Prediction of Activity Coefficients for Mixed Aqueous Electrolyte Solutions from the Data of Their Binary Solutions  

由二元亚系的数据预测混合电解质水溶液的活度系数

作　　者：刘植昌 刘艳升 胡玉峰 曾鹏 樊栓狮 梁德青 

机构地区：[1]State Key Laboratory of Heavy Oil Processing and High Pressure Fluid Phase Behavior ＆ Property Research Laboratory, China University of Petroleum, Beijing 102200, China [2]Laboratory of Gas Hydrates ＆ High-Pressure Fluids, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510070, China

出　　处：《Chinese Journal of Chemical Engineering》2006年第4期494-504,共11页中国化学工程学报（英文版）

基　　金：the National-Natural Science Foundation of China （No.20476059, No.20276037） and 863 Hi-Technology Research and Development Program of China （2004 AA616040）.

摘　　要：The simple equation relating the activity coefficient of each solute in mixed electrolyte solution to its value in binary solutions under isopiestic equilibrium was tested by comparison with the experimental data for the 18 electrolyte solutions consisting of 1：1, 1：2, and 1：3 electrolytes. The isopiestic measurements were made on the quaternary system BaCl2-NH4Br-NaI-H2O and its ternary subsystems NaI-NH4Br-H2O, NaI-BaCl2-H2O, and NH4Br-BaCl2-H2O at 298.15K. The results were used to test the applicability of the Zdanovskii＇s rule to the mixed electrolyte solutions which contain no common ions, and the agreement is excellent. The activity coefficients of the solutes in the above quaternary and ternary systems calculated from the above-mentioned simple equation are in good agreement with the Pitzer＇s equation.

关 键 词：electrolyte solution activity coefficient isopiestic measurement the Zdanovskii＇s rule the Pitzer＇s equation 

分 类 号：O646.1[理学—物理化学]