乙醇-乙酸丁乙酯、环己烷-异丙醇二元系统的等温汽液平衡

ISOTHERMAL VAPOR LIQUID EQUILIBRIUM FOR ETHANOL n BUTYLACETATE AND CYCLOHEXANE 2 PROPANOL BINARY SYSTEMS

应用液上气相色谱法分别测定了乙醇－乙酸丁酯、环己烷－异丙醇两个二元系统在不同温度下的等温汽－液平衡数据，经检验数据均满足热力学一致性要求．采用单纯形法分别优化出上述两个二元系统在不同温度范围内的ＮＲＴＬ、Ｗｉｌｓｏｎ两种模型参数．为了拓宽两个二元系统模型参数的温度适用范围，拟合时将文献中相同二元系统在其它温度下的汽液平衡数据与所测定的汽液平衡数据一起关联，并把ＮＲＴＬ、Ｗｉｌｓｏｎ模型参数均表示为温度的函数，拟合精度较好．

Isothermal VLE data for ethanol n butylacetate and cyclohexane 2 propanol two binary systems at various temperatures have been measured with the method of headspace chromatography. The thermodynamic consistency of the T x y data has been tested by the Herington area test method. The checked results conform the requirement of thermodynamic comsistency. The parameters of NRTL、Wilson model for the two binary systems have been respectively optimized by the simplex method according to both the experimental VLE data in this paper and the data published in literature for each system. They were expressed as a function of the temperature in certain range of temperatures. Correlation results were satisfactory.