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PRSV: An improved peng—Robinson equation of state for pure compounds and mixtures
Author(s) -
Stryjek R.,
Vera J. H.
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.5450640224
Subject(s) - acentric factor , equation of state , polar , thermodynamics , vapor pressure , binary number , gibbs free energy , cubic function , chemistry , flory–huggins solution theory , mixing (physics) , binary system , vapor–liquid equilibrium , organic chemistry , mathematics , physics , mathematical analysis , arithmetic , quantum mechanics , astronomy , polymer
Abstract The temperature and acentric factor dependence of the attractive term of the Peng—Robinson equation of state have been modified. The introduction of a single pure compound parameter allows the accurate reproduction of the vapor pressure data for a wide variety of substances. Nonpolar, polar nonassociating and associating compounds are equally well represented by the cubic PRSV equation of state. The conventional one‐binary‐parameter mixing rule allows the correlation of the vapor—liquid equilibrium data for a wide variety of binary systems. Only for systems formed by a polar compound (associating or not) and a saturated hydrocarbon, are results poorer than those obtained with conventional excess Gibbs energy functions.