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A study of vapour‐liquid equilibria for the binary mixtures hcfc22/cfc114, hcfc22/hcfc142b and hcfc22/hfc152a
Author(s) -
Ström Krister H. U.,
Grén Urban B.
Publication year - 1993
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450710616
Subject(s) - thermodynamics , materials science , equation of state , activity coefficient , mixing (physics) , binary number , chemistry , physics , aqueous solution , mathematics , quantum mechanics , arithmetic
Abstract Experimental data for vapour liquid equilibrium for the three non‐azeotropic mixtures HCFC22ICFC114 (CHClF z /C z Cl z F 4 ), HCFC22IHCFC142b (CHClF z /C z,/ H 3 ClF z ) and HCFC221HFC152a (CHClF z /C z H 4 F z ) and vapour pressure for the pure components have been measured in pressure range up to 1.8 MPa. In a comparative study the deviations between experimental and calculated data for three correlation methods are presented. The three methods are the equations of state according to Lee‐Kesler (1975) and Carnahan‐Starling‐de Santis (1976) and the activity coefficient model by Wilson (1964). Interaction parameters have been fitted from experimental data to the mixing rules proposed to the two equations of state and the activity coefficient parameters have been determined in the Wilson (1964) model. All three methods studied give good conformity with experimental data for the three mixtures examined.