Extension of LCVM-type mixing rule to three-parameter equations of state for vapor-liquid equilibria of mixtures  

作　　者：韩晓红 陈光明 王勤 崔晓龙 

机构地区：[1]Institute of Geotechnical Engineering, Zhejiang University

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2005年第B08期17-22,共6页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：Project (No. 50276054) supported by the National Natural Science Foundation of China

摘　　要：In this paper, the LCVM mixing rule is extended to the multi-parameter equations of state by combining infi- nite-pressure and zero-pressure mixing rule models. The new LCVM-type mixing rule, coupled with Patel-Teja equation of state (EOS) is applied for vapor-liquid equilibria of different polar and non-polar systems in which the NRTL activity coefficient model is used to calculate the excess Gibbs free energy. The tested results agree well with existing experimental data within a wide range of temperatures and pressures. In comparison with the Van der Waals mixing rule, the new mixing rule gives much better corre- lations for the vapor-liquid equilibria of non-polar and polar systems.In this paper, the LCVM mixing rule is extended to the multi-parameter equations of state by combining infinite-pressure and zero-pressure mixing rule models. The new LCVM-type mixing rule, coupled with Patel-Teja equation of state （EOS） is applied for vapor-liquid equilibria of different polar and non-polar systems in which the NRTL activity coefficient model is used to calculate the excess Gibbs free energy. The tested results agree well with existing experimental data within a wide range of temperatures and pressures. In comparison with the Van der Waals mixing rule, the new mixing rule gives much better correlations for the vapor-liquid equilibria of non-polar and polar systems.

关 键 词：Vapor-liquid equilibrium （VLE） Equation of state （EOS） Mixing rule Activity coefficient model 

分 类 号：O642.4[理学—物理化学]