【作者】 郁青春； 张世超； 王新东；

【Author】 Yu Qingchun , Zhang Shichao, Wang Xindong (School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China; School of Material Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China)

【机构】 北京科技大学冶金与生态学院； 北京航空航天大学材料学院；

【摘要】 CeO2在Y-Al2O3载体表面分散阀值的确定对于提高CeO2的利用率具有重要的现实意义。用浸渍法制备了CeO2/γ-Al2O3催化剂, XRD分析表明随着负载量的增加,CeO2的衍射峰强度也随之增加。选取衍射峰不与CeO2衍射峰重叠且具有良好的稳定性的NiO作为参比物质,用基体清洗法计算CeO2的单层分散阀值为0．125 g／g(γ-Al2O3),浸渍时间影响单层分散阀值的大小。更多还原

【Abstract】 It is significant to determine the threshold of CeO2 supported on γ-Al2O3 to increase its conversion. In this paper, CeO2/γ-Al2O3 was prepared by impregnation. XRD testing show that the intensity of X-rays diffraction pattern of CeO2 is improved with increasing CeO2 loading amount. NiO is used as reference material for its stability and its separate strongest line from that of CeO2. The threshold of CeO2 supported on γ-Al2O3 is 0.125 g/g(γ-Al2O3) calculated with matrix-flushing, meanwhile, it is found that the threshold can be changed by the variation of impregnating time.更多还原