一种相平衡数据模拟的新方法

A New Method of Phase Equilibrium Data-Modeling

本文提出溶液相对挥发系数的概念,建立三参数、五参数汽液相平衡模型,这是一种不同于常规的相平衡数据模拟方法。本方法也可用于恒沸、分层、缔合等各种非理想溶液的平衡体系,比常规方法适用范围大。最后用非线性最小二乘法模拟130组二元汽液相平衡实验数据,结果表明本方法比常规方法简单,精度提高三倍左右。

A conception about the relative volatile coefficience of solution is presented in this article. The model of vapor and liquid equilibrium which uses three parameters or five parameters is established about binary component, then a modeling technique of equbilibrium data which is different from the normal methods is introduced. This model is applied to various isothemal or isobaric non-ideal solutions including azeotropes, separative layers or association, therefore it has a wider range than the normal models. 130 sets of binary vapor-Liquid equilibrium data are modeled by using the nonliner least sqeare technique, the result shows that the method is simpler than the normal methods, its accuracy is as three times as those of them.