FLUID MIXTURES AT HIGH-PRESSURE - PHASE SEPARATION AND CRITICAL PHENOMENA IN BINARY-MIXTURES OF A POLAR COMPONENT WITH SUPERCRITICAL CARBON-DIOXIDE, ETHANE, AND ETHENE UP TO 1000 BAR

被引：40

作者：

ALWANI, Z ^{[1
]}

SCHNEIDER, GM ^{[1
]}

机构：

[1] RUHR UNIV BOCHUM,INST PHYS CHEM,D-4630 BOCHUM,FED REP GER

来源：

BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 1976年 / 80卷 / 12期

关键词：

D O I：

10.1002/bbpc.19760801214

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In order to study the polarity effect on the critical phase behavior of fluid binary systems the critical temperatures of binary mixtures of carbon dioxide, ethane, ethene, hexane, or 1-hexene with a second component of very different polarity such as methanol, 2-hexanol, 2-octanol, 2,5-hexanediol, nitromethane, N,N-dimethylformamide, or N-methylacetamide are determined as a function of pressure up to 1000 bar. The critical p(T) curves obtained exhibit a whole pattern of different transition types between liquid-gas, liquid-liquid, and gas-gas equilibria; they are compared with data for other systems taken from the literature. The results verify a previous hypothesis that there are continuous transitions between liquid-gas, liquid-liquid, and gas-gas critical phenomena in fluid binary mixtures at high pressures. The measurements are of interest for fluid extraction and supercritical fluid chromatography (SFC).

引用

页码：1310 / 1315

页数：6