MOLECULAR THERMODYNAMICS OF SALT EFFECT IN VAPOR-LIQUID EQUILIBRIUM——CALCULATION OF ISOBARIC VLE SALT EFFECT PARAMETERS FOR ETHANOL-WATER-1-1 TYPE ELECTROLYTIC SYSTEMS

孙仁义

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MOLECULAR THERMODYNAMICS OF SALT EFFECT IN VAPOR-LIQUID EQUILIBRIUM——CALCULATION OF ISOBARIC VLE SALT EFFECT PARAMETERS FOR ETHANOL-WATER-1-1 TYPE ELECTROLYTIC SYSTEMS

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- MOLECULAR THERMODYNAMICS OF SALT EFFECT IN VAPOR-LIQUID EQUILIBRIUM——CALCULATION OF ISOBARIC VLE SALT EFFECT PARAMETERS FOR ETHANOL-WATER-1-1 TYPE ELECTROLYTIC SYSTEMS
- CIESC Journal Issue 4, (1996)
- 作者机构：
  
  河南大学化学系,开封,475001
- 作者简介：
- 基金信息：
- DOI：
  CLC： 642
- Online First：25 August 1996，
  
  Published：25 August 1996
- 稿件说明：
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孙仁义. MOLECULAR THERMODYNAMICS OF SALT EFFECT IN VAPOR-LIQUID EQUILIBRIUM——CALCULATION OF ISOBARIC VLE SALT EFFECT PARAMETERS FOR ETHANOL-WATER-1-1 TYPE ELECTROLYTIC SYSTEMS[J]. CIESC Journal, 1996, (4).
DOI：

孙仁义. MOLECULAR THERMODYNAMICS OF SALT EFFECT IN VAPOR-LIQUID EQUILIBRIUM——CALCULATION OF ISOBARIC VLE SALT EFFECT PARAMETERS FOR ETHANOL-WATER-1-1 TYPE ELECTROLYTIC SYSTEMS[J]. CIESC Journal, 1996, (4). DOI：

摘要

测定了6个乙醇-水-1-1型电解质系统（LiCl、LiBr、NaBr、NaAc、KCl、KI）恒压（100.8kPa）条件下的汽液平衡盐效应参数.在Pierotti定标粒子溶液理论基础上提出非电解质浓度任意变化条件下含盐双液系汽液平衡盐效应参数的计算方法.硬球作用项采用Masterton-Lee方程计算，软球作用项采用胡英等人建议的分子热力学模型计算．对于乙醇-水极性混合溶剂系统，离子-中心分子的碰撞直径考虑离子溶剂化的影响，以离子的溶剂化系数为可调参数，拟合出混合溶剂的局部介电常数与乙醇摩尔分数的关联方程．预测结果表明，在很大液相浓度范围（X_1=0.143～0.700）内14个乙醇-水-1-1型电解质系统52个盐效应参数的平均相对误差为7.76％

Abstract

Salt effect parameters(from Furlers equation)of 6 ethanol-water-1-1 type electrolytic (LiC 、LiBr、NaBr、NaAc、KCI、KI)systems were determined by isobaric VLE experi ments.A calculation method of these parameters at any nonelectrolytic concentration was pro- posed based on Pierottis scaled particle theory.The term of hard sphere interaction was calculated by Masterton-Lees equation.The term of soft sphere interaction was calculated by Hu Yings molecular thermodynamic model

in which the diameter of naked ion was replaced by solvated ion and solvation coefficient was taken to be a adjustable parameter.A correlation equation for the locallzed dielectrical constant of mixture and liquid concentration was obtained by mapping out experimental point.The calculated isobaric VLE salt effect parameters of 14 ethanol-water-1-1 type electrolytic systems were in good agreement with literature values and experimental values of this work within the wider range of Liquid concentration.

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