铝锂/镁合金与H_2O反应的热力学分析  

Thermodynamic analysis on the reactions of high aluminum-magnesium /lithium alloy with H_2O

作　　者：李杨[1] 杨卫娟[1] 周俊虎[1] 张天佑[1] 陈超[1] 岑可法[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027

出　　处：《能源工程》2014年第2期7-11,共5页Energy Engineering

基　　金：中央高校基本科研业务费专项资金资助项目(2012FZA4014);浙江省自然科学基金资助项目(LY12E06006)

摘　　要：根据吉布斯能最小原理,利用FactSage计算研究了Al-Li-H2O体系和Al-Mg-H2O反应体系的热力参数,研究了温度、合金组成和H2O量的影响.结果表明：Al-Li-H2O体系氧化反应可以自发进行,随着温度的升高反应放出的热量减少;合金组成中Al含量越高,生成的H2越少;随着Li含量增大,固态产物由Al2O3向LiA-lO2、Li2O转变.Al-Mg-H2O体系氧化反应可以自发进行,随着温度的升高反应放出的热量减少;合金组成中Al含量越高生成的H2越多;随着Mg含量增大,最终固态产物由Al2O3向MgAl2O4、MgO转变.Al中添加Li或Mg因产物发生转变而对制氢反应有促进作用;H2O量增加有助于反应最终温度的降低,温差为1800 ～2000 K,对金属制氢的实施应用有指导意义.The thermodynamic parameters of Al-Li-H2O and Al-Mg-H2O reaction systems were investigated by using the FactSage software based on the Gibbs energy minimization principle. The effect of temperature, alloy composition and H2O tool amount were studied. Results showed that the oxidation reaction of the Al-Li-H2O system could occur sponta- neously and the heat release of the reaction per mol alloy decreased as the temperature increased. Higher Al content in the alloy induced less H2 production. The solid product changed from Al2O3 to LiAlO2 and Li20 as Li content grew. The exothermic reaction of the Al-Mg-H2O system could occur spontaneously. As the temperature increased, the heat release of the reaction decreased. Higher Al content in the alloy induced more H2 production; The solid product changed from Al203 to MgAl204 and MgO as magsium content grew. Adding Li or Mg had a promotion effect on the reaction with water;More H2O amount helped decreasing the ultimate temperature, which was a guidance to practical use.

关 键 词：铝 制氢 合金 热力学 

分 类 号：TK16[动力工程及工程热物理—热能工程]