合成分子筛Na^+-K^+离子交换热力学的研究  

Research on Thermodynamics of Na^+-K^+ Ion Exchange on the Synthetic Molecular Sieve

作　　者：张林栋[1] 赵亮[1] 袁俊生[1] 纪志永[1] 舍容[1] 

机构地区：[1]河北工业大学化工学院,天津300130

出　　处：《盐业与化工》2008年第4期15-18,共4页Jounral of Salt and Chemical Industry

基　　金："十五"国家科技攻关项目(编号:2006BA03A10-01)

摘　　要：通过测定对钾离子全交换容量为189.74mmol/100g的合成分子筛Na+-K+离子交换等温线,绘制k ielland图,并回归出Langmu ir模型,依据热力学平衡原理,导出了粒状合成分子筛Na+-K+离子交换过程平衡常数表达式,并计算出该过程的焓、吉布斯自由能和熵变化。进一步验证了合成分子筛Na+-K+离子交换过程的自发性,且为放热反应,低温有利于钾离子的吸附。The cation exchange capacity of the synthetic molecular sieve in pure potassium is 189.74mmol/100g. We protracted the Na^＋ - K^＋ ion exchange isotherm, Kielland diagram and Langmuir model was simulated. According to thermodynamic equilibrium theory, the expression of Na^ ＋ - K ^＋ ion exchange equilibrium constant was deduced and enthalpy, Gibbs free energy and entropy were figured out. Furthermore we proved that the process is unprompted and the exothermic reaction, and the low temperature is advantageous to potassium absorption.

关 键 词：合成分子筛 钾 离子交换 热力学 

分 类 号：TQ425.9[化学工程]