Simultaneous representation of excess enthalpy and vapor-liquid equilibrium data by the NRTL and UNIQUAC models

Yaşsar Demirel, Hatice Gecegörmez

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Using data for excess Gibbs energy, gE, and enthalpy of mixing, hE, temperature-dependent parameters of the NRTL and UNIQUAC models have been estimated for 44 systems of binary mixtures. Thirty-three of them include data for gE and hE at more than one different isotherm. The estimated parameters were later tested by predicting the total pressure, vapor-phase compositions and gE and hE data simultaneously and presenting the effect of temperature on such data. System-dependency of the models, non-uniqueness in the parameters and the possibility of predicting partial miscibility for completely miscible non-ideal mixtures have been investigated.

Original languageEnglish (US)
Pages (from-to)111-133
Number of pages23
JournalFluid Phase Equilibria
Volume65
Issue numberC
DOIs
StatePublished - 1991

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liquid-vapor equilibrium
Phase equilibria
Enthalpy
enthalpy
Gibbs free energy
Binary mixtures
Vapor pressure
Phase composition
Isotherms
Solubility
Temperature
binary mixtures
isotherms
solubility
vapor phases
temperature
energy

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Simultaneous representation of excess enthalpy and vapor-liquid equilibrium data by the NRTL and UNIQUAC models. / Demirel, Yaşsar; Gecegörmez, Hatice.

In: Fluid Phase Equilibria, Vol. 65, No. C, 1991, p. 111-133.

Research output: Contribution to journalArticle

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