The Experts below are selected from a list of 231 Experts worldwide ranked by ideXlab platform
Jürgen Gmehling - One of the best experts on this subject based on the ideXlab platform.
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influence of sulfate based anion ionic liquids on the Separation Factor of the binary azeotropic system acetone methanol
Fluid Phase Equilibria, 2013Co-Authors: Hiroyuki Matsuda, Vincent Liebert, Katsumi Tochigi, Jürgen GmehlingAbstract:Abstract Two sulfate-based anion ionic liquids: 1-ethyl-3-methylimidazolium hydrogen sulfate [EMIM]+[HSO4]− and 1-ethyl-3-methylimidazolium methyl sulfate [EMIM]+[MeSO4]− were investigated as entrainer candidates for the Separation of the binary azeotropic system acetone + methanol. Vapor–liquid equilibria (VLE) for the binary system acetone + methanol and the ternary mixtures with these sulfate-based anion ionic liquids were measured by headspace gas chromatography. From the experimental VLE data, the influence of the ionic liquid on the Separation Factors was investigated. The experimental results for the ternary systems show that the two ionic liquids investigated enhance the Separation Factor of the binary system acetone + methanol. The calculated Separation Factors of the two ionic liquids for the binary system acetone + methanol were compared with those of the ionic liquid hexylpyridinium bis(trifluoromethylsulfonyl)imide [HPY]+[BTI]−, and the conventional organic entrainers: ethylene glycol and water.
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Influence of sulfate-based anion ionic liquids on the Separation Factor of the binary azeotropic system acetone + methanol
Fluid Phase Equilibria, 2013Co-Authors: Hiroyuki Matsuda, Vincent Liebert, Katsumi Tochigi, Jürgen GmehlingAbstract:Abstract Two sulfate-based anion ionic liquids: 1-ethyl-3-methylimidazolium hydrogen sulfate [EMIM]+[HSO4]− and 1-ethyl-3-methylimidazolium methyl sulfate [EMIM]+[MeSO4]− were investigated as entrainer candidates for the Separation of the binary azeotropic system acetone + methanol. Vapor–liquid equilibria (VLE) for the binary system acetone + methanol and the ternary mixtures with these sulfate-based anion ionic liquids were measured by headspace gas chromatography. From the experimental VLE data, the influence of the ionic liquid on the Separation Factors was investigated. The experimental results for the ternary systems show that the two ionic liquids investigated enhance the Separation Factor of the binary system acetone + methanol. The calculated Separation Factors of the two ionic liquids for the binary system acetone + methanol were compared with those of the ionic liquid hexylpyridinium bis(trifluoromethylsulfonyl)imide [HPY]+[BTI]−, and the conventional organic entrainers: ethylene glycol and water.
Jacob A. Moulijn - One of the best experts on this subject based on the ideXlab platform.
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Transport and Separation properties of a silicalite-1 membrane—II. Variable Separation Factor
Chemical Engineering Science, 1999Co-Authors: L.j.p. Van Den Broeke, Freek Kapteijn, Jacob A. MoulijnAbstract:Results for the permeation of binary mixtures through a silicalite-1 membrane are presented. The binary Separation Factor for mixtures of CH4–N2, CO2–N2, and CO2–CH4 is studied as a function of the feed composition and as a function of the feed pressure. A comparison is made between the Separation Factor calculated from the binary fluxes and the so-called ideal Separation Factor, which is given by the ratio of the one-component flux. In general, the binary Separation cannot be predicted from the one-component data alone. At ambient temperature the Separation obtained with the silicalite-1 membrane is based on a difference in equilibrium adsorption. It is found that the Separation Factor is a function of both the composition and the pressure. The fact that the Separation Factor varies with the feed composition and the feed pressure cannot be explained with the extended Langmuir model used to describe the binary equilibrium adsorption. A reasonable description of the Separation Factor as a function of the pressure and composition is possible with the ideal adsorbed solution theory. Using the permeation and Separation properties for the CO2/N2/silicalite-1 system a membrane cascade is designed. The surface area of the membrane cascade has been calculated with both the binary and the ideal Separation Factor.
