流体混合物的双重格子模型对二元汽－液平衡和过量焓的应用

Calculation of Vapor-Ljquid Equilibrium and Excess Enthalpy by Double-Lattice Model for Binary Fluid Mixtures

计算表明，本模型对小分子二元系统汽－液平衡关联计算的效果，不亚于常用的Ｗｉｌｓｏｎ、ＮＲＴＬ、ＵＮＩＱＵＡＣ等局部组成型的活度系数模型。对具有吸热或放热效应的系统的过量焓关联结果令人满意。

The double-lattice model presented by authors for the Helmholtz energy of mixingfor liquid mixtures has been extended to correlate the binary vapor liquid equili bria and excessenthalpy. It is shown that the corielated results for binary vapor liquid equilibria are goodas normal local composition models of activity coefficient,such as Wilson,NRTL and UNIQUACmodel.The excess enthalpy of binary systems with endothermal or exothermal can also besatisfactorily correlated by this model.However,it is not suitable for the systems with bothendothermal and exothermal.The second-order or high-order moment of additional energy fororiented interaction has no effect on the calculated results.