A G(E) EQUATION OF STATE MIXING RULE FOR VAPOR-LIQUID-EQUILIBRIA

A new excess Gibbs free energy/equation of state type mixing 0rule war derived by removing the infinite pressure boundary condition imposed Ly Wong and Sandler. The mixing rule was extensively tested in terms o i a comprehensive data base, consisting of 52 simple nonpolar-nonpolar , carbon dioxide containing, hydrocarbon-hydrocarbon, CFC, polar-polar , nonpolar-polar binary and multicomponent systems. focused on the com plete predictive capability, a comparison between the Wong-Sandler and the mixing rule proposed was conducted. The results indicate that the new mixing rule is in general superior to the Wong-Sandler's, and the binary interaction parameter as required by the latter is removed, wh ich reduces computing effort and is reliable in predictions of vapor-l iquid equilibria rom low pressures Lo high pressures.