas behavior of the working fluid near the critical point. This study deals with the establishment of an approach that allows coping with this particularity by dressing compressor performance maps in adequate reduced coordinates (i.e., suitable dimensionless speed and flow parameters inputs and pressure ratio and enthalpy rise outputs), while using CFD for its validation. Two centrifugal compressor designs have been considered in this work. The first one corresponds to a 6 kW small scale component implemented in a test loop at Tokyo Institute of Technology. The second one corresponds to a 38 MW scale 1:1 design considered at an early stage of a project that investigates sc-CO2 cycle for a Small Modular Reactor application. Numerical results on the former have been successfully confronted with the experimental data to qualify the ability of CFD to provide a performance database. Results on the latter have revealed a significant decrease in the static temperature and pressure during flow acceleration along the leading edge of the impeller blades. In this line, the increased risk of vapor pockets appearance inside a sc-CO2 compressor has been highlighted and recommendations regarding the choice of the on-design inlet conditions and the compressor design have been given to overcome this concern. CFD results on the scale 1:1 compressor have then been used to evaluate the relevancy of some previous performance maps approaches for a sc-CO2 compressor application. These include the conventional approach for ideal gas and its derivation, as well as a reference approach from the literature that was previously applied to model a sc-CO2 test compressor. As the dimensionless parameters of these approaches are found to yield discrepancies on the compressor performance, a revised approach that incorporates real gas formulations into turbomachinery key similarity parameters has been finally proposed. In support, an extensive number of CFD case studies has been carried out at various compressor inlet conditions, providing numerical results for its qualification. Accordingly, the proposed approach has been found to succeed in consistently representing and accurately predicting the sc-CO2 compressor performance over a wide operating range.
Hong-Son Pham, Nicolas Alpy, Jean-Henry Ferrasse, Olivier Boutin, Mark Tothill, et al.. An approach for establishing the performance maps of the sc-CO2 compressor: Development and qualification by means of CFD simulations. International Journal of Heat and Fluid Flow, 2016, 61 (Part B), pp.379-394. ⟨10.1016/j.ijheatfluidflow.2016.05.017⟩. ⟨hal-01461787⟩
Journal: International Journal of Heat and Fluid Flow
Hong-Son Pham, Nicolas Alpy, S. Mensah, Mark Tothill, Jean-Henry Ferrasse, et al.. A numerical study of cavitation and bubble dynamics in liquid CO2 near the critical point. International Journal of Heat and Mass Transfer, 2016, 102, pp.174-185. ⟨10.1016/j.ijheatmasstransfer.2016.06.005⟩. ⟨hal-01461785⟩ Plus de détails...
This study aims to provide insights into the cavitation and bubble dynamics in liquid CO2 near the critical point. It is inspired by a previous work that reports the absence of dysfunctional behavior during the operation of a test compressor in the two-phase region of CO2. First, several characteristic parameters in the literature have suggested that thermal effects have significant impact on the dynamics of a CO2 bubble. These effects lead to the change of vapor pressure inside the bubble, impeding the motion of the bubble interface. As a consequence, the CO2 bubble collapse should feature a slow contraction of the bubble interface and the absence of noticeable pressure rise. In addition, a dynamic model has been proposed to quantitatively study the bubble collapse in liquid CO2 near the critical point. Simulation results have confirmed the qualitative prediction given by characteristic parameters. They have also revealed that the thermal layer inside the bubble has an important contribution to the bubble dynamics, in addition to the one outside the bubble, by altering the rate of phase change at the interface. These predicted results appear to be in line with the aforementioned experimental observations.
Hong-Son Pham, Nicolas Alpy, S. Mensah, Mark Tothill, Jean-Henry Ferrasse, et al.. A numerical study of cavitation and bubble dynamics in liquid CO2 near the critical point. International Journal of Heat and Mass Transfer, 2016, 102, pp.174-185. ⟨10.1016/j.ijheatmasstransfer.2016.06.005⟩. ⟨hal-01461785⟩
Journal: International Journal of Heat and Mass Transfer
Clément Leonard, Jean-Henry Ferrasse, Olivier Boutin, Sébastien Lefevre, Alain Viand. Bubble column reactors for high pressures and high temperatures operation. Chemical Engineering Research and Design, 2015, 100, pp.391-421. ⟨10.1016/j.cherd.2015.05.013⟩. ⟨hal-04348574⟩ Plus de détails...
Bubble column reactors are multiphase contactors based on the dispersion of a gas phase in the form of bubbles inside a cylindrical vessel where a liquid or a suspension circulates. Those reactors present many advantages such as good heat and mass transfer rates, no moving parts, compactness, easy operating and low maintenance and operating costs. Their main drawback is the significant backmixing which can affect selectivity and conversion of reaction products. They have gained particular attention in the field of wastewater treatment for Wet Air Oxidation (WAO) processes application. Those processes are operated at high pressures (up to 30 MPa) and temperatures (up to 573 K). In order to efficiently operate those processes, conversion, heat and mass transfer must be optimised. Those parameters depend themselves on operating conditions such as pressure, temperature, superficial gas and liquid velocities and on design parameters such as sparger and column design. This review is aimed to find the relevant parameters for operating bubble column at high pressures and temperatures in continuous mode. The main mechanisms governing the bubble column will be described. The influence of the different parameters on gas holdup, mass transfer properties and on liquid axial dispersion coefficient will be extensively studied.
Clément Leonard, Jean-Henry Ferrasse, Olivier Boutin, Sébastien Lefevre, Alain Viand. Bubble column reactors for high pressures and high temperatures operation. Chemical Engineering Research and Design, 2015, 100, pp.391-421. ⟨10.1016/j.cherd.2015.05.013⟩. ⟨hal-04348574⟩
C. Leonard, J.-H. Ferrasse, Olivier Boutin, S. Lefevre, A. Viand. Bubble column reactors for high pressures and high temperatures operation. Chemical Engineering Research and Design, 2015, 100, pp.391-421. ⟨10.1016/j.cherd.2015.05.013⟩. ⟨hal-01292678⟩ Plus de détails...
