INVESTIGADORES
ZABALOY Marcelo Santiago
artículos
Título:
A Flexible Mixing Rule Satisfying the Ideal-Solution Limit for Equations of State
Autor/es:
M.S. ZABALOY; E.A.BRIGNOLE; J. H. VERA
Revista:
INDUSTRIAL & ENGINEERING CHEMICAL RESEARCH
Editorial:
AMER CHEMICAL SOC
Referencias:
Lugar: Washington; Año: 2002 vol. 41 p. 922 - 930
ISSN:
0888-5885
Resumen:
While the ideal solution is an important reference for the thermodynamic modeling of mixtures,
the one-fluid approach for equations of state (EOSs) fails to meet this limit. In this work we
present additional evidence supporting this fact. A conceptually new treatment previously
proposed for EOSs that meets the ideal solution limit at zero values for the interaction parameters
is further developed here. A flexible composition dependence is proposed to cover the entire
spectrum from symmetrical to highly asymmetrical, highly nonideal, mixtures. The new
composition dependence gives the ideal solution limit, and it accounts for the effect of density
on the excess properties of nonideal mixtures. The model treats vapor and liquid phases using
a single formalism. For vapor-liquid equilibrium calculations, the new mixing rule can be
considered as a hybrid between the well-known æ-æ and ç-æ approaches.