Lattice fluid theories for mixtures in a component-specific cell volume framework

Chul Soo Lee, Jung Won Kang, Ju Ho Lee, Hwayong Kim

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Lattice fluid models with temperature-independent segment number, interaction energy and component-specific cell volume are in use to represent pure component physical properties conveniently and accurately. However, the formulation of mixtures from pure components calls for a new lattice different from constituting pure components and a consistent method has not been presented so far. In the present study Helmholtz free energy was derived based on well-defined assumptions for physically interacting lattice fluid mixtures and was obtained in terms of pure component parameters and a new combining rule for energy parameter. When applied to azeotropic mixtures and mixtures with light components for a wide range of pressures, the free energy with the new combining rule was found to show general improvements.

Original languageEnglish
Pages (from-to)280-285
Number of pages6
JournalFluid Phase Equilibria
Issue number1-2
Publication statusPublished - 2007 Dec 15


  • Cell volume
  • Combining rule
  • Equation of state
  • Lattice fluid

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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