Bubble column reactors are multiphase contactors based on the dispersion of a gas phase in the form of bubbles inside a cylindrical vessel where a liquid or a suspension circulates. Those reactors present many advantages such as good heat and mass transfer rates, no moving parts, compactness, easy operating and low maintenance and operating costs. Their main drawback is the significant backmixing which can affect selectivity and conversion of reaction products. They have gained particular attention in the field of wastewater treatment for Wet Air Oxidation (WAO) processes application. Those processes are operated at high pressures (up to 30 MPa) and temperatures (up to 573 K). In order to efficiently operate those processes, conversion, heat and mass transfer must be optimised. Those parameters depend themselves on operating conditions such as pressure, temperature, superficial gas and liquid velocities and on design parameters such as sparger and column design. This review is aimed to find the relevant parameters for operating bubble column at high pressures and temperatures in continuous mode. The main mechanisms governing the bubble column will be described. The influence of the different parameters on gas holdup, mass transfer properties and on liquid axial dispersion coefficient will be extensively studied.
C. Leonard, J.-H. Ferrasse, Olivier Boutin, S. Lefevre, A. Viand. Bubble column reactors for high pressures and high temperatures operation. Chemical Engineering Research and Design, 2015, 100, pp.391-421. ⟨10.1016/j.cherd.2015.05.013⟩. ⟨hal-01292678⟩
Hong-Son Pham, Nicolas Alpy, Jean-Henry Ferrasse, Olivier Boutin, J. Quenaut, et al.. Mapping of the thermodynamic performance of the supercritical CO2 cycle and optimisation for a small modular reactor and a sodium-cooled fast reactor. Energy, 2015, 87, pp.412-424. ⟨10.1016/j.energy.2015.05.022⟩. ⟨hal-01297663⟩ Plus de détails...
The supercritical CO2 (sc-CO2) cycle is being promoted worldwide by many R&D energy organisations and companies as an alternative to the Rankine steam cycle for its capacity to deliver high performance, simple and compact power conversion systems. The past decade has seen an extensive number of published studies carried out in view of analysing the advantages of this cycle for various applications, from nuclear to solar energies. In that context, this work first reports a mapping of the thermodynamic performance of different sc-CO2 cycle configurations that encompass a 250–850°C TIT (turbine inlet temperature) range. The main compressor inlet temperature was chosen to be 35°C to accommodate various heat-sink temperatures while the maximum pressure was parameterised at 20 MPa and at 25 MPa. These charts are seen to provide a preliminary engineering guideline to the maximum performance that one can expect from a sc-CO2 cycle coupled to a specific application. Additionally, they illustrate the effect of the interlinked constraints in terms of optimal recuperation power and IHX (Intermediate Heat eXchanger) inlet temperature. Following this generic study, two typical nuclear applications have been investigated with the support of an exergy analysis. A SMR (small modular reactor) featuring a current generation Pressurized Water Reactor has been chosen as an example of a low temperature range case. Parametric studies of a recompression cycle featuring a TIT of 275°C have guided investigations regarding optimal operating conditions depending on a balance between cycle efficiency, recuperation power, and main compressor operation margin with respect to the critical point. Options for performance improvement such as reheat and condensing mode operation have been investigated for a maximum cycle pressure of 20 MPa. Thermal efficiencies of 29.3% and 28.6% respectively are reported for these two cases. This is in contrast to 27.1% for the initial recompression cycle design. Even though the penalty when compared to a Rankine steam cycle is significant, the sc-CO2 cycle in condensing mode is viewed as an interesting option thanks to its system simplicity and footprint saving. Moving to a higher temperature range, the sc-CO2 cycle has been studied at a TIT of 515°C for a test case application to a SFR (sodium-cooled fast reactor). The recompression cycle operating at a compressor inlet temperature of 35°C provides a maximum efficiency of 43.9% and features an optimal IHX inlet temperature of 347.8°C. However the considered application requires that this temperature should be kept below 330°C. Work has been carried out to optimise the cycle with regard to this specific constraint through several options including the modification of the operating conditions and the investigation of other cycle configurations. The recompression cycle in condensing mode is finally identified as the most interesting one since it achieves an efficiency of 45.7% and features an optimal IHX inlet temperature of 328.6°C.
Hong-Son Pham, Nicolas Alpy, Jean-Henry Ferrasse, Olivier Boutin, J. Quenaut, et al.. Mapping of the thermodynamic performance of the supercritical CO2 cycle and optimisation for a small modular reactor and a sodium-cooled fast reactor. Energy, 2015, 87, pp.412-424. ⟨10.1016/j.energy.2015.05.022⟩. ⟨hal-01297663⟩
Félicité Ondze, Olivier Boutin, Jean-Christophe Ruiz, Jean-Henry Ferrasse, Frédéric Charton. Supercritical water gasification of beet residues: From batch to continuous reactor. Chemical Engineering Science, 2015, 123, pp.350-358. ⟨10.1016/j.ces.2014.11.026⟩. ⟨hal-01297667⟩ Plus de détails...
A residue obtained after the distillation of agricultural alcohol called beet residues is gasified in supercritical water to form a mixture of fuel gas. A parametric study and thermodynamic calculations are first proposed in batch reactor. The results show a significant effect of temperature on the overall mass yields. Gasification efficiencies range from 0.60 to 0.90 g g−1 when temperature increases from 450 to 600 °C. The gas low heating value increases under these conditions from 7.4 to 13.2 MJ kg−1 of initial dry feedstock. After that, a continuous system designed for hydrothermal oxidation processes has been used. For supercritical water gasification, the reduction of total organic carbon in the liquid effluent output presents a little variation, between 59 and 69%, when the operating conditions are changed. To increase the reaction temperature, supercritical water partial oxidation has been conducted. The highest carbon gasification yield is obtained for the highest equivalent molar ratio, indicating a great interest of partial oxidation. Moreover, the results indicate that this process configuration accepts biomass flow variations without influencing the global efficiency.
