Prediction of Vapor Composition in Isobaric Vapor-Liquid Systems Containing Salts at Saturation

Jaques, Derek; Furter, William F.

doi:10.1021/ba-1972-0115.ch011

Cited by 19 publications

(9 citation statements)

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“…The association of the salt effect with only one solvent is comparable to the preferential solvation assumption in the solvation approach. Jaques and Furter (1972a) proposed a similar approach for saturated salt systems. In their method, pseudocomponent 1 * is the first solvent saturated with the salt, and pseudocomponent 2* is the second solvent saturated with the salt.…”

Section: Conclusion and Significancementioning

confidence: 99%

Thermodynamic representation of phase equilibria of mixed‐solvent electrolyte systems

1986

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lates the vapor-liquid equilibrium and liquid-liquid equilibrium of mixedsolvent electrolyte systems over the entire range of temperature and concentrations.Correlation of experimental data for 47 single-solvent electrolyte systems and 33 mixed-solvent electrolyte systems demonstrates that the electrolyte NRTL model gives excellent representation of vapor-liquid equilibrium and liquid-liquid equilibrium of mixed-sol-vent electrolyte systems. Average errors of AP = 1 kPa, AT = 0.1 K, Ay = 0.01 in correlating vapor-liquid equilibrium data at atmospheric conditions, and Ax = 0.01 in correlating liquid-liquid equilibrium data are typical. Previous MethodsIn the late 1960's and the 1970's, several semiempirical models for representing the excess Gibbs energy of nonelectrolyte liquid solutions were developed with the local composition concept. Examples are the Wilson (1964) model, the NRTL model (Renon and Prausnitz, 1968), and the UNIQUAC model (Abrams and Prausnitz, 1975). These models are able to represent, with a reasonable number of binary adjustable parameters, the phase equilibrium of highly nonideal nonelectrolyte systems. Parameter RequirementsThe model binary adjustable parameters are associated with the solvent-solvent pairs, solvent-salt pairs, and salt-salt pairs.

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Section: Conclusion and Significancementioning

confidence: 99%

Thermodynamic representation of phase equilibria of mixed‐solvent electrolyte systems

1986

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“…Jaques and Furter (1972) developed a prediction model based on the local composition equation of Wilson. Jaques and Furter (1972) developed a prediction model based on the local composition equation of Wilson.…”

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confidence: 99%

“…It stated that the ratio of relative volatilities of a binary system with and without salt varies with the concentration of salt added to the mixture: This equation has the advantage of simplicity, but K is highly dependent on the liquid phase composition, which limits the applicability of this equation. Jaques and Furter (1972) developed a prediction model based on the local composition equation of Wilson. They obtained vapor phase composition via T-P-X data.…”

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confidence: 99%

Improving prediction of salt effect on vle of isopropyl alcohol‐h₂o‐salt and methanol‐h₂o‐salt systems with preferential association

1991

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When a salt is added to an azeotropic mixture, the azeotropic composition tends to shift or even disappear, due to salt-in and salt-out effects. Models from the literature are applied to calculate the vapor-liquid equilibrium of systems of isopropyl alcohol H, O-salt, and methanol H,O-salt. Schmitt and Vogelpohl's model (1982) gives the best results. With the concept of preferential association, an improvement can be accomplished through the modified distribution factor of the salt associating with components of the mixture for the systems mentioned above.Owing to the lack of solubility data of the salt in the individual components of the azeotropic mixture, the generality of this modification has not yet been demonstrated.Lorsque du sel est ajoutt ?I un mklange azkotrope, la composition azkotrope tend 2 se dCcaler ou m&me ?I disparaitre, en raison des effets de salage et de relargage. Les modbles parus dans la littkrature sont appliquks pour calculer I'Cquilibre vapeur-liquide des systhes d'alcool isopropyl-H,O-sel et mttanol-H,O-sel. Le modble de Schmitt et Vogelpohl (1982) donne les meilleurs rksultats. Avec le concept de l'association prkfkrentielle, on peut obtenir une amklioration par le facteur de distribution modifiC du sel s'associant avec les autres composants du mtlange pour les systbmes mentionnks ci-dessus.En raison de I'absence de donntes sur la solubilitk du sel dans chacun des composants formant le mklange azkotrope, on n'a pas encore pu dkmontrer le caractltre gknkral de cette modification.Keywords: salt effect, vapor-liquid equilibria, ternary VLE, preferential association.istillation plays a very important role in the separation

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“…Introduction Barker (1953) proposed a method for calculating vapor composition from the boiling point-composition curves for binary mixtures of liquids. Recently Jaques and Furter (1972) modified the method for systems composed of two liquids and a salt dissolved to saturation and tested the procedure on data for ethanol-water systems saturated with a range of inorganic salts.…”

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confidence: 99%

Prediction of Vapor Composition in Methanol-, 1-Propanol-, and 2-Propanol-Water Systems Containing Salts at Saturation

Jaques¹

1976

Ind. Eng. Chem. Proc. Des. Dev.

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Equilibrium vapor compositions are calculated from boiling point-liquid composition data in which the ternary system is treated as a pseudo-binary. The Wilson equation in either its two-or three-constant form is used for the correlation. The inclusion of the observed vapor composition in a correlation using @ / W a s the dependent variable is shown to lead to a significantly poorer prediction in the majority of cases.

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Prediction of Vapor Composition in Isobaric Vapor-Liquid Systems Containing Salts at Saturation

Cited by 19 publications

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Thermodynamic representation of phase equilibria of mixed‐solvent electrolyte systems

Thermodynamic representation of phase equilibria of mixed‐solvent electrolyte systems

Improving prediction of salt effect on vle of isopropyl alcohol‐h₂o‐salt and methanol‐h₂o‐salt systems with preferential association

Prediction of Vapor Composition in Methanol-, 1-Propanol-, and 2-Propanol-Water Systems Containing Salts at Saturation

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Prediction of Vapor Composition in Isobaric Vapor-Liquid Systems Containing Salts at Saturation

Cited by 19 publications

References 0 publications

Thermodynamic representation of phase equilibria of mixed‐solvent electrolyte systems

Thermodynamic representation of phase equilibria of mixed‐solvent electrolyte systems

Improving prediction of salt effect on vle of isopropyl alcohol‐h2o‐salt and methanol‐h2o‐salt systems with preferential association

Prediction of Vapor Composition in Methanol-, 1-Propanol-, and 2-Propanol-Water Systems Containing Salts at Saturation

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Improving prediction of salt effect on vle of isopropyl alcohol‐h₂o‐salt and methanol‐h₂o‐salt systems with preferential association