从纯流体与等压下二元流体混合物类比得出的g~E模型

由Gibbs—Duhem方程可得纯流体与等压下二元流体混合物变量间的对应关系.采用类比法,得到了与现行状态方程相同形式的g~E模型.采用3种不同的温度函数,并引入临界共溶点条件,选择与Martin-Hou方程类比而得的g~E模型进行了研究.关联结果表明,所提出的g~E模型能成功地用于关联液液平衡和汽液平衡.

g~E MODEL BY ANALOGY BETWEEN PURE FLUIDAND BINARY FLUID MIXTURE UNDERCONSTANT PRESSURE

From the Gibbs-Duhem equation, there exists a one-to-one correspondence of variables between pure fluid and binary fluid mixture under constant pressure. By analogy, gE models similar in form to equations of state (EOS) are obtained. The gE model corresponding to the Martin-Hou EOS is selected for detailed study. Three dif ferent temperature functions are considered. Calculations show that the gE model can be used successfully to correlate liquid-liquid equilibrium and vapor-liquid equilibrium data.