Félicité Ondze, Olivier Boutin, Jean-Christophe Ruiz, Jean-Henry Ferrasse, Frédéric Charton. Supercritical water gasification of beet residues: From batch to continuous reactor. Chemical Engineering Science, 2015, 123, pp.350-358. ⟨10.1016/j.ces.2014.11.026⟩. ⟨hal-01297667⟩
Doassans-Carrère Nicolas, Jean-Henry Ferrasse, Olivier Boutin, Guillain Mauviel, Jacques Lédé. Comparative study of biomass fast pyrolysis and direct liquefaction for bio-oils production: Products yield and
characterizations. Energy & Fuels, 2014, 28, pp.5103-5111. ⟨10.1021/ef500641c⟩. ⟨hal-01232013⟩ Plus de détails...
The objective of this work is to compare two biomass-to-oil processes: fast pyrolysis and direct liquefaction, using the same biomass (beech sawdust). Fast pyrolysis is conducted in a cyclone reactor (wall temperature between 870 and 1040 K) and direct liquefaction in a 150-mL-autoclave reactor (bulk temperature between 420 and 600 K). Three fractions of pyro-oil are obtained from fast pyrolysis (heavy oil, light oil, and aerosol), whereas two fractions of liq-oil (heavy oil and water-soluble organics) are obtained from direct liquefaction. The comparison of both processes is based on the product yields and their characterization (ultimate analysis for solid and oils, oil−water content, gas and oil molecular composition, 1 H NMR for oils). For both processes, there is an optimal temperature at which the oil yield is maximum. Up to 62.6 wt % of pyro-oil are obtained at 970 K with the cyclone reactor (with 25.7 wt % of gas and 11.7 wt % of solid), whereas 47.0 wt % of liq-oil was obtained at 573 K with the batch-reactor (completed by 5.5 wt % of gas and 17.8 wt % of solid). Water content mainly explains the differences (mass yield and oxygen content) between oils from fast pyrolysis and direct liquefaction. Nevertheless, there are also some differences in organic composition: levoglucosane is a main component in pyro-oil, whereas levulinic acid is a main component in liq-oil. Finally, gas formed during direct liquefaction is mainly composed of CO2 (more than 99 wt %), whereas gas from fast pyrolysis is a mixture of CO, CO2, H2, CH4, and light hydrocarbons.
Doassans-Carrère Nicolas, Jean-Henry Ferrasse, Olivier Boutin, Guillain Mauviel, Jacques Lédé. Comparative study of biomass fast pyrolysis and direct liquefaction for bio-oils production: Products yield and
characterizations. Energy & Fuels, 2014, 28, pp.5103-5111. ⟨10.1021/ef500641c⟩. ⟨hal-01232013⟩
Jean-Henry Ferrasse, Sébastien Lefèvre, Rémy Faucherand, Alain Viand, Olivier Boutin. Energetic optimization of wet air oxidation process using experimental design coupled with process simulation. Atomic Energy Review, 2012, 41 (1), pp.175-183. ⟨10.1016/j.energy.2011.09.043⟩. ⟨hal-01297671⟩ Plus de détails...
Wet air oxidation process (WAO) is used for wastewater treatment, especially when it contains high chemical oxygen demand. With non-catalytic processes, temperatures between 200 and 350 °C and pressures between 15 and 30 MPa are generally applied. A method, based on the coupling of simulations and experimental design, is used to compare and optimize two reactors (adiabatic and isotherm), their volume being equal and fixed. The interest of an experimental design approach is to plan simulation and to present results in immediate response surface. Four parameters have been selected; temperature, pressure, chemical oxygen demand, air ratio. After achieving the 25 simulations of the “numerical design”, mass and energy balances were analysed through two energetic values integrated as the design responses: exergetic efficiency and minimum heat required by the process for the functioning. The surface response methodology determines which are the most influencing parameters on design responses. It also shows that temperature of reaction and air ratio are the most influencing parameters. At least elements to calculate the cost of the plant, for both reactors are given. Both reactors allow to get complete degradation of pollutants, but strategy of investment and control are opposite.
Jean-Henry Ferrasse, Sébastien Lefèvre, Rémy Faucherand, Alain Viand, Olivier Boutin. Energetic optimization of wet air oxidation process using experimental design coupled with process simulation. Atomic Energy Review, 2012, 41 (1), pp.175-183. ⟨10.1016/j.energy.2011.09.043⟩. ⟨hal-01297671⟩
A. Leybros, A. Roubaud, Pierrette Guichardon, Olivier Boutin. Supercritical water oxidation of ion exchange resins in a stirred reactor: numerical modelling. Chemical Engineering Science, 2012, 69 (1), pp.170-180. ⟨10.1016/j.ces.2011.10.016⟩. ⟨hal-00993023⟩ Plus de détails...
Supercritical water oxidation offers a viable alternative treatment to destroy the organic structure of Ion Exchange Resins. In order to design and define appropriate dimensions for the supercritical oxidation reactor, a 2D simulation of the fluid dynamics and heat transfer during the oxidation process has been investigated. The solver used is a commercial code, Fluent® 6.3. The turbulent flow field in the reactor, created by the stirrer is taken into account with a k−ω model and a swirl imposed to the fluid. Particle trajectories are modelled with the Discrete Random Walk Particle Model. For the solubilization of the particles in supercritical water, a mechanism has been proposed and implemented into Fluent® software through the Eddy Dissipation Concept approach, taking into account the identified rate determining species. Simulation results provide results on the flow, temperature fields and oxidation localization inside the reactor. For the reactive particles-supercritical water flow model, the effect of parameters, such as feed flow rates or stirring velocity, can be focussed. Reaction temperature is predicted with deviation lower than 15%. Degradation conversions are in good agreement with experimental ones.
