详细信息

氧化铈在非贵金属氧化物催化剂中的作用(Ⅴ)──热环境对Cu-Mn-Ce-O催化剂性能的影响    

Role of Ceria in Non-precious Metal Oxide Catalysts(Ⅴ)──The Effect of Environmental Temperature on the Properties of Cu-Mn-Ce-O catalyst

文献类型:期刊文献

中文题名:氧化铈在非贵金属氧化物催化剂中的作用(Ⅴ)──热环境对Cu-Mn-Ce-O催化剂性能的影响

英文题名:Role of Ceria in Non-precious Metal Oxide Catalysts(Ⅴ)──The Effect of Environmental Temperature on the Properties of Cu-Mn-Ce-O catalyst

作者:卢冠忠[1];王幸宜[1];汪仁[1];吴善良[1]

机构:[1]华东理工大学工业催化研究所

年份:1994

卷号:15

期号:6

起止页码:895

中文期刊名:高等学校化学学报

外文期刊名:Chemical Journal of Chinese Universities

收录:北大核心:【北大核心1992】;CSCD:【CSCD2011_2012】;

语种:中文

中文关键词:氧化铈;氧化铜;催化剂;热稳定性

外文关键词:Cerium oxide;Copper oxide;Manganese oxide;Catalyst;Thermostability

摘要:研究了热环境对Cu-Mn-Ce-O催化剂表面积、结构、氧性能及对甲苯催化氧化活性的影响。发现CeO_2作为助催化剂,对延缓氧化铝载体的表面收缩几乎没有作用,但能阻止催化剂中CuMn_2O_4尖晶石的生成,防止无定型活性相在高温环境中的烧结,提高催化剂水热稳定性能,尤其在温度高于800℃时,效果尤佳,合适的Ce/Cu原子比为0.38~0.44。
In this paper,the effects of an environmental temperature on the surface area,solid structures,oxygen properties and catalytic actlvities of Cu-Mn-Ce-O supported on alumina have been studied.The results indicate that as a promoter,CeO_2 can not inhibit the reduction of surface area of the supporter at high temperature,but can inhibit the crystal growth of CuMn_2O_1 spinel in the catalyst and avoid the sinter of the amorphus active solidcompounds in catalysts,and increase the thermostability of the catalysts.In particular,over temperature 800℃ the promoting effect of CeO_2 in the catalyst is more obvious,in which the atom ratio of Ce/Cu is 0.38-0.44.

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