Two- and three-phase equilibria and critical locus for the system of HCFC22-HFC134a

Vapor-liquid equilibrium data for the system of chlorodifluoromethane (HCFC22)-1,1,1,2-tetrafluoroethane(HFC134a) were obtained at 343.81, 356.15, 369.15, 370.15 and 372.12 K. Composition difference between vapor and liquid phases was very small. We found a three-phase equilibrium region at higher t...

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Bibliographic Details
Published in:Fluid phase equilibria 1993, Vol.83, p.109-117
Main Authors: Nishiumi, Hideo, Komatsu, Masahiro, Yokoyama, Taichirou, Kohmatsu, Satoshi
Format: Article
Language:English
Subjects:
Chemistry
data
Exact sciences and technology
experiments
General and physical chemistry
HCFC134a
HCFC22
HCFC22-HCFC134a
Liquid-vapor equilibria
Phase equilibria
VLE high pressure
VLLE high pressure
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Summary:Vapor-liquid equilibrium data for the system of chlorodifluoromethane (HCFC22)-1,1,1,2-tetrafluoroethane(HFC134a) were obtained at 343.81, 356.15, 369.15, 370.15 and 372.12 K. Composition difference between vapor and liquid phases was very small. We found a three-phase equilibrium region at higher temperatures than the critical temperature of HCFC22. Using a more precise temperature controlling apparatus, phase boundary data for the three-phase equilibrium and the critical locus were successfully determined.
ISSN:0378-3812
1879-0224
DOI:10.1016/0378-3812(93)87013-Q