Journal
FLUID PHASE EQUILIBRIA
Volume 228, Issue -, Pages 121-126Publisher
ELSEVIER
DOI: 10.1016/j.fluid.2004.08.013
Keywords
equation of state; vapor-liquid equilibria; liquid-liquid equilibria; solid-liquid equilibria; multicomponent; association
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The cubic-plus-association equation of state (CPA EoS) has been extended to phase equilibria of industrially important binary mixtures of alcohol-hydrocarbon, alcohol/glycol-water systems and mixtures with organic acids. The ability of the model to predict different types of equilibria was tested. Very satisfactory VLE and SLE prediction is achieved for alcohol-hydrocarbon systems, while the sensitivity of the LLE to the interaction parameter is demonstrated. It has been shown that CPA can perform VLE/LLE/SLE calculations in the case of alcohol-hydrocarbon binary systems with a single interaction parameter. Satisfactory SLE correlation of alcohol/glycol-water systems is achieved using a single interaction parameter over an extended temperature range. Moreover, satisfactory prediction was achieved for the multiphase equilibria of the mixture acetic acid-water-hexane based solely on binary interaction parameters. (c) 2004 Elsevier B.V. All rights reserved.
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