关于对应态参数的探讨

本文提出对于以偏心因子(?)为对应态第三参数的物性关联式而言,临界压缩因子Z_c是一个好的校正因子,用Z_c成功地校正了Patel-Teja状态方程中两个有关分子特性的关联式,并将仅能计算非极性分子饱和液体体积的Bhirud方程扩展到了极性分子.

Studies on Parameters for Corresponding States

This paper proposes that a critical compressibility factor Zc can be used as a fourth parameter for corresponding states, as a result of the analysis of the relationship between Zc and acentric factor w. Two formulas used in the Patel-Teja equation of state for expressing molecular characteristics can be improved by using Zc. Excellent results are obtained with these two new formulas for predicting certain polar molecules not included in the process of fitting parameters. Bhirud equation, which is only adoptable for saturated liquid volumes of non-polar molecules, has been successfully extended for polar molecules. For polar molecules, no definite relationship does exist between Zc and w. It is assumed, therefore, that Zc would probably serve as a good correction factor for some formulas in which w is used as the third parameter for corresponding states.