The Experts below are selected from a list of 16293 Experts worldwide ranked by ideXlab platform
Paul Feron - One of the best experts on this subject based on the ideXlab platform.
-
Amino Acid Salts for co2 capture at flue gas temperatures
Chemical Engineering Science, 2014Co-Authors: Graeme Puxty, Paul FeronAbstract:Abstract The Amino Acid Salt potassium taurate has potential for use as a high-temperature absorbent for post-combustion CO 2 capture, because of its low volatility and high absorption rate. In this study, the densities and viscosities of 2–6 M taurate solution were determined over the temperature range of 293–353 K. We found that the CO 2 solubility of taurate solutions, measured using a stirred-cell reactor, is comparable to that of alkanolamines at high temperatures. The absorption rate of CO 2 into CO 2 -free and CO 2 -loaded taurate solutions was determined using a wetted-wall column. The K G of 4 M taurate at 353 K is similar in magnitude to the K G of 7 m monoethanolamine (MEA) at 313 K. We also found that the K G of taurate decreased with increased CO2 loading, although the K G values of taurate solutions are still comparable to CO 2 -loaded 7 m MEA solution. The reaction rate constant of taurate carbamate formation in this work agrees well with published values.
-
equilibrium solubility of co2 in aqueous potassium taurate solutions part 2 experimental vle data and model
Industrial & Engineering Chemistry Research, 2003Co-Authors: Paramasivam Senthil Kumar, J A Hogendoorn, Paul Feron, S J Timmer, Geert VersteegAbstract:The solubility of CO2 in aqueous potassium taurate solutions was measured at 298 and 313 K. Crystallization of the protonated amine (one of the reaction products) was observed during the absorption of CO2 in concentrated Amino Acid Salt solutions. The influence of crystallization on the equilibrium CO2 absorption capacity of the Amino Acid Salt solution was investigated. The difference in the thermodynamic characteristics of the aqueous Amino Acid Salt solution and aqueous alkanolamines is discussed using the Deshmukh−Mather model (Deshmukh, R. D.; Mather, A. E. Chem. Eng. Sci. 1981, 36, 355). Because of a limited change in the ionic strength of the solution in the range of the measured CO2 loading, a simplified model similar to the one proposed by Kent and Eisenberg (Kent, R.; Eisenberg, B. Hydrocarbon Process. 1976, 55, 87) is used to interpret the solubility data. In addition, the equilibrium constant of the carbamate hydrolysis reaction was experimentally measured for monoethanolamine and the potassiu...
-
equilibrium solubility of co2 in aqueous potassium taurate solutions part 1 crystallization in carbon dioxide loaded aqueous Salt solutions of Amino Acids
Industrial & Engineering Chemistry Research, 2003Co-Authors: Paramasivam Senthil Kumar, J A Hogendoorn, Paul Feron, Geert VersteegAbstract:Crystallization of a reaction product was observed during the absorption of CO2 in aqueous potassium taurate solutions at 298 K. The crystallizing solid was found to be the protonated amine. The critical CO2 loading value at which crystallization occurred was measured for various Amino Acid Salt concentrations. A simple relation between the critical CO2 loading value, initial Amino Acid Salt concentration, and solubility of the Amino Acid in water is established. This relation seems to hold well in predicting the critical CO2 loading value for Salts of Amino Acids other than taurine, for which Hook (Ind. Eng. Chem. Res. 1997, 36, 1779) has recently published some qualitative experimental data. The influence of the formation of the solid reaction product during the absorption of CO2 in aqueous potassium taurate solutions on the mass-transfer characteristics of a gas−liquid contactor was investigated semiquantitatively for a stirred reactor. In particular, the effect of the presence and absence of crystals ...
