高压下混合物超额焓的简化计算方法

A Simplified Method for Calculating Excess Enthalpies for Mixtures at High Pressure

利用我们最近提出的方法计算高压下二元系的超额焓．该方法利用ＦＲＫＳ状态方程并引入二元互作用函数为计算体系提供随状态变化的二元互作用参数数值．选择了３０个各种不同类型的体系，包括９个液相体系和２１个气相体系来检验方法的可行性．计算结果表明，该方法能精确地关联高压下二元系的超额焓。

The approach recently proposed by Liu and Qu was extended to correlate binary excess enthalpies at high pressure. Thirty various kinds of systems, including 21 gaseous and 9 liquid systems, were selected to do the test. The results calculated show that FRKS equation of state coupled with the binary interaction function, which is used to provide state - dependent L12 values for every point calculated, can improve significantly the correlation of binary excess enthalpies at high pressure.