C_8芳烃异构体+异丙醇体系在333.15K时的过量摩尔Gibbs自由能

采用CP-I型汽液平衡双循环釜,测定了333.15 K时乙苯+异丙醇、邻二甲苯+异丙醇、间二甲苯+异丙醇、对二甲苯+异丙醇四个体系的汽液平衡数据,计算了该温度下四个体系的过量摩尔Gibbs自由能,并对所测数据进行了恒温下热力学一致性检验。用Wilson方程关联了实验数据,拟合精度令人满意。

The Molar Excess Gibbs Free Energy of O-, M-, P-Xylene or Ethyl Benzene + 2-Propanol System at 333.15 K

Isothermal vapor-liquid equilibrium data at 333.15K for four systems(ethyl benzene + 2-propanol, o-xylene + 2-propanol, m-xylene + 2-propanol, p-xylene + 2-propanol)were measured by a CP-I still. Pitzer-Curl-Tsonopoulos correlation for accounting the nonideal behavior of the vapor phase and liquid phase was used for calculating the activity coefficient of liquid phase. All of the experimental data have been tested by area method and the results show that the experimental data conform to the demand of thermodynamic consistency. The molar excess Gibbs free energies of above systems have been calculated at 333.15K.The GME values of above four systems are positive, showing positive deviations from ideal solution behavior. Composition and component抯 activity coefficient of liquid phase were correlated with Wilson equation. The calculated values of the vapor composition are in rather good agreements with the experimental data.