-
kinetics of the reaction of co2 with aqueous potassium Salt of taurine and glycine
Aiche Journal, 2003Co-Authors: Paramasivam Senthil Kumar, J A Hogendoorn, Geert Versteeg, Paul FeronAbstract:The kinetics of the reaction between CO2 and aqueous potassium Salts of taurine and glycine was measured at 295 K in a stirred-cell reactor with a flat gas-liquid interface. For aqueous potassium taurate solutions, the temperature effect on the reaction kinetics was measured at 285 and 305 K. Unlike aqueous primary alkanolamines, the partial reaction order in Amino Acid Salt changes from one at low Salt concentration to approximately 1.5 at Salt concentrations as high as 3,000 mol·m-3. At low Salt concentrations, the measured apparent rate constant (kapp) for potassium glycinate is comparable to the values in literature. In the absence of reliable information in the literature on the kinetics and mechanism of the reaction, the applicability of the zwitterion and termolecular mechanism (proposed originally for alkanolamines) was explored. For the zwitterion mechanism, the forward second-order reaction rate constant (k2) of the CO2 reaction with Amino Acid Salt seems to be much higher than for alkanolamines of similar basicity, indicating that the Bronsted plot for Amino Acid Salts might differ from that of alkanolamines. The contribution of water to the deprotonation of zwitterion seems to be more significant than reported values for aqueous secondary alkanolamines.
-
new absorption liquids for the removal of co2 from dilute gas streams using membrane contactors
Chemical Engineering Science, 2002Co-Authors: Paramasivam Senthil Kumar, J A Hogendoorn, Paul Feron, Geert VersteegAbstract:A new absorption liquid based on Amino Acid Salts has been studied for CO2 removal in membrane gas–liquid contactors. Unlike conventional gas treating solvents like aqueous alkanolamines solutions, the new absorption liquid does not wet polyolefin microporous membranes. The wetting characteristics of aqueous alkanolamines and Amino Acid Salt solutions for a hydrophobic membrane was studied by measuring the surface tension of the liquid and the breakthrough pressure of the liquid into the pores of the membrane. The dependence of the breakthrough pressure on surface tension follows the Laplace–Young equation. The performance of the new absorption liquid in the removal of CO2 was studied in a single fiber membrane contactor over a wide range of partial pressures of CO2 in the gas phase and Amino Acid Salt concentrations in the liquid. A numerical model to describe the mass transfer accompanied by multiple chemical reactions occurring during the absorption of CO2 in the liquid flowing through the hollow fiber was developed. The numerical model gives a good prediction of the CO2 absorption flux across the membrane for the absorption of CO2 in the aqueous Amino Acid Salt solutions flowing through the hollow fiber.
Geert Versteeg - One of the best experts on this subject based on the ideXlab platform.
-
equilibrium solubility of co2 in aqueous potassium taurate solutions part 2 experimental vle data and model
Industrial & Engineering Chemistry Research, 2003Co-Authors: Paramasivam Senthil Kumar, J A Hogendoorn, Paul Feron, S J Timmer, Geert VersteegAbstract:The solubility of CO2 in aqueous potassium taurate solutions was measured at 298 and 313 K. Crystallization of the protonated amine (one of the reaction products) was observed during the absorption of CO2 in concentrated Amino Acid Salt solutions. The influence of crystallization on the equilibrium CO2 absorption capacity of the Amino Acid Salt solution was investigated. The difference in the thermodynamic characteristics of the aqueous Amino Acid Salt solution and aqueous alkanolamines is discussed using the Deshmukh−Mather model (Deshmukh, R. D.; Mather, A. E. Chem. Eng. Sci. 1981, 36, 355). Because of a limited change in the ionic strength of the solution in the range of the measured CO2 loading, a simplified model similar to the one proposed by Kent and Eisenberg (Kent, R.; Eisenberg, B. Hydrocarbon Process. 1976, 55, 87) is used to interpret the solubility data. In addition, the equilibrium constant of the carbamate hydrolysis reaction was experimentally measured for monoethanolamine and the potassiu...
