The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
Stéphane Déchelotte - One of the best experts on this subject based on the ideXlab platform.
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Recovery comparisons--hot nitrogen Vs steam regeneration of toxic dichloromethane from Activated Carbon Beds in oil sands process.
Journal of Hazardous Materials, 2012Co-Authors: Shivaji G Ramalingam, Pascaline Pré, Sylvain Giraudet, Laurent Le Coq, Pierre Le Cloirec, Olivier Baudouin, Stéphane DéchelotteAbstract:The regeneration experiments of dichloromethane from Activated Carbon Bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of the nitrogen to achieve maximum regeneration at an optimized operating cost. All the experimental results of adsorption step, hot nitrogen and steam regeneration step had been validated by the simulation model PROSIM. The average error percentage between the simulation and experiment based on the mass of adsorption of dichloromethane was 2.6%. The average error percentages between the simulations and experiments based on the mass of dichloromethane regenerated by nitrogen regeneration and steam regeneration were 3 and 12%, respectively. From the experiments, it had been shown that both the hot nitrogen and steam regeneration had regenerated 84% of dichloromethane. But the choice of hot nitrogen or steam regeneration depends on the regeneration time, operating costs, and purity of dichloromethane regenerated. A thorough investigation had been made about the advantages and limitations of both the hot nitrogen and steam regeneration of dichloromethane.
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Recovery comparisons—Hot nitrogen Vs steam regeneration of toxic dichloromethane from Activated Carbon Beds in oil sands process
Journal of Hazardous Materials, 2012Co-Authors: Shivaji G Ramalingam, Sylvain Giraudet, Pierre Le Cloirec, Olivier Baudouin, Stéphane DéchelotteAbstract:The regeneration experiments of dichloromethane from Activated Carbon Bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of the nitrogen to achieve maximum regeneration at an optimized operating cost. All the experimental results of adsorption step, hot nitrogen and steam regeneration step had been validated by the simulation model PROSIM. The average error percentage between the simulation and experiment based on the mass of adsorption of dichloromethane was 2.6%. The average error percentages between the simulations and experiments based on the mass of dichloromethane regenerated by nitrogen regeneration and steam regeneration were 3 and 12%, respectively. From the experiments, it had been shown that both the hot nitrogen and steam regeneration had regenerated 84% of dichloromethane. But the choice of hot nitrogen or steam regeneration depends on the regeneration time, operating costs, and purity of dichloromethane regenerated. A thorough investigation had been made about the advantages and limitations of both the hot nitrogen and steam regeneration of dichloromethane.
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Hazardous dichloromethane recovery in combined temperature and vacuum pressure swing adsorption process.
Journal of Hazardous Materials, 2011Co-Authors: Shivaji Ganesan Ramalingam, Pascaline Pré, Sylvain Giraudet, Pierre Le Cloirec, Olivier Baudouin, Stéphane Déchelotte, Jerôme Saussac, Laurence Le Coq, Serge Nicolas, Alice MedevielleAbstract:Organic vapors emitted from solvents used in chemical and pharmaceutical processes, or from hydroCarbon fuel storage stations at oil terminals, can be efficiently captured by adsorption onto Activated Carbon Beds. To recover vapors after the adsorption step, two modes of regeneration were selected and could be possibly combined: thermal desorption by hot nitrogen flow and vacuum depressurization (VTSA). Because of ignition risks, the conditions in which the Beds operate during the adsorption and regeneration steps need to be strictly controlled, as well as optimized to maintain good performances. In this work, the optimal conditions to be applied during the desorption step were determined from factorial experimental design (FED), and validated from the process simulation results. The regeneration performances were compared in terms of Bed regeneration rate, concentration of recovered volatile organic compounds (VOC) and operating costs. As an example, this methodology was applied in case of dichloromethane. It has been shown that the combination of thermal and vacuum regeneration allows reaching 82% recovery of dichloromethane. Moreover, the vacuum desorption ended up in cooling the Activated Carbon Bed from 93°C to 63°C and so that it significantly reduces the cooling time before starting a new cycle.
Pierre Le Cloirec - One of the best experts on this subject based on the ideXlab platform.
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Recovery comparisons--hot nitrogen Vs steam regeneration of toxic dichloromethane from Activated Carbon Beds in oil sands process.
