指数型混合則を用いた正則溶液モデルによる極性分子を含む混合物の気液平衡の相関

Correlation of vapor−liquid equilibria of mixtures containing polar molecules by regular solution model with exponent−Type mixing rule

Creators Kobuchi Shigetoshi

Creators Yonezawa Setsuko

Creators Fukuchi Kenji

Creators Arai Yasuhiko

An extended regular solution model, in which an exponent.type mixing rule is introduced to the interaction term and a composition.dependent interaction parameter between unlike molecules is adopted, has successfully been applied to correlate vapor.liquid equilibria (VLE) of mixtures containing polar molecules. It is found that the exponent parameter is effective to represent VLE of polar systems such as ethanol + hydrocarbon binary systems. However, it is noted that the activity coefficient equations derived from the regular solution model become inadequate in the infinite dilution condition according to the exponent parameter. The behavior of activity coefficients in the extremely dilute region is discussed.