Three-phase liquid-liquid-gas equilibrium in the ternary system of trans-decalin-n-decane-carbon dioxide

J. M. Ritter, A. M.F. Palavra, C. P. Chai Kao, M. E. Paulaitis

Research output: Contribution to journalArticle

Abstract

Three-phase, liquid-liquid-gas (LLG) equilibrium behavior was studied for the ternary system trans-decalin-n-decane-CO2. A stoichiometric technique was used to obtain equilibrium phase compositions and molar volumes over a range of temperatures and pressures from the critical point of CO2 to the tricritical point of the ternary mixture. The Peng-Robinson equation of state was found to describe the pressure-temperature (PT) projection of the LLG equilibrium region for this ternary mixture with quantitative accuracy, and provides a reasonable fit of phase compositions and molar volumes. The effects of scaling near mixture critical points and inadequate mixing rules are shown to be the primary limitations to more accurate descriptions of multiphase equilibria.

Original languageEnglish (US)
Pages (from-to)173-191
Number of pages19
JournalFluid Phase Equilibria
Volume55
Issue number1-2
DOIs
StatePublished - 1990
Externally publishedYes

ASJC Scopus subject areas

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

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