Abstract: On the basis of the generalized Gibbs free energy model for mixing of liquids proposed by the authors in another paper, a non - local - composition activity coefficient equation with two parameters is derived. It is applicable to various small molecule liquid mixtures and polymer solutions, and can be used to predict the VLE of multi - component systems with the binary parameters. The calculated results of the bubble point for small molecule liquid mixtures show that the calculated accuracy is comparable to local -composition - activity coefficient equations, except for the alcohol/hydrocarbon systems. Its applicability to the VLE of polymer solutions is evidently superior to UNIQUAC equations etc.

摘要： 根据前文提出的液体混合的通用Gibbs自由能模型,导得了一个两参数非局部组成型活度系数方程.它适用于各种小分子液体混合物和高分子溶液,并能由二元参数预测多元系汽液平衡.对小分子液体混合物的泡点计算结果表明,除了醇/烃系统外,计算准确度不逊于局部组成型活度系数方程.它对高分子溶液的适用性则明显地优于UNIQUAC等方程.