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.
出处
《高等学校化学学报》
CSCD
北大核心
1994年第6期895-898,共4页
Chemical Journal of Chinese Universities
关键词
氧化铈
氧化铜
催化剂
热稳定性
Cerium oxide
Copper oxide
Manganese oxide
Catalyst
Thermostability
