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Model for phase equilibria correlation and prediction. Characteristics and application to binary liquid—vapor and binary, ternary and quaternary liquid—liquid equilibria
Author(s) -
Beviá F. Ruiz,
Zapata R. Ruiz,
Gomis A. F. Marcilla,
Rico D. Prats
Publication year - 1986
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.5450640223
Subject(s) - uniquac , non random two liquid model , ternary operation , thermodynamics , binary number , isothermal process , gibbs free energy , liquid liquid , chemistry , activity coefficient , mathematics , chromatography , physics , computer science , arithmetic , aqueous solution , programming language
A new model for the excess Gibbs energy has been developed. The model has three binary parameters. The presence of the third parameter, k ij , the power of the composition, gives to the model an extraordinary flexibility. The model has been widely tested for different types of equilibria, such as binary liquid‐vapour equilibria, both isothermal and isobarid; as well as on liquid‐liquid equilibria, binary, ternary and quaternary, for both correlation and prediction. Results obtained for the average errors were always lower than those obtained by the Van Laar, Wilson and UNIQUAC models, and even by a three parameter model such as NRTL.