Prediction of solubilities of salts, osmotic coefficients and vapor-liquid equilibria for single and mixed solvent electrolyte systems using the LIQUAC model

被引：28

作者：

Huang, Junqi ^{[2
]}

Li, Jiding ^{[2
]}

Gmehling, Juergen ^{[1
]}

机构：

[1] Carl von Ossietzky Univ Oldenburg, Lehrstuhl Tech Chem, D-26111 Oldenburg, Germany

[2] Tsinghua Univ, Dept Chem Engn, Beijing 100084, Peoples R China

来源：

FLUID PHASE EQUILIBRIA | 2009年 / 275卷 / 01期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

Electrolyte solution; Salt solubility; LIQUAC; VLE; Osmotic coefficient; EXTENDED UNIQUAC MODEL; SOLID EQUILIBRIA; TERNARY-SYSTEMS; G(E) MODEL; THERMODYNAMIC PROPERTIES; PHASE-EQUILIBRIA; SODIUM-CHLORIDE; WATER; POTASSIUM; NONELECTROLYTES;

D O I：

10.1016/j.fluid.2008.09.007

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The electrolyte model LIQUAC has been used up till now to predict osmotic coefficients, mean ion activity coefficients, the vapor-liquid equilibrium (VLE) behavior, the solubility of gases in single and mixed solvent electrolyte systems, and solubilities of salts in aqueous solutions. In this paper, the required expressions for the calculation of salt solubilities not only in aqueous systems, but also in organic solvents and water-solvent electrolyte systems were deduced in detail based on the LIQUAC model with a fixed reference state and thermodynamic relations. Four salts (NaCl, KCl, NH4Cl and NaF) and two solvent (water and methanol) were selected to test the derived expressions. The results show that the LIQUAC model with a fixed reference state can be used to predict osmotic coefficients, solubilities of salts in aqueous solutions, vapor-liquid equilibria, and the solubilities of salts in water-organic solvent systems with strong electrolytes. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：8 / 20

页数：13

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