Simple modification of the temperature dependence of the Sanchez-Lacombe equation of state

Hiroshi Machida, Yoshiyuki Sato, Richard Lee Jr. Smith

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

In this work, the interaction energy term of the Sanchez-Lacombe equation of state (SL EOS) was modified to take into account the temperature dependence of hydrogen bonding and ionic interactions. A simple function was used in the form of the Langmuir equation that reduces to the original SL EOS at high temperature. Comparisons are shown between the e{open}*-modified SL EOS and the original SL EOS. The e{open}*-modified SL EOS could represent volumetric data for the group of non-polar fluids, polar fluids and ionic liquids to within an absolute average deviation (AAD) of 0.85%, 0.51%, and 0.054%, respectively whereas, the original Sanchez-Lacombe EOS gave AAD values of 0.99%, 1.2%, and 0.21%, respectively. The e{open}*-modified SL EOS provides remarkably better PVT representation and can be readily applied to mixtures.

Original languageEnglish
Pages (from-to)205-209
Number of pages5
JournalFluid Phase Equilibria
Volume297
Issue number2
DOIs
Publication statusPublished - 2010 Oct 1

Keywords

  • Correlation
  • Ionic liquid
  • Liquid densities
  • Sanchez-Lacombe equation of state

ASJC Scopus subject areas

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

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