制备方法对锶改性氧化铝的高温热稳定性的影响  

The Influence of Preparation Methods on the Thermal Stability of Alumina Modified by Strontium

作　　者：刘勇[1] 陈晓银[1] 杨竹仙[1] 王敬先[1] 何阿弟[1] 

机构地区：[1]复旦大学环境科学与工程系,上海200433

出　　处：《催化学报》2000年第3期273-275,共3页

基　　金：福特-中国研究与发展基金资助项目!( 9712 3 0 3 )

摘　　要：The thermal stabilization mechanism of strontium and effect of preparation method on the thermal stability of Sr modified alumina and the stabilization effect of strontium species have been investigated by measuring the BET specific surface area and powder X ray diffraction. The results show that strontium species can stabilize the alumina at high temperature and the stabilization effect of the strontium species increases with the rise of strontium content, however, the overabundance of strontium species weakens its stabilization effect. The preparation method influences the thermal stability of alumina and stabilization effect of strontium. The thermal stability of Sr modified alumina prepared by sol gel method is superior to that of samples prepared by gelation and impregnation. At high temperature, it is probable that the dispersed strontium species instead of hexaaluminate stabilizes the alumina.The thermal stabilization mechanism of strontium and effect of preparation method on the thermal stability of Sr modified alumina and the stabilization effect of strontium species have been investigated by measuring the BET specific surface area and powder X ray diffraction. The results show that strontium species can stabilize the alumina at high temperature and the stabilization effect of the strontium species increases with the rise of strontium content, however, the overabundance of strontium species weakens its stabilization effect. The preparation method influences the thermal stability of alumina and stabilization effect of strontium. The thermal stability of Sr modified alumina prepared by sol gel method is superior to that of samples prepared by gelation and impregnation. At high temperature, it is probable that the dispersed strontium species instead of hexaaluminate stabilizes the alumina.

关 键 词：氧化铝 热稳定性 氧化锶 制备方法 催化剂载体 

分 类 号：O642[理学—物理化学]