-
equilibrium solubility of co2 in aqueous potassium taurate solutions part 1 crystallization in carbon dioxide loaded aqueous Salt solutions of Amino Acids
Industrial & Engineering Chemistry Research, 2003Co-Authors: Paramasivam Senthil Kumar, J A Hogendoorn, Paul Feron, Geert VersteegAbstract:Crystallization of a reaction product was observed during the absorption of CO2 in aqueous potassium taurate solutions at 298 K. The crystallizing solid was found to be the protonated amine. The critical CO2 loading value at which crystallization occurred was measured for various Amino Acid Salt concentrations. A simple relation between the critical CO2 loading value, initial Amino Acid Salt concentration, and solubility of the Amino Acid in water is established. This relation seems to hold well in predicting the critical CO2 loading value for Salts of Amino Acids other than taurine, for which Hook (Ind. Eng. Chem. Res. 1997, 36, 1779) has recently published some qualitative experimental data. The influence of the formation of the solid reaction product during the absorption of CO2 in aqueous potassium taurate solutions on the mass-transfer characteristics of a gas−liquid contactor was investigated semiquantitatively for a stirred reactor. In particular, the effect of the presence and absence of crystals ...
-
kinetics of the reaction of co2 with aqueous potassium Salt of taurine and glycine
Aiche Journal, 2003Co-Authors: Paramasivam Senthil Kumar, J A Hogendoorn, Geert Versteeg, Paul FeronAbstract:The kinetics of the reaction between CO2 and aqueous potassium Salts of taurine and glycine was measured at 295 K in a stirred-cell reactor with a flat gas-liquid interface. For aqueous potassium taurate solutions, the temperature effect on the reaction kinetics was measured at 285 and 305 K. Unlike aqueous primary alkanolamines, the partial reaction order in Amino Acid Salt changes from one at low Salt concentration to approximately 1.5 at Salt concentrations as high as 3,000 mol·m-3. At low Salt concentrations, the measured apparent rate constant (kapp) for potassium glycinate is comparable to the values in literature. In the absence of reliable information in the literature on the kinetics and mechanism of the reaction, the applicability of the zwitterion and termolecular mechanism (proposed originally for alkanolamines) was explored. For the zwitterion mechanism, the forward second-order reaction rate constant (k2) of the CO2 reaction with Amino Acid Salt seems to be much higher than for alkanolamines of similar basicity, indicating that the Bronsted plot for Amino Acid Salts might differ from that of alkanolamines. The contribution of water to the deprotonation of zwitterion seems to be more significant than reported values for aqueous secondary alkanolamines.
-
new absorption liquids for the removal of co2 from dilute gas streams using membrane contactors
Chemical Engineering Science, 2002Co-Authors: Paramasivam Senthil Kumar, J A Hogendoorn, Paul Feron, Geert VersteegAbstract:A new absorption liquid based on Amino Acid Salts has been studied for CO2 removal in membrane gas–liquid contactors. Unlike conventional gas treating solvents like aqueous alkanolamines solutions, the new absorption liquid does not wet polyolefin microporous membranes. The wetting characteristics of aqueous alkanolamines and Amino Acid Salt solutions for a hydrophobic membrane was studied by measuring the surface tension of the liquid and the breakthrough pressure of the liquid into the pores of the membrane. The dependence of the breakthrough pressure on surface tension follows the Laplace–Young equation. The performance of the new absorption liquid in the removal of CO2 was studied in a single fiber membrane contactor over a wide range of partial pressures of CO2 in the gas phase and Amino Acid Salt concentrations in the liquid. A numerical model to describe the mass transfer accompanied by multiple chemical reactions occurring during the absorption of CO2 in the liquid flowing through the hollow fiber was developed. The numerical model gives a good prediction of the CO2 absorption flux across the membrane for the absorption of CO2 in the aqueous Amino Acid Salt solutions flowing through the hollow fiber.
Paramasivam Senthil Kumar - One of the best experts on this subject based on the ideXlab platform.