A. Leybros, A. Roubaud, Pierrette Guichardon, Olivier Boutin. Supercritical water oxidation of ion exchange resins in a stirred reactor: numerical modelling. Chemical Engineering Science, 2012, 69 (1), pp.170-180. ⟨10.1016/j.ces.2011.10.016⟩. ⟨hal-00993023⟩
S. Moussiere, A. Roubaud, Olivier Boutin, Pierrette Guichardon, B. Fournel, et al.. 2D and 3D CFD modelling of a reactive turbulent flow in a double shell supercritical water oxidation reactor. Journal of Supercritical Fluids, 2012, 65, pp.25-31. ⟨10.1016/j.supflu.2012.02.019⟩. ⟨hal-00992976⟩ Plus de détails...
In order to design and define appropriate dimensions for a supercritical oxidation reactor, a comparative 2D and 3D simulation of the fluid dynamics and heat transfer during an oxidation process has been performed. The solver used is a commercial code, Fluent 6.2®. The turbulent flow field in the reactor, created by the stirrer, is taken into account with a k-ω model and a swirl imposed to the fluid. In the 3D case the rotation of the stirrer can be modelled using the sliding mesh model and the moving reference frame model. This work allows comparing 2D and 3D velocity and heat transfer calculations. The predicted values (mainly species concentrations and temperature profiles) are of the same order in both cases. The reactivity of the system is taken into account with a classical Eddy Dissipation Concept combustion model. Comparisons with experimental temperature measurements validate the ability of the CFD modelling to simulate the supercritical water oxidation reactive medium. Results indicate that the flow can be considered as plug flow-like and that heat transfer is strongly enhanced by the stirring.
S. Moussiere, A. Roubaud, Olivier Boutin, Pierrette Guichardon, B. Fournel, et al.. 2D and 3D CFD modelling of a reactive turbulent flow in a double shell supercritical water oxidation reactor. Journal of Supercritical Fluids, 2012, 65, pp.25-31. ⟨10.1016/j.supflu.2012.02.019⟩. ⟨hal-00992976⟩
Olivier Boutin. Influence of introduction devices on crystallisation kinetic parameters in a supercritical antisolvent process. Journal of Crystal Growth, 2012, 342 (1), pp.13-20. ⟨10.1016/j.jcrysgro.2010.11.099⟩. ⟨hal-00992991⟩ Plus de détails...
Supercritical CO2 antisolvent processes developed in this work are based on two different introduction devices: the Concentric Tube Antisolvent Reactor (a capillary centred in a larger tube) and the Impinging Jet Technology (organic solution and supercritical CO2 impinging face to face). Griseofulvin pharmaceutical compound is chosen to test those two processes. The different experimental results indicate the same trends as classical supercritical antisolvent process for the evolution of particle size and particle size distribution with process parameters (mainly concentrations and flow rates). The second and main part is dedicated to the use of these experimental results for deriving modelling evaluation. Concerning this part, it is first shown that, in a first approximation, these processes can be represented by a continuous, mixed suspension and mixed product removal crystallizer. This allows modelling the mass particle size distribution. It also allows giving some numerical data on kinetics parameters (nucleation and growth). Secondly, general kinetic laws are derived for each process. In particular in the case of the impinging jet technology, the energy dissipated in the medium by the flow rates must be included in the crystallisation kinetic law.
Olivier Boutin. Influence of introduction devices on crystallisation kinetic parameters in a supercritical antisolvent process. Journal of Crystal Growth, 2012, 342 (1), pp.13-20. ⟨10.1016/j.jcrysgro.2010.11.099⟩. ⟨hal-00992991⟩
Stéphanie Careno, Olivier Boutin, Elisabeth Badens. Drug recrystallisation using supercritical anti-solvent (SAS) process with impinging jets: effects of process parameters. Journal of Crystal Growth, 2012, 342 (1), pp.34-41. ⟨10.1016/j.jcrysgro.2011.06.059⟩. ⟨hal-00993004⟩ Plus de détails...
The aim of this study is to improve mixing in supercritical anti-solvent process (SAS) with impinging jets in order to form finer particles of sulfathiazole, a poorly water-soluble drug. The influence of several process parameters upon the powder characteristics is studied. Parameters are jets' velocity (0.25 m/s to 25.92 m/s), molar ratio solvent/CO2 (2.5% to 20%), temperature (313 K to 343 K), pressure (10 MPa to 20 MPa) and sulfathiazole concentration in the organic solution (0.5% to 1.8%). Two solvents are used: acetone and methanol. Smaller particles with a more homogeneous morphology are obtained from acetone solutions. For the smallest jets' velocity, corresponding to a non-atomized jet, the stable polymorphic form is obtained, pure or in mixture. At this velocity, pressure is the most influential parameter controlling the polymorphic nature of the powder formed. The pure stable polymorph is formed at 20 MPa. Concerning the particle size, the most influential parameters are temperature and sulfathiazole concentration. The use of impinging jets with different process parameters allows the crystallization of four polymorphs among the five known, and particle sizes are varied. This work demonstrates the studied device ability of the polymorph and the size control. A comparison with the classical SAS process shows that particle size, size distribution and morphology of particles crystallized with impinging jets are different from the ones obtained with classical SAS introduction device in similar operating conditions. Mean particle sizes are significantly smaller and size distributions are narrower with impinging jets device.
