Correlation of heats of mixing data by the NRTL and UNIQUAC models. Part 1. Estimation of the model parameters

Y. Demirel, H. Gecegörmez, H. Ö Paksoy

Research output: Contribution to journalArticle

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Abstract

Using data for heats of mixing hE, temperature dependent parameters of the NRTL and UNIQUAC models have been estimated for 57 systems of binary mixtures. In order to test the models thoroughly, systems of various types, including associating and partially miscible systems, that have data for hE at more than one different isotherm are considered. Temperature dependences of the models are assumed as non-linear. This form of dependence is found to be more suitable for associating systems and for prediction of excess heat capacity CEp from differentiation of a correlation for hE. No fixed values are assumed for the parameters of the models. The physical meanings and non-uniqueness of the parameters are discussed.

Original languageEnglish (US)
Pages (from-to)329-341
Number of pages13
JournalThermochimica Acta
Volume194
Issue numberC
DOIs
StatePublished - Jan 3 1992

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heat
Binary mixtures
binary mixtures
Specific heat
Isotherms
isotherms
specific heat
Temperature
temperature dependence
Hot Temperature
predictions
temperature

ASJC Scopus subject areas

  • Instrumentation
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

Correlation of heats of mixing data by the NRTL and UNIQUAC models. Part 1. Estimation of the model parameters. / Demirel, Y.; Gecegörmez, H.; Paksoy, H. Ö.

In: Thermochimica Acta, Vol. 194, No. C, 03.01.1992, p. 329-341.

Research output: Contribution to journalArticle

Demirel, Y. ; Gecegörmez, H. ; Paksoy, H. Ö. / Correlation of heats of mixing data by the NRTL and UNIQUAC models. Part 1. Estimation of the model parameters. In: Thermochimica Acta. 1992 ; Vol. 194, No. C. pp. 329-341.
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