ST909合金水分解反应动力学研究  

Study on the kinetics of water decomposition reaction on St909 alloy

作　　者：姚勇[1] 黄志勇[1] 宋江锋[1] 熊仁金[1] 

机构地区：[1]中国工程物理研究院材料研究所,四川绵阳621907

出　　处：《化学工程师》2015年第1期19-22,共4页Chemical Engineer

基　　金：国家核能开发专项基金资助项目(HNKF-02)

摘　　要：采用恒温热重法考察了ST909合金粉末在温度723~823K和水蒸汽浓度2500×106~10000×106的水分解反应动力学性质,结果表明合金与水反应的有效成分为Zr和Mn,对应产物为ZrO2和MnO,水分解反应速率随温度升高和水蒸汽浓度升高而增大。采用气固非催化反应模型对反应过程进行了参数拟合,结果表明该反应可用Ginstring-Brounshtein模型加以描述,反应级数为1级,反应表观活化能为118k J·mol-1。The kinetics of water decomposition reaction on ST909 alloy powder was investigated by isothermal TG method with the temperature range 723-823K and the water vapor concentration range 2500×10^6-10000 ×10^6, the result showed that the effective elements in ST909 are Zr and Mn with the corresponding products ZrO2 and MnO. The reaction rate increased with the increasement of temperature and water concentration. The reaction process simulation with non-catalytic gas-solid reaction models showed that Ginstring-Brounshtein model can accurately describe the reaction process, and the reaction is one order with the activation energy 118kJ·mol^-1.

关 键 词：ST909 水分解 恒温热重 Ginstring-Brounshtein模型 

分 类 号：TQ031[化学工程]