Stéphanie Careno, Olivier Boutin, Elisabeth Badens. Drug recrystallisation using supercritical anti-solvent (SAS) process with impinging jets: effects of process parameters. Journal of Crystal Growth, 2012, 342 (1), pp.34-41. ⟨10.1016/j.jcrysgro.2011.06.059⟩. ⟨hal-00993004⟩
Sébastien Lefèvre, Olivier Boutin, Jean-Henry Ferrasse, Laure Malleret, Rémy Faucherand, et al.. Thermodynamic and kinetic study of phenol degradation by a non-catalytic wet air oxidation process. Chemosphere, 2011, 84 (9), pp.1208-1215. ⟨10.1016/j.chemosphere.2011.05.049⟩. ⟨hal-01297674⟩ Plus de détails...
This work is dedicated to an accurate evaluation of thermodynamic and kinetics aspects of phenol degradation using wet air oxidation process. Phenol is a well known polluting molecule and therefore it is important having data of its behaviour during this process. A view cell is used for the experimental study, with an internal volume of 150 mL, able to reach pressures up to 30 MPa and temperatures up to 350 °C. Concerning the thermodynamic phase equilibria, experimental and modelling results are obtained for different binary systems (water/nitrogen, water/air) and ternary system (water/nitrogen/phenol). The best model is the Predictive Soave Redlich Kwong one. This information is necessary to predict the composition of the gas phase during the process. It is also important for an implementation in a process simulation. The second part is dedicated to kinetics evaluation of the degradation of phenol. Different compounds have been detected using GC coupled with a MS. A kinetic scheme is deduced, taking into account the evolution of phenol, hydroquinones, catechol, resorcinol and acetic acid. The kinetic parameters are calculated for this scheme. These data are important to evaluate the evolution of the concentration of the different polluting molecules during the process. A simplified kinetic scheme, which can be easily implemented in a process simulation, is also determined for the direct degradation of phenol into H2O and CO2. The Arrhenius law data obtained for the phenol disappearance are the following: k = 1.8 × 106 ± 3.9 × 105 M−1 s−1 (pre-exponential factor) and Ea = 77 ± 8 kJ mol−1 (activation energy).
Sébastien Lefèvre, Olivier Boutin, Jean-Henry Ferrasse, Laure Malleret, Rémy Faucherand, et al.. Thermodynamic and kinetic study of phenol degradation by a non-catalytic wet air oxidation process. Chemosphere, 2011, 84 (9), pp.1208-1215. ⟨10.1016/j.chemosphere.2011.05.049⟩. ⟨hal-01297674⟩
Sebastien Lefevre, Jean-Henry Ferrasse, Olivier Boutin, Michelle Sergent, Rémy Faucherand, et al.. Process optimisation using the combination of simulation and experimental design approach: Application to wet air oxidation. Chemical Engineering Research and Design, 2011, 89 (7), pp.1045-1055. ⟨10.1016/j.cherd.2010.12.009⟩. ⟨hal-01292658⟩ Plus de détails...
This study develops a coupling of energetic and experimental design approaches on a given configuration of wet air oxidation process (WAO), applied for wastewater containing a hard chemical oxygen demand (phenol for instance). Taking into account thermodynamic principles and process simulation, the calculation of minimum heat required by the process, exergetic efficiency and work balance is presented. Five parameters are considered: pressure (20–30 MPa); temperature (200–300 °C); chemical oxygen demand (23–143 g l−1); air ratio (1.2–2) and temperature of exiting steam utilities (160–200 °C). Using the surface response method, it appears that initial chemical oxygen demand and temperature are the two parameters that mainly influence the result. With the modelling, good conditions for the functioning of the presented process are the following: pressure of 19.4 MPa, temperature of 283 °C, chemical oxygen demand of 54.9 g l−1, air ratio of 1.7 and vapour temperature of 183 °C.
Sebastien Lefevre, Jean-Henry Ferrasse, Olivier Boutin, Michelle Sergent, Rémy Faucherand, et al.. Process optimisation using the combination of simulation and experimental design approach: Application to wet air oxidation. Chemical Engineering Research and Design, 2011, 89 (7), pp.1045-1055. ⟨10.1016/j.cherd.2010.12.009⟩. ⟨hal-01292658⟩
Diffusion coefficient is an important property in chemical industry and precise measurements can be achieved by electrochemical techniques. Study of ferrocene diffusion was carried out in 1-hexyl-3-methyl imidazolium hexafluorophosphate-dense CO2 ([C6MIM][PF6–CO2]) biphasic system using microelectrode technique. Diffusion coefficients were determined by cyclic voltammetry and Randles–Ševčík relationship in the temperature and pressure ranging from 303.15 to 333.15 K and 1–10 MPa, respectively. Computed phase simulations were also used. Two-phase system was determined whatever experimental conditions and composition tested. Volumes of heavy and light phase were estimated as well. Both electroanalytical and computed studies showed that [C6MIM][PF6]–CO2 biphasic system containing initial molar fraction of CO2 up to 0.9 can be used without decrease in diffusion coefficient values. The order of magnitude of these diffusion coefficients of ferrocene in greener aprotic media is about 10−6 m2 s−1. Theoretical analysis of ferrocene mass transport was also carried out using Sutherland formula and viscosity model based on Eyring's absolute rate theory. Dramatic decrease in [C6MIM][PF6]-CO2 mixture viscosity with x(CO2) was estimated by calculations.
Sébastien Chanfreau, Bing Yu, Liang-Nian He, Olivier Boutin. Electrochemical determination of ferrocene diffusion coefficient in [C6MIM][PF6]–CO2 biphasic system. Journal of Supercritical Fluids, 2011, 56 (2), pp.130-136. ⟨10.1016/j.supflu.2011.01.003⟩. ⟨hal-01297679⟩
Laurène Lesoin, Olivier Boutin, Christelle Crampon, Elisabeth Badens. CO2/water/surfactant ternary systems and liposome formation using supercritical CO2: a review. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2011, 377 (1-3), pp.1-14. ⟨10.1016/j.colsurfa.2011.01.027⟩. ⟨hal-01044546⟩ Plus de détails...
