混合溶剂-盐体系的汽液平衡

以扰动理论为基础建立了含电解质混合溶剂体系的状态方程。用其计算了五个甲醇-水-盐体系的汽液平衡。参数由拟合蒸汽压、密度和离子平均活度系数数据获得。当应用到三元体系时(只用一个可调二元参数),状态方程预测蒸汽压的平均相对误差小于2.3％,汽相组成的平均绝对误差小于0.017。

VLE OF MIXED SOLVENT-SALT SYSTEMS

Based on perturbation theory, an EOS is established for the mixture containing electrolytes in the mixed solvent. Calculations are performed for the five ternary systems methanol-water-salt. Parameters are fitted to vapor pressure, density and mean ionic activity coefficient data. When the EOS proposed is applied to the ternary systems, using only binary binary parameters, the vapor pressures and compositions are predicted with an average relative deviation less than 2.3％ and an average absolute deviation less than 0. 017 respectively.