利用二元水溶液的水活度数据预测混合水溶液的水活度

• 作 者: 刘艳升 徐春明 胡玉峰 严骏
• 机 构: State Key Laboratory of Heavy Oil Processing,High Pressure Fluid Phase Behavior & Property Research
• 出 处: 中国化学工程学报（英文版）
• 发表日期: 2004年期
• 关键词: prediction water activity aqueous mixed solution linear isopiestic relation the
• 基金项目: 国家自然科学基金

The equation of Patwardhan and Kumar for water activities of mixed electrolyte solutions is extended to aqueous solutions containing non-electrolytes. This equation and the linear isopiestic relation are used to predict water activities of 56 ternary aqueous solutions in terms of the data of their binary subsystems. Both equation of Patwardhan and Kumar and the linear isopiestic relation can provide good predictions for water activities of the present 40 electrolyte solutions, and the linear isopiestic relation generally yields better predictions. The predictions of the extended equation of Patwardhan and Kumar and the linear isopiestic relation are in general quite reasonable for the present 8 ternary solutions of electrolytes and non-electrolytes, and the results of the linear isopiestic relation are usually better. The predictions of these two methods generally agree well with the experimental data for the 8non-electrolyte mixtures being studied, and the linear isopiestic relation is better.