质子交换膜在空气中的热分解动力学  

Thermal decomposition kinetics of proton-exchange membrane in air atomsphere

作　　者：鲁伊恒[1] 邵群[1] 徐国财[1] 李寒旭[1] 

机构地区：[1]安徽理工大学化工学院,安徽淮南232001

出　　处：《电源技术》2009年第6期462-465,共4页Chinese Journal of Power Sources

基　　金：安徽省国际科技合作计划资助项目(06088018);淮南市科技计划资助项目

摘　　要：采用非等温TG-DTG技术研究了用于PEMFCs的质子交换膜在空气气氛中的热分解机理及动力学,其线性升温速率分别为5.0、10.0、15.0K/min和20.0K/min。采用Kissinger、Flynn-Wall-Ozawa、Acharmethod、Coats-Redfem方法对非等温动力学数据进行了分析,得到了其热分解的反应机理函数和动力学参数。TG-DTG曲线显示其热分解过程分为二个阶段。第一阶段热分解反应过程受P2(Powerlaw)机理控制,表观活化能为126.1kJ/mol,指前因子为1.87×107s-1。第二阶段热分解反应过程受F1(化学反应)机理控制,表观活化能为205.5kJ/mol,指前因子为5.91×1011s-1。The thermal decomposition mechanism and kinetics of proton-exchange membrane were investigated by using non-isothermal TG-DTG analysis in a stream of air atmosphere at different heating rate of 5.0, 10.0, 15.0 K/min and 20.0 K/min. The non-isothermal kinetic data were analyzed by using the Kissinger method, Flynn-WalI-Ozawa method,Achar method and Coats-Redfem method. The mechanism function and kinetic parameters of the thermal decomposition were obtained. The TG-DTG curves showed that its thermal decomposition was a two-stage process.The power law （P2） mechanism controlled the thermal decomposition process in first stage. The apparent activation energy and the pre-exponential factor are 126.1 kJ/mol and 1.87×10^7s^-1 respectively. The chemical reaction mechanism （F1） controlled the thermal decomposition process in second stage. The apparent activation energy and the pre-exponential factor are 205.5 kJ/mol and 5.91×10^11s^-1 respectively.

关 键 词：质子交换膜 空气 热分解动力学 TG—DTG 

分 类 号：TM911.4[电气工程—电力电子与电力传动]