A phase stability analysis of the combinatorial term of the UNIQUAC model

Charlles R A Abreu, Marcelo Castier, Frederico W. Tavares

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The conditions for the onset of liquid-phase instability in the combinatorial contribution of UNIQUAC are discussed. A peculiar and non-physical aspect of this predicted instability is that it is independent of temperature. It is recognized that by renormalizing the r and q parameters, this type of phase transition can be prevented.

Original languageEnglish
Pages (from-to)893-896
Number of pages4
JournalChemical Engineering Science
Volume54
Issue number7
DOIs
Publication statusPublished - Apr 1999
Externally publishedYes

Fingerprint

Phase stability
Stability Analysis
Term
Phase Transition
Phase transitions
Liquid
Liquids
Model
Temperature

Keywords

  • Excess free energy models
  • Phase equilibria
  • Phase stability
  • Polymers
  • UNIFAC
  • UNIQUAC

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

A phase stability analysis of the combinatorial term of the UNIQUAC model. / Abreu, Charlles R A; Castier, Marcelo; Tavares, Frederico W.

In: Chemical Engineering Science, Vol. 54, No. 7, 04.1999, p. 893-896.

Research output: Contribution to journalArticle

Abreu, Charlles R A ; Castier, Marcelo ; Tavares, Frederico W. / A phase stability analysis of the combinatorial term of the UNIQUAC model. In: Chemical Engineering Science. 1999 ; Vol. 54, No. 7. pp. 893-896.
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