乙苯或o-,m-,p-二甲苯+正丙醇体系活度系数和混合自由能的测定

Measurement on the Activity Coeficient and the Mixture Free Energy of Ethyl Benzene or o-,m-,p-Xylene and n-Propyl Alcohol

用自制的汽液平衡釜测定了正丙醇+乙苯或o-二甲苯、m-二甲苯、p-二甲苯4个二元液系在压力为99.80 kPa时的等压汽液平衡数据,并进行了热力学一致性检验.用UNIQUAC模型处理实验数据,得出了活度系数和混合自由能.上述研究不仅充实了二元液系混合体系的实验数据,还为其热力学研究提供了丰富的理论依据.

Vapor liquid equilibrium data of n-propyl alcohol and ethyl benzene, n-propyl alcohol and o-xylene, n-propyl alcohol and m-xylene, n-propyl alcohol and p-xylene were determined respectively by a self-made kettle at 99.80 kPa. All experimental data were tested by the method proposed by Herington. The results showed that the data conformed to the demand of thermody-namic consistency. Data processed by the UNIQUAC modle was used to calculate the activity coefficient and the mixture free energy of liquid phase. It is not only to replenish data stock but also to enrich the theoretical basis on thermodynamic study for the two liquids mixture system.