摘要
对Patel和Teja状态方程提出了一种新的与密度有关的混合规则,运用这种规则对十几种体系(包括非极性、弱极性、强极性及综合性体系)的汽—液平衡进行了关联。结果表明,局部组成混合规则优于常规二次混合规则。用所建立的模型对超临界CO_2流体萃取分离乙醇水溶液体系的汽—液平衡进行了关联,计算值与实验值吻合良好。
A new density-dependent local composition mixing rule for Patel-Teja equation of state is proposed. It gives better correlation than the classical eqadratic mixing rule for VLE data of more than ten systems, including nonpolar, polar and associated systems. In addition, VLE data for the extraction of ethnaol from ethanol-water mixture with supercritical carbon dioxide are also correlated and the calculated values are in good agreement with the experimental data.
出处
《石油大学学报（自然科学版）》
CSCD
1990年第5期56-65,共10页
Journal of the University of Petroleum,China(Edition of Natural Science)
关键词
状态方程
汽液平衡
乙醇
水溶液
State equation
Vapor-liquid equilibrium
Mixing rule Supercritical extraction
