Combined Helmholtz energy, extended corresponding states and local-composition model for fluid mixtures

J. F. Estela-Uribe, A. De Mendoza, J. P.M. Trusler

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3 Citas (Scopus)

Resumen

We present a thermodynamic model of mixtures in which the Helmholtz energy is computed from an extended corresponding states (ECS) method with a correction term. The ECS model is based upon the van der Waals one-fluid theory with pure-component shape factors represented as functions of reduced temperature and density. The correction term is given by a local-composition model with a coordination number taken from lattice gas theory. Densities and speeds of sound of binary mixtures were calculated with deviations within ±0.20%, while deviations in bubble-point pressures were within ±2% on average.

Idioma originalInglés
Páginas (desde-hasta)25-30
Número de páginas6
PublicaciónFluid Phase Equilibria
Volumen222-223
DOI
EstadoPublicada - 15 ago. 2004

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