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transport and Separation properties of a silicalite 1 membrane ii variable Separation Factor
Chemical Engineering Science, 1999Co-Authors: L.j.p. Van Den Broeke, Freek Kapteijn, Jacob A. MoulijnAbstract:Results for the permeation of binary mixtures through a silicalite-1 membrane are presented. The binary Separation Factor for mixtures of CH4–N2, CO2–N2, and CO2–CH4 is studied as a function of the feed composition and as a function of the feed pressure. A comparison is made between the Separation Factor calculated from the binary fluxes and the so-called ideal Separation Factor, which is given by the ratio of the one-component flux. In general, the binary Separation cannot be predicted from the one-component data alone. At ambient temperature the Separation obtained with the silicalite-1 membrane is based on a difference in equilibrium adsorption. It is found that the Separation Factor is a function of both the composition and the pressure. The fact that the Separation Factor varies with the feed composition and the feed pressure cannot be explained with the extended Langmuir model used to describe the binary equilibrium adsorption. A reasonable description of the Separation Factor as a function of the pressure and composition is possible with the ideal adsorbed solution theory. Using the permeation and Separation properties for the CO2/N2/silicalite-1 system a membrane cascade is designed. The surface area of the membrane cascade has been calculated with both the binary and the ideal Separation Factor.
Hiroyuki Matsuda - One of the best experts on this subject based on the ideXlab platform.
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influence of sulfate based anion ionic liquids on the Separation Factor of the binary azeotropic system acetone methanol
Fluid Phase Equilibria, 2013Co-Authors: Hiroyuki Matsuda, Vincent Liebert, Katsumi Tochigi, Jürgen GmehlingAbstract:Abstract Two sulfate-based anion ionic liquids: 1-ethyl-3-methylimidazolium hydrogen sulfate [EMIM]+[HSO4]− and 1-ethyl-3-methylimidazolium methyl sulfate [EMIM]+[MeSO4]− were investigated as entrainer candidates for the Separation of the binary azeotropic system acetone + methanol. Vapor–liquid equilibria (VLE) for the binary system acetone + methanol and the ternary mixtures with these sulfate-based anion ionic liquids were measured by headspace gas chromatography. From the experimental VLE data, the influence of the ionic liquid on the Separation Factors was investigated. The experimental results for the ternary systems show that the two ionic liquids investigated enhance the Separation Factor of the binary system acetone + methanol. The calculated Separation Factors of the two ionic liquids for the binary system acetone + methanol were compared with those of the ionic liquid hexylpyridinium bis(trifluoromethylsulfonyl)imide [HPY]+[BTI]−, and the conventional organic entrainers: ethylene glycol and water.
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Influence of sulfate-based anion ionic liquids on the Separation Factor of the binary azeotropic system acetone + methanol
Fluid Phase Equilibria, 2013Co-Authors: Hiroyuki Matsuda, Vincent Liebert, Katsumi Tochigi, Jürgen GmehlingAbstract:Abstract Two sulfate-based anion ionic liquids: 1-ethyl-3-methylimidazolium hydrogen sulfate [EMIM]+[HSO4]− and 1-ethyl-3-methylimidazolium methyl sulfate [EMIM]+[MeSO4]− were investigated as entrainer candidates for the Separation of the binary azeotropic system acetone + methanol. Vapor–liquid equilibria (VLE) for the binary system acetone + methanol and the ternary mixtures with these sulfate-based anion ionic liquids were measured by headspace gas chromatography. From the experimental VLE data, the influence of the ionic liquid on the Separation Factors was investigated. The experimental results for the ternary systems show that the two ionic liquids investigated enhance the Separation Factor of the binary system acetone + methanol. The calculated Separation Factors of the two ionic liquids for the binary system acetone + methanol were compared with those of the ionic liquid hexylpyridinium bis(trifluoromethylsulfonyl)imide [HPY]+[BTI]−, and the conventional organic entrainers: ethylene glycol and water.
L.j.p. Van Den Broeke - One of the best experts on this subject based on the ideXlab platform.
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Transport and Separation properties of a silicalite-1 membrane—II. Variable Separation Factor
Chemical Engineering Science, 1999Co-Authors: L.j.p. Van Den Broeke, Freek Kapteijn, Jacob A. MoulijnAbstract:Results for the permeation of binary mixtures through a silicalite-1 membrane are presented. The binary Separation Factor for mixtures of CH4–N2, CO2–N2, and CO2–CH4 is studied as a function of the feed composition and as a function of the feed pressure. A comparison is made between the Separation Factor calculated from the binary fluxes and the so-called ideal Separation Factor, which is given by the ratio of the one-component flux. In general, the binary Separation cannot be predicted from the one-component data alone. At ambient temperature the Separation obtained with the silicalite-1 membrane is based on a difference in equilibrium adsorption. It is found that the Separation Factor is a function of both the composition and the pressure. The fact that the Separation Factor varies with the feed composition and the feed pressure cannot be explained with the extended Langmuir model used to describe the binary equilibrium adsorption. A reasonable description of the Separation Factor as a function of the pressure and composition is possible with the ideal adsorbed solution theory. Using the permeation and Separation properties for the CO2/N2/silicalite-1 system a membrane cascade is designed. The surface area of the membrane cascade has been calculated with both the binary and the ideal Separation Factor.
