摘要
综述了用超额G ibbs自由能-状态方程模型计算相平衡的思路及进展,介绍了Huron-V idal,W ong-San-d ler,MHV1,MHV2,LCVM,HV ID等几种超额G ibbs自由能混合规则。重点介绍了UN IFAC基团贡献法、MHV1混合规则和SRK方程三者结合的可预测相平衡的PSRK模型及其改进。与结合传统混合规则的状态方程法及活度系数法相比较,超额G ibbs自由能-状态方程模型能够在更大范围内准确计算和预测流体相平衡。
The GE-EOS model is a new deduced method for phase equilibrium calculation. In this method, the interaction parameter a of cubic equation of state is given as a function of the excess Gibbs free energy. The explicit derivation of this model is presented. Several GE mixing rules such as Huron-Vidal, Wong-Sandier, MHV1, MHV2, LCVM and HVID were introduced. The PSRK model-united MHV1 mixing rule, UNIFAC group contribution method and SRK equation of state-which can predict the phase equilibrium, was recommended. At high pressure and high temperature range, or asymmetric system and polar system presented, the GE-EOS model gives more precise result than EOS method with conventional mixing rule and activity coefficient method.
出处
《石油化工》
EI
CAS
CSCD
北大核心
2005年第7期694-698,共5页
Petrochemical Technology
关键词
状态方程
混合规则
相平衡
超额自由能
基团贡献法
equation of state
mixing rule
phase equilibrium
excess free energy
group contribution method
