Vapor-liquid equilibria predictions at high-pressures with the Huron-Vidal mixing rule

Document Type

Article

Publication Date

9-15-2001

Abstract

In this work we propose an equation of state (EoS) framework that uses the Huron-Vidal (HV) mixing rule to correlate binary low-pressure vapor-liquid equilibria (VLE) for several non-ideal mixtures. The parameters from the data reduction procedure are used for VLE predictions at high-pressures. The EoS applied is the Stryjek-Vera modification of the Peng-Robinson model. The excess Gibbs energy (GE) model incorporated in the HV mixing rule is based on one-fluid theory. Two parameters are assigned per binary mixture. The binary mixture size parameter is replaced by the mean of the pure component molecular size parameters. A single energy parameter is assigned per binary pair, which is regressed from low-pressure experimental data. Good predictions of the model are shown for VLE at high temperatures and pressures and for a few ternary systems. A physical interpretation of the energy parameters is revealed in terms of the relative strength of like to unlike interactions in the mixture. A comparison for two ternary systems is shown with the Reformulated Wong-Sandler (RWS) [AIChE J. 32 (1992) 671] mixing rule in its predictive form. Copyright © 2001 Elsevier Science B.V.

Identifier

0035884622 (Scopus)

Publication Title

Fluid Phase Equilibria

External Full Text Location

https://doi.org/10.1016/S0378-3812(01)00522-2

ISSN

03783812

First Page

1

Last Page

14

Volume

187-188

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