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用气相色谱法测定了苯及噻吩在各种溶剂中无限稀释条件下的活度系数、选择性、溶解度和相对挥发度,综合比较,其中NMP(N-甲基吡咯烷酮)的性能较好。用改进的鼓泡平衡斧测定了苯-噻吩-NMP的二元和三元系等温汽液平衡数据,并通过热力学一致性检验。二元系数据用Wilson方程关联,三个二元系的汽相摩尔组成的总绝对平均偏差|△y|为0.0010,三元系的Wilson方程推算值与实测值的|△Y|为0.0064。
The activity coefficient, selectivity, solubility and relative volatility of benzene and thiophene under infinite dilution in various solvents were determined by gas chromatography. Among them, NMP (N-methylpyrrolidone) showed better performance. Binary and ternary isothermal vapor-liquid equilibrium data of benzene-thiophene-NMP were determined with a modified bubbling balance axiom and tested by thermodynamic consistency. The binary data was correlated with the Wilson equation. The total absolute mean deviation of || y | of the vapor phase moles of the three binary systems was 0.0010. The estimated | ΔY value of the Wilson equation for the ternary system was 0.0064.