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在前人工作的基础上,改进了液上空间气相色谱测活度系数的方法,实验测定了TBP.稀释剂和水形成的多个二元系、三元系和四元系的活度系数和密度.选用的稀释剂有n-C_6H_(14)、n-C_7H_(16)、n-C_8H_(18)、C_6H_6、cy-C_6H_(12)、CCl_4和CHCl_3.在Pierotti 理论的基础上,采用新的硬球作用表达式和径向分布函数,并计及分子间的排斥能、色散能、取向能和诱导能,建立了简单的活度系数模型,并用于TBP 和稀释剂体系的计算.从二元系回归得到的分子参数较好地预测了三元系的活度系数.
Based on the previous work, the method of measuring the gas chromatographic activity coefficient of liquid space was improved, and the activity coefficients of several binary, ternary and quaternary systems formed by TBP, diluent and water were experimentally determined And density.The n-C_6H_ (14), n_C_7H_ (16), n_C_8H_ (18), C_6H_6, cy-C_6H_ (12), CCl_4 and CHCl_3 were selected as the diluents.On the basis of Pierotti theory, New hard-sphere and radial distribution functions, and taking into account the repulsion energy, dispersion energy, orientation energy and induced energy among molecules, a simple activity coefficient model was established and used in the calculation of TBP and diluent systems. The molecular parameters obtained from the regression of the binary system better predict the activity coefficient of the ternary system.