不同温度DMF-正庚烷-甲苯体系液-液平衡的关联

Liquid-Liquid Equilibria Correlation of DMF-n-Heptane-Toluene System at Different Temperatures

本文对六个温度下DMF-正庚烷-甲苯体系的液-液平衡进行了等温和非等温情况下的关联。本文用NRTL、UNIQUAC等六种活度系数模型进行了关联,并提出一个修正的Wilson活度系数模型,修正了温度对活度系数的贡献。本文提出的活度系数模型能够较好地同时关联不同温度下的液-液平衡。计算误差明显小于进行温度修正后的NRTL等模型,参数也较后者为少。

In this paper, liquid-liquid equilibria (LLE) of DMF-n-heptane-toluene system at six temperatures were correlated with NRTL, UNIQUAC, et al. A modified Wilson activity coefficient model was presented by the authors. This new model corrected the contributions of composition and temperature to activity coefficient. This model showed excellent accuracy in correlating the LLE at different temperatures simultaneously.