Development of a Universal Group Contribution Equation of State. 2. Prediction of Vapor-Liquid Equilibria for Asymmetric Systems

摘要: The PSRK method is a well-established group contribution equation of state (GCEOS) for the prediction vapor−liquid equilibria (VLE) and other properties. A generalized GCEOS has been developed to overcome still remaining weaknesses model, which great interest industrial chemistry. volume-translated Peng−Robinson (PR) (EOS) combined with UNIFAC by means simple gE mixing rule, derived from one. In this new GCEOS, Flory−Huggins term mixing-rule combinatorial part model are skipped simultaneously, leads much better description asymmetric systems. predictions further improved using quadratic rule parameter b an exponent 3/4 binary bij in combination rule. Temperature-dependent interaction parameters fitted VLE over wide range temperature pressure. results n...