四甘醇-水、四甘醇-间二甲苯体系常压汽液平衡数据的测定和关联

Determination and Correlation of Isobaric Vapor-Liquid Equilibria Data for Tetraethylene Glycol-Water and Tetraethylene Glycol-m-Xylene Systems

用CP -I型汽液循环式沸点仪测定了四甘醇 -水和四甘醇 -间二甲苯体系的常压汽液平衡数据。用维里方程计算汽相的逸度系数 ,分别用vanLaar方程、Wilson方程、NRTL方程和UNIQUAC方程等活度系数方程对沸点进行了关联 ,得到了各方程的参数 ,并对各方程的计算结果进行了比较。

Isobaric vapor-liquid equilibrium data were determined at 101 33 kPa for the binary mixtures of tetraethylene glycol-water,and tetraethylene glycol- m -xylene.Fugacity coefficients of the vapor phase were calculated from the virial equation.For liquid phase,activity coefficients using four models (van Laar,Wilson NRTL and UNIQUAC) with their respective binary mixtures were regressed from the experimental data.A comparison of model results is made by root mean square deviations of boiling point data.