The aim of this review is to explain the various phenomena involved in liposome formation using dense gas processes and especially supercritical CO2. Before liposome formation, the review focuses on the phase behavior of CO2/water/surfactant ternary systems. First of all, the two main cases of CO2/water/surfactant fluid phase behavior are studied: reverse micelle systems and Winsor systems. Then, the various mechanisms of emulsion destabilization as a function of formulation variables (pressure, temperature and water content) are tackled. Influence of formulation variables is also addressed in the case of liposome formation during depressurization and CO2 release for dense gas techniques. Techniques using supercritical or subcritical conditions are classified according to the hydration way: in the first case, hydration is carried out under pressure and in the second one, hydration is achieved after depressurization. Hydration under pressure involves the formation of a CO2/water/surfactant system which is not the case when hydration is carried out during depressurization. An emergent tendency in liposome formation may be noted: (i) large unilamellar vesicles would appear when hydration is achieved under pressure, i.e. when liposomes are the result of two phase inversions (inversion phase from water-in-CO2 emulsion to CO2-in-water emulsion and inversion phase from CO2-in-water emulsion to liposomes); (ii) multilamellar vesicles would be formed when hydration is realized during depressurization, i.e. when liposomes are the result of one phase inversion (inversion phase from CO2-in-water to liposomes). Lastly, a model of liposome formation is developed.
Laurène Lesoin, Olivier Boutin, Christelle Crampon, Elisabeth Badens. CO2/water/surfactant ternary systems and liposome formation using supercritical CO2: a review. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2011, 377 (1-3), pp.1-14. ⟨10.1016/j.colsurfa.2011.01.027⟩. ⟨hal-01044546⟩
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Olivier Boutin, F. Charton, F. Fenoul. Extraction par eau subcritique. F. Chemat. Eco-extraction du vegetal, Dunod, pp.259--283, 2011. ⟨hal-01313538⟩ Plus de détails...
Laurène Lesoin, Christelle Crampon, Olivier Boutin, Elisabeth Badens. Preparation of liposomes using the supercritical anti-solvent (SAS) process and comparison with a conventional method. Journal of Supercritical Fluids, 2011, 57 (2), pp.162-174. ⟨10.1016/j.supflu.2011.01.006⟩. ⟨hal-01044553⟩ Plus de détails...
Two methods to produce liposomes encapsulating a fluorescent marker were compared: the supercritical anti-solvent (SAS) method and a conventional one (Bangham). Liposome size and encapsulation efficiency were measured to assess the methods. Micronized lecithin produced by the SAS process was characterized in terms of particle size, morphology and residual solvent content in order to investigate the influence of experimental parameters (pressure, CO2/solvent molar ratio and solute concentration). It appears that when the lecithin concentration increases from 15 to 25 wt.%, at 9 MPa and 308 K, larger (20-60 μm) and less aggregated lecithin particles are formed. As concerns liposomes formed from SAS processed lecithin, size distribution curves are mainly bimodal, spreading in the range of 0.1-100 μm. Liposome encapsulation efficiencies are including between 10 and 20%. As concerns the Bangham method, more dispersed liposomes were formed; encapsulation efficiencies were about 20%, and problems of reproducibility have been raised.
Laurène Lesoin, Christelle Crampon, Olivier Boutin, Elisabeth Badens. Preparation of liposomes using the supercritical anti-solvent (SAS) process and comparison with a conventional method. Journal of Supercritical Fluids, 2011, 57 (2), pp.162-174. ⟨10.1016/j.supflu.2011.01.006⟩. ⟨hal-01044553⟩
Christelle Crampon, Olivier Boutin, Elisabeth Badens. Supercritical carbon dioxide extraction of molecules of interest from microalgae and seaweeds. Industrial and engineering chemistry research, 2011, 50 (15), pp.8941-8953. ⟨10.1021/ie102297d⟩. ⟨hal-01044580⟩ Plus de détails...
The purpose of this paper is to guide lectors in the extraction of algal (microalgae and seaweeds) compounds using supercritical carbon dioxide (SC-CO2) from dry biomass. It proposes a review of 30 articles dealing with the SC-CO2 extraction of molecules of interest from microalgae and seaweeds. Among these papers, 20 are devoted to microalgae. The most extracted compounds are neutral lipids and antioxidants. Several operating conditions have been tested: pressures from 7.8 to 70 MPa, temperatures from 313.15 to 349.15 K, and CO2/algae mass ratio from 6 to 500. All extraction studies were performed at laboratory scale, with the masses of dry algae powder never exceeding 180 g. Extraction yields vary significantly with operating conditions: pressure seems to be the most influential parameter. The higher the pressure, the higher the yields and/or the faster the extraction kinetics. Temperature also has an influence, but its effect is dependent on pressure (retrograde behavior). Moreover, as expected, it is advised to work with a high CO2/algae mass ratio. From these works, it appears that, to perform an efficient extraction with SC-CO2, the influence of the algae pretreatment is highly significant. The first step is a centrifugation. The resulting concentrated algal suspension must then undergo a drying operation, which is generally freeze-drying or low-temperature drying. Finally, the algae are crushed. Concerning the influence of crushing, the reported results show that, as expected, the smaller the particles, the more rapid the extraction kinetics and/or the higher the yields.
Christelle Crampon, Olivier Boutin, Elisabeth Badens. Supercritical carbon dioxide extraction of molecules of interest from microalgae and seaweeds. Industrial and engineering chemistry research, 2011, 50 (15), pp.8941-8953. ⟨10.1021/ie102297d⟩. ⟨hal-01044580⟩
Journal: Industrial and engineering chemistry research
Olivier Boutin, Axel de Nadai, Antonio Garcia Perez, Jean-Henry Ferrasse, Marina Beltran, et al.. Experimental and modelling of supercritical oil extraction from rapeseeds and sunflower seeds. Chemical Engineering Research and Design, 2011, 89 (11), pp.2477-2484. ⟨10.1016/j.cherd.2011.02.032⟩. ⟨hal-01044569⟩ Plus de détails...