Journal of Hazardous Materials, 2012Co-Authors: Shivaji G Ramalingam, Pascaline Pré, Sylvain Giraudet, Laurent Le Coq, Pierre Le Cloirec, Olivier Baudouin, Stéphane DéchelotteAbstract:The regeneration experiments of dichloromethane from Activated Carbon Bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of the nitrogen to achieve maximum regeneration at an optimized operating cost. All the experimental results of adsorption step, hot nitrogen and steam regeneration step had been validated by the simulation model PROSIM. The average error percentage between the simulation and experiment based on the mass of adsorption of dichloromethane was 2.6%. The average error percentages between the simulations and experiments based on the mass of dichloromethane regenerated by nitrogen regeneration and steam regeneration were 3 and 12%, respectively. From the experiments, it had been shown that both the hot nitrogen and steam regeneration had regenerated 84% of dichloromethane. But the choice of hot nitrogen or steam regeneration depends on the regeneration time, operating costs, and purity of dichloromethane regenerated. A thorough investigation had been made about the advantages and limitations of both the hot nitrogen and steam regeneration of dichloromethane.
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Recovery comparisons—Hot nitrogen Vs steam regeneration of toxic dichloromethane from Activated Carbon Beds in oil sands process
Journal of Hazardous Materials, 2012Co-Authors: Shivaji G Ramalingam, Sylvain Giraudet, Pierre Le Cloirec, Olivier Baudouin, Stéphane DéchelotteAbstract:The regeneration experiments of dichloromethane from Activated Carbon Bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of the nitrogen to achieve maximum regeneration at an optimized operating cost. All the experimental results of adsorption step, hot nitrogen and steam regeneration step had been validated by the simulation model PROSIM. The average error percentage between the simulation and experiment based on the mass of adsorption of dichloromethane was 2.6%. The average error percentages between the simulations and experiments based on the mass of dichloromethane regenerated by nitrogen regeneration and steam regeneration were 3 and 12%, respectively. From the experiments, it had been shown that both the hot nitrogen and steam regeneration had regenerated 84% of dichloromethane. But the choice of hot nitrogen or steam regeneration depends on the regeneration time, operating costs, and purity of dichloromethane regenerated. A thorough investigation had been made about the advantages and limitations of both the hot nitrogen and steam regeneration of dichloromethane.
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Hazardous dichloromethane recovery in combined temperature and vacuum pressure swing adsorption process.
Journal of Hazardous Materials, 2011Co-Authors: Shivaji Ganesan Ramalingam, Pascaline Pré, Sylvain Giraudet, Pierre Le Cloirec, Olivier Baudouin, Stéphane Déchelotte, Jerôme Saussac, Laurence Le Coq, Serge Nicolas, Alice MedevielleAbstract:Organic vapors emitted from solvents used in chemical and pharmaceutical processes, or from hydroCarbon fuel storage stations at oil terminals, can be efficiently captured by adsorption onto Activated Carbon Beds. To recover vapors after the adsorption step, two modes of regeneration were selected and could be possibly combined: thermal desorption by hot nitrogen flow and vacuum depressurization (VTSA). Because of ignition risks, the conditions in which the Beds operate during the adsorption and regeneration steps need to be strictly controlled, as well as optimized to maintain good performances. In this work, the optimal conditions to be applied during the desorption step were determined from factorial experimental design (FED), and validated from the process simulation results. The regeneration performances were compared in terms of Bed regeneration rate, concentration of recovered volatile organic compounds (VOC) and operating costs. As an example, this methodology was applied in case of dichloromethane. It has been shown that the combination of thermal and vacuum regeneration allows reaching 82% recovery of dichloromethane. Moreover, the vacuum desorption ended up in cooling the Activated Carbon Bed from 93°C to 63°C and so that it significantly reduces the cooling time before starting a new cycle.
