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从过量热力学性质求汽液平衡数据
Calculation of Vapor-Liquid Equilibrium Data from Excess Thermodynamic Properties
【摘要】 从两组或两组以上不同温度的过量焓数据以及一组恒温蒸汽压数据出发,基于溶液对应状态原理,提出了一套计算汽液平衡数据的程序:(1)根据溶液对应状态原理求过量焓H~E;(2)求Gibbs过量自由能G~E或其函数Q;(3)求泡点;(4)求汽液平衡数据。对苯-环己烷,苯-正己烷,苯-正庚烷,苯-正辛烷,四氯化碳-苯,四氯化碳-环己烷和四氯化碳-正庚烷的计算结果,与相应的汽液平衡实验值比较,相当满意。因此,本计算程序对于低压下的非极性或弱极性二元系统是适用的。
【Abstract】 Starting from non-isothermal excess enthalpy data (two or more than two sets) and isothermal vapor pressure data (one set), and based on the principle of corresponding states of solutions, a complete computation procedure of vapor-liquid equilibrium data is proposed.(1) Calculation of excess enthalpy HE, based on the principle of corresponding states of solutions;(2) Calculation of Gibbs free energy GE or its Q function;(3) Calculation of bubbling point;(4) Calculation of vapor-liquid equilibrium data.The computation results for benzene-cyclohexane, benzene-n-hexane, benzene-n-heptane, benzene-n-octane, carbon tetrachloride-benzene, carbon tetrachloride-cyclohexane and carbon tetrachloride-n-heptane, compared with the corresponding vapor-liquid equilibrium experimental data are quite satisfactory. The proposed computation procedure is appropriate to non-polar and slightly polar binary systems under relatively low pressures.
- 【文献出处】 化工学报 ,Journal of Chemical Industry and Engineering(China) , 编辑部邮箱 ,1980年02期
- 【被引频次】8
- 【下载频次】79