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《CHINESE JOURNAL OF CATALYSIS》 2000-03
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The Influence of Preparation Methods on the Thermal Stability of Alumina Modified by Strontium

LIU Yong, CHEN Xiaoyin, YANG Zhuxian, WANG Jingxian, HE Adi (Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China)  
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.
【Fund】: 福特-中国研究与发展基金资助项目!( 9712 3 0 3 )
【CateGory Index】: O642
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