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A Model To Predict the Adsorber Thermal Behavior during Treatment of Volatile Organic Compounds onto Wet Activated Carbon
Environmental Science & Technology, 2002Co-Authors: Frédéric Delage, Pierre Le CloirecAbstract:A model for adsorption of volatile organic compounds (VOCs) onto a wet Activated Carbon Bed was proposed in this study. This model accounts for temperature changes induced by the reversed and coupled mass-transfer processes of both organic species adsorption and water desorption. Indeed, it was experimentally pointed out that temperature rises, which result from the exothermal nature of the energetic interactions between the organic molecule and the Activated Carbon surface, are notably reduced when the adsorbent contains an initial moisture of approximately 10% in weight. Moreover, it was shown that water rate desorption was enhanced in the presence of organic vapor. This phenomenon may be explained by the displacement of sorBed water bythe organic molecules, owing to more intensive interactions with the Activated Carbon surface. The model proposed was elaborated from a previous comprehensive analysis of the diffusion mechanisms governing VOC adsorption at high concentrations onto a dry Activated Carbon Bed. In a similar way, a theoretical approach was developed to model water desorption during drying of a wet Activated Carbon Bed under pure flowing air. At last, a theoretical depiction of both competitive and reverse processes was outlined. The final model fits reasonably with experimental data relative to both breakthrough curves and thermal wave shape along the Bed, even if local temperature change calculation may require some further improvement.
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Mass Transfer and Warming during Adsorption of High Concentrations of VOCs on an Activated Carbon Bed: Experimental and Theoretical Analysis
Environmental Science & Technology, 2000Co-Authors: Frédéric Delage, Pierre Le CloirecAbstract:An experimental and theoretical study was carried out to predict the warming and the mass-transfer rate during adsorption of high concentrations of volatile organic compounds (VOCs) in an Activated Carbon Bed. A linear driving force (LDF) model is found to provide an acceptable fit to the measured data. An empirical correlation of the mass transfer rate is proposed as a function of the strength of adsorbent−adsorbate interactions and the gas velocity to design the adsorption process without using any adjustable parameter. The model was validated for an adsorption unit with high loadings (up to 100 g.m-3) of seven kinds of VOC and within the velocity range 0.139−0.556 m.s-1. The prediction of the temperature rise inside the adsorber is improved by the use of the differential heat of adsorption instead of the integral heat. A theoretical parameter sensitivity test indicates that the temperature rise is strongly dependent on the molar VOC concentration, the adsorption heat, and the volumetric heat capacity o...
Sylvain Giraudet - One of the best experts on this subject based on the ideXlab platform.
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Recovery comparisons--hot nitrogen Vs steam regeneration of toxic dichloromethane from Activated Carbon Beds in oil sands process.
Journal of Hazardous Materials, 2012Co-Authors: Shivaji G Ramalingam, Pascaline Pré, Sylvain Giraudet, Laurent Le Coq, Pierre Le Cloirec, Olivier Baudouin, Stéphane DéchelotteAbstract:The regeneration experiments of dichloromethane from Activated Carbon Bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of the nitrogen to achieve maximum regeneration at an optimized operating cost. All the experimental results of adsorption step, hot nitrogen and steam regeneration step had been validated by the simulation model PROSIM. The average error percentage between the simulation and experiment based on the mass of adsorption of dichloromethane was 2.6%. The average error percentages between the simulations and experiments based on the mass of dichloromethane regenerated by nitrogen regeneration and steam regeneration were 3 and 12%, respectively. From the experiments, it had been shown that both the hot nitrogen and steam regeneration had regenerated 84% of dichloromethane. But the choice of hot nitrogen or steam regeneration depends on the regeneration time, operating costs, and purity of dichloromethane regenerated. A thorough investigation had been made about the advantages and limitations of both the hot nitrogen and steam regeneration of dichloromethane.
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Recovery comparisons—Hot nitrogen Vs steam regeneration of toxic dichloromethane from Activated Carbon Beds in oil sands process
Journal of Hazardous Materials, 2012Co-Authors: Shivaji G Ramalingam, Sylvain Giraudet, Pierre Le Cloirec, Olivier Baudouin, Stéphane DéchelotteAbstract:The regeneration experiments of dichloromethane from Activated Carbon Bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of the nitrogen to achieve maximum regeneration at an optimized operating cost. All the experimental results of adsorption step, hot nitrogen and steam regeneration step had been validated by the simulation model PROSIM. The average error percentage between the simulation and experiment based on the mass of adsorption of dichloromethane was 2.6%. The average error percentages between the simulations and experiments based on the mass of dichloromethane regenerated by nitrogen regeneration and steam regeneration were 3 and 12%, respectively. From the experiments, it had been shown that both the hot nitrogen and steam regeneration had regenerated 84% of dichloromethane. But the choice of hot nitrogen or steam regeneration depends on the regeneration time, operating costs, and purity of dichloromethane regenerated. A thorough investigation had been made about the advantages and limitations of both the hot nitrogen and steam regeneration of dichloromethane.
