Abstract
The Wong-Sandler mixing rule was extended to the Patel-Teja three-parameter cubic equation of state by introducing suitable corresponding parameters. The new model, PT–WS model, has been extensively tested on various classes of binary/ternary mixtures, special attention was paid to the effects on the representation of mixture phase behavior in the near-critical region. The test results indicate that the new model is capable of improving both the vapor–liquid equilibrium and volumetric properties significantly, especially for highly asymmetric systems. The proposed method of implementing the Wong-Sandler mixing rule can be applied to other multi-parameter cubic equations of state.
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