由纯组元性质预估过量体积和过量焓——新关联方程的提出

PREDICTION OF EXCESS VOLUME AND EXCESS ENTHALPY FROM PROPERTIES OF PURE COMPONENTS——PROPOSAL OF A NEW EQUATION OF CORRELATION

在各种预估溶液过量性质的方法中,以统计力学为基础的Flory法常被采用。在此基础上,Pollin和Fried按虚拟双流体理论所提出的方法使预估的准确性有所提高。其他还可以提到Lieberman以Van der Waals方程为基础的预估方法。本文的目的是从反映液体实际PVT性质的函数关系出发,提出相应的状态方程,并用于推导预估液体溶液过量性质的新关联方程。

On the basis of a general functional relation representing the actual PVT properties of liquids, an equation of state of the van der Waals type has heen obtained. A new equation of correlation for prediction of excess volume and excess enthalpy has been derived from the above equation as follows: where The results of calculation of its application to 77 binary systems with 148 experimental points show that, for prediction of V^E, it is better than the Flory method and in the wide scope concerned obviously much better than the Liebermann method and, for prediction of H^E, it is generally as good as the Pollin and Fried method. The equation of correlation proposed is simple in calculation, and can be applied to multi-component systems consisting of any liquids.