The supercritical oil extraction from oleaginous seeds (sunflower and rapeseeds) is presented here through experimental and modelling results. The experimental setup allows an accurate following of the mass of the oil extracted and to derive the experimental influences of pressure, temperature and supercritical CO2 flowrate on the extraction curves. These parameters are very sensitive and highlight the necessity of precise optimisation of experimental conditions. In order to complete the behaviour of supercritical fluids extraction, an improved modelling is proposed. The modelling basic equations are based on others modelling published previously. In this work, the determination of several parameters comes from correlations and the other constants are fitted with all the experimental results. Thus the modelling is more representative and predictive as other ones. The modelling results present a good agreement with the experimental results, and hence it can be used for the dimensioning of some extraction autoclaves.
Olivier Boutin, Axel de Nadai, Antonio Garcia Perez, Jean-Henry Ferrasse, Marina Beltran, et al.. Experimental and modelling of supercritical oil extraction from rapeseeds and sunflower seeds. Chemical Engineering Research and Design, 2011, 89 (11), pp.2477-2484. ⟨10.1016/j.cherd.2011.02.032⟩. ⟨hal-01044569⟩
Olivier Boutin, J.H. Ferrasse, S. Lefèvre. Procédés d’oxydation en voie humide. Weka. Techniques de l’Ingénieur, 6030, 2011. ⟨hal-01313537⟩ Plus de détails...
Laurène Lesoin, Christelle Crampon, Olivier Boutin, Elisabeth Badens. Development of a continuous dense gas process for the production of liposomes. Journal of Supercritical Fluids, 2011, 60, pp.51-62. ⟨10.1016/j.supflu.2011.04.018⟩. ⟨hal-01044574⟩ Plus de détails...
A new process called Continuous Anti-Solvent (CAS) process was developed for the production of liposomes using supercritical CO2. Unlike the current dense gas technologies, CAS method is a single step and continuous process. Preliminary experiments were conducted in semi-batch mode to determine the most suitable operating conditions (stirring speed = 225 rpm; water/lecithin mass ratio = 21) to ensure an efficient phase mixing in the autoclave. Then, two procedures were developed for the CAS process in the continuous mode. According to the results, the single exit procedure enhances the phase mixing in the autoclave with the formation of a CO2-in-water emulsion which is a good precursor to liposome formation. Liposomes prepared with the CAS method (P = 9 MPa; T = 308 K; CO2 flow rate = 0.3 kg h−1; organic solution flow rate = 240 mL h−1; water flow rate = 180 mL h−1) are spherical and multilamellar with a medium diameter included between 10 and 100 μm.
Laurène Lesoin, Christelle Crampon, Olivier Boutin, Elisabeth Badens. Development of a continuous dense gas process for the production of liposomes. Journal of Supercritical Fluids, 2011, 60, pp.51-62. ⟨10.1016/j.supflu.2011.04.018⟩. ⟨hal-01044574⟩
S. Lefèvre, J.H. Ferrasse, Rémy Faucherand, Alain Viand, Olivier Boutin. Energy Optimisation of Wet Air Oxidation Process Based on the Preliminary Study on Liquid-Vapour Equilibrium. Chemical Engineering Transactions, 2010, 21, pp.835-840. ⟨10.3303/CET1021140⟩. ⟨hal-01300396⟩ Plus de détails...
Wet air oxidation process is used to treat wastewater with high chemical oxygen demand. Temperatures up to 350°C and pressures up to 30 MPa, are operated to develop a non-catalytic process. In the literature, there is some data about the phase equilibrium of water-air system but on larger domains and not accurate enough in our range. To study the process, it is necessary to complete the data with adapted pressures, temperatures and compositions. An experimental set-up has been developed to realise equilibrium measurements as well as trials on waste degradation. It consists of a stirred reactor of 150 mL equipped with two sapphire windows (diameter 4.1 cm) allowing a total visualization of the reactive chamber. The results of experiments give the volume occupied by the liquid and the gas phases, for a combination of temperature, pressure and global composition. Measurements are realised to establish dew curves for water-air, water-nitrogen and water-waste-nitrogen systems. Nitrogen has the same behaviour as oxygen and can replace it in mixtures for the phases equilibrium studies with the waste to avoid any reaction. The presence of the waste, in the concentrations studied, has no significant influence on the equilibrium points. Those data serve to model the liquid-vapour equilibrium in the appropriate domain first with an ideal model and then with equation of state Soave-Redlich-Kwong and appropriate mixing rules. Those equilibrium models are then included in commercial engineering software to simulate WAO processes. With the objective to develop a process energetically optimised, the second part of this work is dedicated to perform energy balances for each component and for the whole process
S. Lefèvre, J.H. Ferrasse, Rémy Faucherand, Alain Viand, Olivier Boutin. Energy Optimisation of Wet Air Oxidation Process Based on the Preliminary Study on Liquid-Vapour Equilibrium. Chemical Engineering Transactions, 2010, 21, pp.835-840. ⟨10.3303/CET1021140⟩. ⟨hal-01300396⟩
A. Leybros, A. Roubaud, Pierrette Guichardon, Olivier Boutin. Supercritical water oxidation of ion exchange resins: degradation mechanisms. Process Safety and Environmental Protection, 2010, 88 (3), pp.213-222. ⟨10.1016/j.psep.2009.11.001⟩. ⟨hal-01025162⟩ Plus de détails...