-
equilibrium solubility of co2 in aqueous potassium taurate solutions part 2 experimental vle data and model
Industrial & Engineering Chemistry Research, 2003Co-Authors: Paramasivam Senthil Kumar, J A Hogendoorn, Paul Feron, S J Timmer, Geert VersteegAbstract:The solubility of CO2 in aqueous potassium taurate solutions was measured at 298 and 313 K. Crystallization of the protonated amine (one of the reaction products) was observed during the absorption of CO2 in concentrated Amino Acid Salt solutions. The influence of crystallization on the equilibrium CO2 absorption capacity of the Amino Acid Salt solution was investigated. The difference in the thermodynamic characteristics of the aqueous Amino Acid Salt solution and aqueous alkanolamines is discussed using the Deshmukh−Mather model (Deshmukh, R. D.; Mather, A. E. Chem. Eng. Sci. 1981, 36, 355). Because of a limited change in the ionic strength of the solution in the range of the measured CO2 loading, a simplified model similar to the one proposed by Kent and Eisenberg (Kent, R.; Eisenberg, B. Hydrocarbon Process. 1976, 55, 87) is used to interpret the solubility data. In addition, the equilibrium constant of the carbamate hydrolysis reaction was experimentally measured for monoethanolamine and the potassiu...
-
equilibrium solubility of co2 in aqueous potassium taurate solutions part 1 crystallization in carbon dioxide loaded aqueous Salt solutions of Amino Acids
Industrial & Engineering Chemistry Research, 2003Co-Authors: Paramasivam Senthil Kumar, J A Hogendoorn, Paul Feron, Geert VersteegAbstract:Crystallization of a reaction product was observed during the absorption of CO2 in aqueous potassium taurate solutions at 298 K. The crystallizing solid was found to be the protonated amine. The critical CO2 loading value at which crystallization occurred was measured for various Amino Acid Salt concentrations. A simple relation between the critical CO2 loading value, initial Amino Acid Salt concentration, and solubility of the Amino Acid in water is established. This relation seems to hold well in predicting the critical CO2 loading value for Salts of Amino Acids other than taurine, for which Hook (Ind. Eng. Chem. Res. 1997, 36, 1779) has recently published some qualitative experimental data. The influence of the formation of the solid reaction product during the absorption of CO2 in aqueous potassium taurate solutions on the mass-transfer characteristics of a gas−liquid contactor was investigated semiquantitatively for a stirred reactor. In particular, the effect of the presence and absence of crystals ...
-
kinetics of the reaction of co2 with aqueous potassium Salt of taurine and glycine
Aiche Journal, 2003Co-Authors: Paramasivam Senthil Kumar, J A Hogendoorn, Geert Versteeg, Paul FeronAbstract:The kinetics of the reaction between CO2 and aqueous potassium Salts of taurine and glycine was measured at 295 K in a stirred-cell reactor with a flat gas-liquid interface. For aqueous potassium taurate solutions, the temperature effect on the reaction kinetics was measured at 285 and 305 K. Unlike aqueous primary alkanolamines, the partial reaction order in Amino Acid Salt changes from one at low Salt concentration to approximately 1.5 at Salt concentrations as high as 3,000 mol·m-3. At low Salt concentrations, the measured apparent rate constant (kapp) for potassium glycinate is comparable to the values in literature. In the absence of reliable information in the literature on the kinetics and mechanism of the reaction, the applicability of the zwitterion and termolecular mechanism (proposed originally for alkanolamines) was explored. For the zwitterion mechanism, the forward second-order reaction rate constant (k2) of the CO2 reaction with Amino Acid Salt seems to be much higher than for alkanolamines of similar basicity, indicating that the Bronsted plot for Amino Acid Salts might differ from that of alkanolamines. The contribution of water to the deprotonation of zwitterion seems to be more significant than reported values for aqueous secondary alkanolamines.
-
new absorption liquids for the removal of co2 from dilute gas streams using membrane contactors
Chemical Engineering Science, 2002Co-Authors: Paramasivam Senthil Kumar, J A Hogendoorn, Paul Feron, Geert VersteegAbstract:A new absorption liquid based on Amino Acid Salts has been studied for CO2 removal in membrane gas–liquid contactors. Unlike conventional gas treating solvents like aqueous alkanolamines solutions, the new absorption liquid does not wet polyolefin microporous membranes. The wetting characteristics of aqueous alkanolamines and Amino Acid Salt solutions for a hydrophobic membrane was studied by measuring the surface tension of the liquid and the breakthrough pressure of the liquid into the pores of the membrane. The dependence of the breakthrough pressure on surface tension follows the Laplace–Young equation. The performance of the new absorption liquid in the removal of CO2 was studied in a single fiber membrane contactor over a wide range of partial pressures of CO2 in the gas phase and Amino Acid Salt concentrations in the liquid. A numerical model to describe the mass transfer accompanied by multiple chemical reactions occurring during the absorption of CO2 in the liquid flowing through the hollow fiber was developed. The numerical model gives a good prediction of the CO2 absorption flux across the membrane for the absorption of CO2 in the aqueous Amino Acid Salt solutions flowing through the hollow fiber.