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Hazardous dichloromethane recovery in combined temperature and vacuum pressure swing adsorption process.
Journal of Hazardous Materials, 2011Co-Authors: Shivaji Ganesan Ramalingam, Pascaline Pré, Sylvain Giraudet, Pierre Le Cloirec, Olivier Baudouin, Stéphane Déchelotte, Jerôme Saussac, Laurence Le Coq, Serge Nicolas, Alice MedevielleAbstract:Organic vapors emitted from solvents used in chemical and pharmaceutical processes, or from hydroCarbon fuel storage stations at oil terminals, can be efficiently captured by adsorption onto Activated Carbon Beds. To recover vapors after the adsorption step, two modes of regeneration were selected and could be possibly combined: thermal desorption by hot nitrogen flow and vacuum depressurization (VTSA). Because of ignition risks, the conditions in which the Beds operate during the adsorption and regeneration steps need to be strictly controlled, as well as optimized to maintain good performances. In this work, the optimal conditions to be applied during the desorption step were determined from factorial experimental design (FED), and validated from the process simulation results. The regeneration performances were compared in terms of Bed regeneration rate, concentration of recovered volatile organic compounds (VOC) and operating costs. As an example, this methodology was applied in case of dichloromethane. It has been shown that the combination of thermal and vacuum regeneration allows reaching 82% recovery of dichloromethane. Moreover, the vacuum desorption ended up in cooling the Activated Carbon Bed from 93°C to 63°C and so that it significantly reduces the cooling time before starting a new cycle.
Olivier Baudouin - One of the best experts on this subject based on the ideXlab platform.
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Recovery comparisons--hot nitrogen Vs steam regeneration of toxic dichloromethane from Activated Carbon Beds in oil sands process.
Journal of Hazardous Materials, 2012Co-Authors: Shivaji G Ramalingam, Pascaline Pré, Sylvain Giraudet, Laurent Le Coq, Pierre Le Cloirec, Olivier Baudouin, Stéphane DéchelotteAbstract:The regeneration experiments of dichloromethane from Activated Carbon Bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of the nitrogen to achieve maximum regeneration at an optimized operating cost. All the experimental results of adsorption step, hot nitrogen and steam regeneration step had been validated by the simulation model PROSIM. The average error percentage between the simulation and experiment based on the mass of adsorption of dichloromethane was 2.6%. The average error percentages between the simulations and experiments based on the mass of dichloromethane regenerated by nitrogen regeneration and steam regeneration were 3 and 12%, respectively. From the experiments, it had been shown that both the hot nitrogen and steam regeneration had regenerated 84% of dichloromethane. But the choice of hot nitrogen or steam regeneration depends on the regeneration time, operating costs, and purity of dichloromethane regenerated. A thorough investigation had been made about the advantages and limitations of both the hot nitrogen and steam regeneration of dichloromethane.
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Recovery comparisons—Hot nitrogen Vs steam regeneration of toxic dichloromethane from Activated Carbon Beds in oil sands process
Journal of Hazardous Materials, 2012Co-Authors: Shivaji G Ramalingam, Sylvain Giraudet, Pierre Le Cloirec, Olivier Baudouin, Stéphane DéchelotteAbstract:The regeneration experiments of dichloromethane from Activated Carbon Bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of the nitrogen to achieve maximum regeneration at an optimized operating cost. All the experimental results of adsorption step, hot nitrogen and steam regeneration step had been validated by the simulation model PROSIM. The average error percentage between the simulation and experiment based on the mass of adsorption of dichloromethane was 2.6%. The average error percentages between the simulations and experiments based on the mass of dichloromethane regenerated by nitrogen regeneration and steam regeneration were 3 and 12%, respectively. From the experiments, it had been shown that both the hot nitrogen and steam regeneration had regenerated 84% of dichloromethane. But the choice of hot nitrogen or steam regeneration depends on the regeneration time, operating costs, and purity of dichloromethane regenerated. A thorough investigation had been made about the advantages and limitations of both the hot nitrogen and steam regeneration of dichloromethane.
