统一性溶液理论及其应用

THE UNITIZED THEORY OF SOLUTION AND ITS APPLICATIONS

本文基于正规溶液模型和胞腔溶液模型构作了一个称之为统一性的溶液理论，并以此建立了相应的超额Ｇｉｂｂｓ自由能和活度系度数方程。另外，还应用该模型的活度系数方程计算了一些具有代表性体系的汽液平衡，取得很好的结果。

In this paper,a unitized theory of solution is constructed based on the regular mixture model and the cell model of mixture.Thus the equations of excess Gibbs free energy and activity coefficient of this model are derived by classical thermodynamic method.Then the proposed equation of activity coefficient is appplied to calculate the vapor-liquid equilibrium data of some binary systems(including strongly polar and associated mixtures, such as alcohol-water,alcohol-hydrocarbon etc.).It is found that the proposed equation can give the very satisfactory results.In addition,from the infinite dilute activity coefficient data of binary systems the apparent coordination number of every component of binary systems can be also determined.The coordination number data are useful for calculation of vapor-liquid or liquid-liquid equilibria of various systems. On the other hand the above results show that the regular solution equation is successfully improved. That is, its application is not only extended,but very valid.