Adélio Mendes - One of the best experts on this subject based on the ideXlab platform.
-
carbon dioxide removal from anaesthetic gas circuits using hollow fiber membrane contactors with Amino Acid Salt solutions
Journal of Membrane Science, 2009Co-Authors: Arley Figueiredo Portugal, Fernão D. Magalhães, Adélio MendesAbstract:Abstract A novel technology based on the use of hollow fiber membrane contactors with regenerable liquid absorbents is proposed for carbon dioxide removal from anaesthetic closed breathing circuits. To analyse the performance of the contactor for this specific application and the influence of the system parameters, a 2D numerical model was developed for the transport of CO 2 through the hollow fibers. The model considered potassium glycinate solutions as absorbents and a composite membrane made of a porous support layer and a dense thin layer. Both co- and counter-current operations were studied. The model simulation results were compared to those obtained with conventional mass transfer models, valid for limit conditions, and a good agreement was found. The analysis performed indicates that the use of hollow fiber membrane contactors with Amino Acid Salt absorbent solutions is suitable for CO 2 removal from closed anaesthetic circuits. Contactor design and operating conditions are suggested.
-
solubility of carbon dioxide in aqueous solutions of Amino Acid Salts
Chemical Engineering Science, 2009Co-Authors: A F Portugal, Fernão D. Magalhães, Jose M Sousa, Adélio MendesAbstract:Abstract The solubility of CO 2 in aqueous solutions of potassium glycinate was measured in a stirred reactor, at temperatures from 293 to 351 K, for Amino Acid Salt concentrations ranging between 0.1 and 3.0 mol dm - 3 and CO 2 partial pressures up to 6 × 10 4 Pa . CO 2 solubility in potassium threonate 1.0 mol dm - 3 was also measured at 313 K. It was observed that Amino Acid Salt solutions can be very interesting for CO 2 absorption purposes since they present considerably high absorption capacities. Nevertheless, CO 2 solubility in these solutions does not change significantly for temperatures between 293 and 323 K, which can be a draw back concerning the absorbent regeneration. Potassium glycinate solubility data were interpreted using the thermodynamically sound model proposed by Deshmukh and Mather [1981. A mathematical-model for equilibrium solubility of hydrogen-sulfide and carbon-dioxide in aqueous alkanolamine solutions. Chemical Engineering Science 36 (2), 355–362] and the empirical Kent and Eisenberg [1976. Better data for amine treating. Hydrocarbon Processing 55(2), 87–90] model.
J A Hogendoorn - One of the best experts on this subject based on the ideXlab platform.
-
equilibrium solubility of co2 in aqueous potassium taurate solutions part 2 experimental vle data and model
Industrial & Engineering Chemistry Research, 2003Co-Authors: Paramasivam Senthil Kumar, J A Hogendoorn, Paul Feron, S J Timmer, Geert VersteegAbstract:The solubility of CO2 in aqueous potassium taurate solutions was measured at 298 and 313 K. Crystallization of the protonated amine (one of the reaction products) was observed during the absorption of CO2 in concentrated Amino Acid Salt solutions. The influence of crystallization on the equilibrium CO2 absorption capacity of the Amino Acid Salt solution was investigated. The difference in the thermodynamic characteristics of the aqueous Amino Acid Salt solution and aqueous alkanolamines is discussed using the Deshmukh−Mather model (Deshmukh, R. D.; Mather, A. E. Chem. Eng. Sci. 1981, 36, 355). Because of a limited change in the ionic strength of the solution in the range of the measured CO2 loading, a simplified model similar to the one proposed by Kent and Eisenberg (Kent, R.; Eisenberg, B. Hydrocarbon Process. 1976, 55, 87) is used to interpret the solubility data. In addition, the equilibrium constant of the carbamate hydrolysis reaction was experimentally measured for monoethanolamine and the potassiu...
