热力学模型研究KNO_3-K_2SO_4-H_2O和KNO_3-KCl-H_2O体系溶解度  

Solubility Prediction of System KNO_3-K_2SO_4-H_2O and KNO_3-KCl-H_2O Using Thermodynomic Model

作　　者：尹霞[1] 吴玉双[1] 汪琼[1] 

机构地区：[1]湖南大学化学化工学院,长沙410082

出　　处：《无机化学学报》2011年第1期73-78,共6页Chinese Journal of Inorganic Chemistry

基　　金：湖南大学"中央高校基本科研业务费"资助项目

摘　　要：用Pitzer-Simonson-Clegg热力学模型(PSC模型),分别拟合KCl-H2O、K2SO4-H2O、KNO3-H2O体系以及KNO3-K2SO4-H2O和KNO3-KCl-H2O体系水活度和溶解度实验数据,得到二元参数和三元离子相互作用参数,并以此计算3个二元盐水体系溶解度相图,及2个三元盐水体系在不同温度下的溶解度,结果表明计算值与实验值一致。The solubilities of the KNO3-K2SO4-H2O and KNO3-KCl-H2O systems was predicted over a wide range of temperature by using Pitzer-Simonson-Clegg（PSC） model.The experimental water activity and experimental solubility in the binary KCl-H2O,K2SO4-H2O,KNO3-H2O and ternary KNO3-K2SO4-H2O and KNO3-KCl-H2O system were used to obtain the model parameters.Then the solubilities in the two ternary systems were predicted and compared with the experimental data.It showed that the model values are credible.

关 键 词：热力学模型 溶解度 KNO3-K2SO4-H2O体系 KNO3-KCl-H2O体系 水活度 

分 类 号：O642.4[理学—物理化学]