ACCURATE EQUATION OF STATE PREDICTIONS AT HIGH-TEMPERATURES AND PRESSURES USING THE EXISTING UNIFAC MODEL

被引：57
作者：
ORBEY, H
SANDLER, SI
WONG, DSH
机构：
[1] UNIV DELAWARE,DEPT CHEM ENGN,CTR MOLEC & ENGN THERMODYNAM,NEWARK,DE 19716
[2] NATL TSING HUA UNIV,DEPT CHEM ENGN,HSINCHU 30043,TAIWAN
来源：
FLUID PHASE EQUILIBRIA | 1993年 / 85卷
关键词：
D O I：
10.1016/0378-3812(93)80003-6
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A recently developed mixing rule for cubic equations of state is combined with the UNIFAC group contribution method to yield a completely predictive thermodynamic model for the vapor-liquid and liquid-liquid phase behavior of slightly and highly non-ideal mixtures over large ranges of temperature and pressure. We find that the quality of predictions is very good for systems for which UNIFAC provides an accurate low pressure description. The mixing rule + UNIFAC model developed is an accurate and very simple extension of the UNIFAC group contribution method to high temperatures and high pressures. Further, since existing UNIFAC parameters are used, no refitting of experimental data is needed.
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页码：41 / 54
页数：14
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