| Mechanical and Energy Engineering |
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| Extension of LCVM-Type mixing rule to three-parameter equations of state for vapor-liquid equilibria of mixtures |
| HAN Xiao-hong, CHEN Guang-ming, WANG Qin, CUI Xiao-long |
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Abstract In this paper, the LCVM mixing rule is extended to the multi-parameter equations of state by combining infinite-pressure and zero-pressure mixing rule models. The new LCVM-type mixing rule, coupled with Patel-Teja equation of state (EOS) is applied for vapor-liquid equilibria of different polar and non-polar systems in which the NRTL activity coefficient model is used to calculate the excess Gibbs free energy. The tested results agree well with existing experimental data within a wide range of temperatures and pressures. In comparison with the Van der Waals mixing rule, the new mixing rule gives much better correlations for the vapor-liquid equilibria of non-polar and polar systems.
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