2,2-二甲基丁烷+乙醇、+正丙醇二元体系常压汽液平衡的测定

摘要

A double circulating vapor liquid equilibrium apparatus was designed and established.Isobaric vapor liquid equilibrium of two binary systems 2,2-dimethylbutane + ethanol and 2,2-dimethylbutane + 1-propanol at 1 atmosphere was measured.The experimental data passed integral thermodynamic consistent test.NRTL equation was used to correlate the vapor liquid equilibrium data of the binary system to obtain the model parameters.With the parameters,vapor composition was calculated and compared with the corresponding experimental data.The average deviations between calculated and experimental vapor composition were less than 0.02.The result showed that NRTL model was applicable for these two binary systems.%使用自行设计的汽液平衡釜测定了常压下2,2-二甲基丁烷+乙醇和2,2-二甲基丁烷+正丙醇二元体系的汽液平衡数据,所得到的汽液平衡数据通过了Herrington面积法热力学一致性检验.实验数据用NRTL方程进行关联,采用关联得到的模型参数计算相应的汽相组成,并与实验值比较.汽相组成的平均偏差小于0.02,这说明NRTL模型适用于所研究的二元体系.