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transport and Separation properties of a silicalite 1 membrane ii variable Separation Factor
Chemical Engineering Science, 1999Co-Authors: L.j.p. Van Den Broeke, Freek Kapteijn, Jacob A. MoulijnAbstract:Results for the permeation of binary mixtures through a silicalite-1 membrane are presented. The binary Separation Factor for mixtures of CH4–N2, CO2–N2, and CO2–CH4 is studied as a function of the feed composition and as a function of the feed pressure. A comparison is made between the Separation Factor calculated from the binary fluxes and the so-called ideal Separation Factor, which is given by the ratio of the one-component flux. In general, the binary Separation cannot be predicted from the one-component data alone. At ambient temperature the Separation obtained with the silicalite-1 membrane is based on a difference in equilibrium adsorption. It is found that the Separation Factor is a function of both the composition and the pressure. The fact that the Separation Factor varies with the feed composition and the feed pressure cannot be explained with the extended Langmuir model used to describe the binary equilibrium adsorption. A reasonable description of the Separation Factor as a function of the pressure and composition is possible with the ideal adsorbed solution theory. Using the permeation and Separation properties for the CO2/N2/silicalite-1 system a membrane cascade is designed. The surface area of the membrane cascade has been calculated with both the binary and the ideal Separation Factor.
David D Y Chen - One of the best experts on this subject based on the ideXlab platform.
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redefining the Separation Factor a potential pathway to a unified Separation science
Electrophoresis, 1997Co-Authors: Michael T Bowser, Gwendolyn M Bebault, Xuejun Peng, David D Y ChenAbstract:Understanding the Separation process in capillary electrophoresis (CE) leads to the unification of the theories for Separation science. While the Separation of analytes is governed by equilibria in chromatography, and by (centrifugal) field in ultracentrifugation, the Separation in CE is governed by both equilibria and (electric) field. Therefore, a comprehensive Separation theory that describes the Separation process of analytes in CE should be able to describe the Separation processes in both chromatography and ultracentrifugation. In this paper, we propose that individual capacity Factors for each analyte species be used to describe the migration behavior of an analyte. The effect of field on each analyte species, as well as the effect of equilibria are considered in deriving a generalized equation that is applicable for all Separation techniques. The Separation Factor defined at present does not directly relate to the migration rates of the analytes, and therefore can not be used in a generalized theory. We propose that the ratio of the migration rates of a pair of analytes (γ) should be used as the Separation Factor, instead of the ratio of the two capacity Factors. When γ is used to describe the Separation of two closely migrating analytes, all Separation techniques have the same resolution equation.
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Redefining the Separation Factor: A potential pathway to a unified Separation science
Electrophoresis, 1997Co-Authors: Michael T Bowser, Gwendolyn M Bebault, Xuejun Peng, David D Y ChenAbstract:Understanding the Separation process in capillary electrophoresis (CE) leads to the unification of the theories for Separation science. While the Separation of analytes is governed by equilibria in chromatography, and by (centrifugal) field in ultracentrifugation, the Separation in CE is governed by both equilibria and (electric) field. Therefore, a comprehensive Separation theory that describes the Separation process of analytes in CE should be able to describe the Separation processes in both chromatography and ultracentrifugation. In this paper, we propose that individual capacity Factors for each analyte species be used to describe the migration behavior of an analyte. The effect of field on each analyte species, as well as the effect of equilibria are considered in deriving a generalized equation that is applicable for all Separation techniques. The Separation Factor defined at present does not directly relate to the migration rates of the analytes, and therefore can not be used in a generalized theory. We propose that the ratio of the migration rates of a pair of analytes (γ) should be used as the Separation Factor, instead of the ratio of the two capacity Factors. When γ is used to describe the Separation of two closely migrating analytes, all Separation techniques have the same resolution equation.