Spent ion exchange resins are radioactive process wastes for which there is no satisfactory industrial treatment. Supercritical water oxidation could offer a viable treatment alternative to destroy the organic structure of resins and contain radioactivity. IER degradation experiments were carried out in a continuous supercritical water reactor. Total organic carbon degradation rates in the range of 95-98% were obtained depending on operating conditions. GC-MS chromatography analyses were carried out to determine intermediate products formed during the reaction. Around 50 species were identified for cationic and anionic resins. Degradation of polystyrenic structure leads to the formation of low molecular weight compounds. Benzoic acid, phenol and acetic acid are the main compounds. However, other products are detected in appreciable yields such as phenolic species or heterocycles, for anionic IERs degradation. Intermediates produced by intramolecular rearrangements are also obtained. A radical degradation mechanism is proposed for each resin. In this overall mechanism, several hypotheses are foreseen, according to HOOradical dot radical attack sites.
A. Leybros, A. Roubaud, Pierrette Guichardon, Olivier Boutin. Supercritical water oxidation of ion exchange resins: degradation mechanisms. Process Safety and Environmental Protection, 2010, 88 (3), pp.213-222. ⟨10.1016/j.psep.2009.11.001⟩. ⟨hal-01025162⟩
Journal: Process Safety and Environmental Protection
A. Leybros, A. Roubaud, Pierrette Guichardon, Olivier Boutin. Ion exchange resins destruction in a stirred supercritical water oxidation reactor. Journal of Supercritical Fluids, 2010, 51 (3), pp.369-375. ⟨10.1016/j.supflu.2009.08.017⟩. ⟨hal-01025175⟩ Plus de détails...
Spent ion exchange resins (IERs) are radioactive process wastes for which there is no satisfactory industrial treatment. Supercritical water oxidation offers a viable treatment alternative to destroy the organic structure of resins, used to remove radioactivity. Up to now, studies carried out in supercritical water for IER destruction showed that degradation rates higher than 99% are difficult to obtain even using a catalyst or a large oxidant excess. In this study, a co-fuel, isopropanol, has been used in order to improve degradation rates by initiating the oxidation reaction and increasing temperature of the reaction medium. Concentrations up to 20 wt% were tested for anionic and cationic resins. Total organic carbon reduction rates higher than 99% were obtained from this process, without the use of a catalyst. The influence of operating parameters such as IERs feed concentration, nature and counterions of exchanged IERs were also studied.
A. Leybros, A. Roubaud, Pierrette Guichardon, Olivier Boutin. Ion exchange resins destruction in a stirred supercritical water oxidation reactor. Journal of Supercritical Fluids, 2010, 51 (3), pp.369-375. ⟨10.1016/j.supflu.2009.08.017⟩. ⟨hal-01025175⟩
B Calvignac, Olivier Boutin. The impinging jets technology: A contacting device using a SAS process type. Powder Technology, 2008, 191, pp.200 - 205. ⟨10.1016/j.powtec.2008.10.009⟩. ⟨hal-03505780⟩ Plus de détails...
Supercritical CO 2 can be used as anti-solvent in many processes. It permits to micronize molecules dissolved in an appropriate organic solvent. In this work, Griseofulvin has been chosen as solute to be micronized using a Supercritical Anti-Solvent process type. The aim is to validate and compare a new mixing device based on the impinging jets technology. This technique consists of arranging two jets in face to face position in order to generate a zone of high turbulence and favour the mass transfer. Experiments have been conducted at 10 MPa and 313 K. Injection velocities have been varied from 0.7 to 13 m s − 1 and the geometric factor from 4 to 27. This work permits to bring to the fore the significant influence of operating parameters and geometric parameters of the impinging jets device, (jets velocity, impinging distance, organic solvent, solute concentration) on particle size and particle size distribution. Compared to traditional SAS process, this device allows a significant reduction on particles size from few millimetres to 10 μm. The use of this new device seems to have a significant interest.
B Calvignac, Olivier Boutin. The impinging jets technology: A contacting device using a SAS process type. Powder Technology, 2008, 191, pp.200 - 205. ⟨10.1016/j.powtec.2008.10.009⟩. ⟨hal-03505780⟩
S. Moussiere, C. Joussot-Dubien, P. Guichardon, Olivier Boutin, H.-A. Turc, et al.. Modelling of heat transfer and hydrodynamic with two kinetics approaches during supercritical water oxidation process. Journal of Supercritical Fluids, 2007, 43 (2), pp.324-332. ⟨10.1016/j.supflu.2007.06.008⟩. ⟨cea-02512107⟩ Plus de détails...
Supercritical water oxidation is an innovative and very efficient process to treat hazardous organic waste. In order to better understand the complex physic phenomena involved in this process, and to design more efficient reactors or to insure future efficient scale-up, a simulation with the Computational Fluid Dynamics software FLUENT was carried out for a simple tubular reactor. The turbulent non-reactive flow is well-represented using the $\kappa-\epsilon$ model. Nevertheless, the $\kappa-\epsilon$ model gives better results when a source term is added to take into account the chemical reaction. Two approaches are used to model the reaction rate: an Arrhenius law and the Eddy Dissipation Concept (EDC) generally used to describe combustion reactions. The results of this simulation using Arrhenius law, are in good agreement with experimental data although a simple thermohydraulic model was used. Moreover, the sensitiveness to the inlet temperature has been demonstrated. It influences the reaction start-up and the shape of the measured wall temperature peak. Equally, the simulated temperature profiles using Eddy Dissipation Concept model are in good agreement with experimental ones. Hence, the two approaches give similar results. Nevertheless, the EDC model predicts more precisely the thermal peak location at the reactor wall.
S. Moussiere, C. Joussot-Dubien, P. Guichardon, Olivier Boutin, H.-A. Turc, et al.. Modelling of heat transfer and hydrodynamic with two kinetics approaches during supercritical water oxidation process. Journal of Supercritical Fluids, 2007, 43 (2), pp.324-332. ⟨10.1016/j.supflu.2007.06.008⟩. ⟨cea-02512107⟩
