氧化铈负载CuO催化材料对甲烷燃烧的催化作用  

Effect of CuO/CeO_2 Catalyst on Methane Combustion

作　　者：崔梅生[1] 杨东[2] 何柱生[3] 宋永吉[4] 黄小卫[1] 陈霭璠[2] 

机构地区：[1]北京有色金属研究总院有研稀土新材料股份有限公司,北京100088 [2]北京化工大学理学院,北京100029 [3]宝鸡文理学院化学化工系,陕西宝鸡721007 [4]北京石油化工学院,北京102600

出　　处：《中国稀土学报》2004年第5期605-608,共4页Journal of the Chinese Society of Rare Earths

基　　金：国家十五"863"(2001AA324050)资助项目;国家自然科学基金(20276006)资助项目;北京市自然科学基金(8032007)资助项目

摘　　要：以甲烷催化燃烧为目标反应,考察了CuO/CeO2催化材料的催化活性,研究了催化材料中铜含量,制备方法及焙烧温度对催化活性的影响。结果表明,CuO/CeO2催化材料对甲烷燃烧反应呈现出较高催化活性,适当温度下焙烧催化剂有利于提高催化剂的催化活性。随着催化剂中氧化铜含量的改变,甲烷完全燃烧的温度改变较大。对于浸渍法样品,当CuO%(质量分数)>13.0%时,复合物本体有CuO晶相出现,而不是以高分散形式分布在复合物表面,导致催化活性下降,完全燃烧温度升高。最佳CuO含量CuO%约为8.0%。Methane catalytic combustion on CuO/CeO_2 catalyst was studied. The effects of copper content in the catalyst and calcination temperature of the catalyst on the catalytic activity were investigated. The results show that the catalyst exhibits high activity in methane combustion and the catalyst prepared by impregnation method is more active than the one prepared by co-precipitation of Cu(NO_3)_2 and Ce(NO_3)_3. For impregnation method samples, when copper content CuO% is smaller than 13% (mass fraction), the ignition temperature and total conversion temperature of the reaction are lowered with the increase of copper content in the catalyst. However, when the Cu content is over 13%, the excess copper has a bad effect on the catalytic activity because of the formation of bulk CuO crystales. The proper calcination temperature for the active catalyst is about 650°, and the optimal copper content is about 8.0%.

关 键 词：催化 氧化铈 氧化铜 甲烷 催化燃烧 稀土 

分 类 号：O643.3[理学—物理化学] TQ426[理学—化学]