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Hazardous dichloromethane recovery in combined temperature and vacuum pressure swing adsorption process.
Journal of Hazardous Materials, 2011Co-Authors: Shivaji Ganesan Ramalingam, Pascaline Pré, Sylvain Giraudet, Pierre Le Cloirec, Olivier Baudouin, Stéphane Déchelotte, Jerôme Saussac, Laurence Le Coq, Serge Nicolas, Alice MedevielleAbstract:Organic vapors emitted from solvents used in chemical and pharmaceutical processes, or from hydroCarbon fuel storage stations at oil terminals, can be efficiently captured by adsorption onto Activated Carbon Beds. To recover vapors after the adsorption step, two modes of regeneration were selected and could be possibly combined: thermal desorption by hot nitrogen flow and vacuum depressurization (VTSA). Because of ignition risks, the conditions in which the Beds operate during the adsorption and regeneration steps need to be strictly controlled, as well as optimized to maintain good performances. In this work, the optimal conditions to be applied during the desorption step were determined from factorial experimental design (FED), and validated from the process simulation results. The regeneration performances were compared in terms of Bed regeneration rate, concentration of recovered volatile organic compounds (VOC) and operating costs. As an example, this methodology was applied in case of dichloromethane. It has been shown that the combination of thermal and vacuum regeneration allows reaching 82% recovery of dichloromethane. Moreover, the vacuum desorption ended up in cooling the Activated Carbon Bed from 93°C to 63°C and so that it significantly reduces the cooling time before starting a new cycle.
Shivaji G Ramalingam - One of the best experts on this subject based on the ideXlab platform.
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Recovery comparisons--hot nitrogen Vs steam regeneration of toxic dichloromethane from Activated Carbon Beds in oil sands process.
Journal of Hazardous Materials, 2012Co-Authors: Shivaji G Ramalingam, Pascaline Pré, Sylvain Giraudet, Laurent Le Coq, Pierre Le Cloirec, Olivier Baudouin, Stéphane DéchelotteAbstract:The regeneration experiments of dichloromethane from Activated Carbon Bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of the nitrogen to achieve maximum regeneration at an optimized operating cost. All the experimental results of adsorption step, hot nitrogen and steam regeneration step had been validated by the simulation model PROSIM. The average error percentage between the simulation and experiment based on the mass of adsorption of dichloromethane was 2.6%. The average error percentages between the simulations and experiments based on the mass of dichloromethane regenerated by nitrogen regeneration and steam regeneration were 3 and 12%, respectively. From the experiments, it had been shown that both the hot nitrogen and steam regeneration had regenerated 84% of dichloromethane. But the choice of hot nitrogen or steam regeneration depends on the regeneration time, operating costs, and purity of dichloromethane regenerated. A thorough investigation had been made about the advantages and limitations of both the hot nitrogen and steam regeneration of dichloromethane.
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Recovery comparisons—Hot nitrogen Vs steam regeneration of toxic dichloromethane from Activated Carbon Beds in oil sands process
Journal of Hazardous Materials, 2012Co-Authors: Shivaji G Ramalingam, Sylvain Giraudet, Pierre Le Cloirec, Olivier Baudouin, Stéphane DéchelotteAbstract:The regeneration experiments of dichloromethane from Activated Carbon Bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of the nitrogen to achieve maximum regeneration at an optimized operating cost. All the experimental results of adsorption step, hot nitrogen and steam regeneration step had been validated by the simulation model PROSIM. The average error percentage between the simulation and experiment based on the mass of adsorption of dichloromethane was 2.6%. The average error percentages between the simulations and experiments based on the mass of dichloromethane regenerated by nitrogen regeneration and steam regeneration were 3 and 12%, respectively. From the experiments, it had been shown that both the hot nitrogen and steam regeneration had regenerated 84% of dichloromethane. But the choice of hot nitrogen or steam regeneration depends on the regeneration time, operating costs, and purity of dichloromethane regenerated. A thorough investigation had been made about the advantages and limitations of both the hot nitrogen and steam regeneration of dichloromethane.
