Critical locus and vapor-liquid equilibria of HFC32-HFC125 system

被引：14
|
作者：
Kato, R [1 ]
Shirakawa, K [1 ]
Nishiumi, H [1 ]
机构：
[1] Hosei Univ, Chem Engn Lab, Tokyo 1848584, Japan
来源：
FLUID PHASE EQUILIBRIA | 2002年 / 194卷
关键词：
vapor-liquid equilibria; critical locus; fluorocarbon; HFC32; HFC125; mixture; pure; BWR equation of state; binary interaction parameter;
D O I：
10.1016/S0378-3812(01)00788-9
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
We measured vapor-liquid equilibria (VLE) and critical locus for the system of difluoromethane (HFC32)-pentafluoroethane (HFC125) ranging from 318.15 to 349,15 K. Composition differences between vapor and liquid phases on the P-(x-y) diagram were very small. The critical locus can be classified as type I behavior according to the system of van Konynenburg-Scott. The system of HFC32 and HFC125 is unusual in that the larger component in molecular weight has a lower critical temperature and vapor pressure than the smaller component. Using binary interaction parameter m(ij) expressed as a linear function of composition and temperature. we obtained excellent correlation of the experimental data with an extended BWR equation of state. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：995 / 1008
页数：14
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