-
equilibrium solubility of co2 in aqueous potassium taurate solutions part 1 crystallization in carbon dioxide loaded aqueous Salt solutions of Amino Acids
Industrial & Engineering Chemistry Research, 2003Co-Authors: Paramasivam Senthil Kumar, J A Hogendoorn, Paul Feron, Geert VersteegAbstract:Crystallization of a reaction product was observed during the absorption of CO2 in aqueous potassium taurate solutions at 298 K. The crystallizing solid was found to be the protonated amine. The critical CO2 loading value at which crystallization occurred was measured for various Amino Acid Salt concentrations. A simple relation between the critical CO2 loading value, initial Amino Acid Salt concentration, and solubility of the Amino Acid in water is established. This relation seems to hold well in predicting the critical CO2 loading value for Salts of Amino Acids other than taurine, for which Hook (Ind. Eng. Chem. Res. 1997, 36, 1779) has recently published some qualitative experimental data. The influence of the formation of the solid reaction product during the absorption of CO2 in aqueous potassium taurate solutions on the mass-transfer characteristics of a gas−liquid contactor was investigated semiquantitatively for a stirred reactor. In particular, the effect of the presence and absence of crystals ...
-
kinetics of the reaction of co2 with aqueous potassium Salt of taurine and glycine
Aiche Journal, 2003Co-Authors: Paramasivam Senthil Kumar, J A Hogendoorn, Geert Versteeg, Paul FeronAbstract:The kinetics of the reaction between CO2 and aqueous potassium Salts of taurine and glycine was measured at 295 K in a stirred-cell reactor with a flat gas-liquid interface. For aqueous potassium taurate solutions, the temperature effect on the reaction kinetics was measured at 285 and 305 K. Unlike aqueous primary alkanolamines, the partial reaction order in Amino Acid Salt changes from one at low Salt concentration to approximately 1.5 at Salt concentrations as high as 3,000 mol·m-3. At low Salt concentrations, the measured apparent rate constant (kapp) for potassium glycinate is comparable to the values in literature. In the absence of reliable information in the literature on the kinetics and mechanism of the reaction, the applicability of the zwitterion and termolecular mechanism (proposed originally for alkanolamines) was explored. For the zwitterion mechanism, the forward second-order reaction rate constant (k2) of the CO2 reaction with Amino Acid Salt seems to be much higher than for alkanolamines of similar basicity, indicating that the Bronsted plot for Amino Acid Salts might differ from that of alkanolamines. The contribution of water to the deprotonation of zwitterion seems to be more significant than reported values for aqueous secondary alkanolamines.
-
new absorption liquids for the removal of co2 from dilute gas streams using membrane contactors
Chemical Engineering Science, 2002Co-Authors: Paramasivam Senthil Kumar, J A Hogendoorn, Paul Feron, Geert VersteegAbstract:A new absorption liquid based on Amino Acid Salts has been studied for CO2 removal in membrane gas–liquid contactors. Unlike conventional gas treating solvents like aqueous alkanolamines solutions, the new absorption liquid does not wet polyolefin microporous membranes. The wetting characteristics of aqueous alkanolamines and Amino Acid Salt solutions for a hydrophobic membrane was studied by measuring the surface tension of the liquid and the breakthrough pressure of the liquid into the pores of the membrane. The dependence of the breakthrough pressure on surface tension follows the Laplace–Young equation. The performance of the new absorption liquid in the removal of CO2 was studied in a single fiber membrane contactor over a wide range of partial pressures of CO2 in the gas phase and Amino Acid Salt concentrations in the liquid. A numerical model to describe the mass transfer accompanied by multiple chemical reactions occurring during the absorption of CO2 in the liquid flowing through the hollow fiber was developed. The numerical model gives a good prediction of the CO2 absorption flux across the membrane for the absorption of CO2 in the aqueous Amino Acid Salt solutions flowing through the hollow fiber.