低碳混合醇铜基催化剂中稀土助剂的作用  

The effect of rare earth promoter in Cu-base catalysts for lower alcohols

作　　者：康慧敏[1] 陈宝树[1] 赵九生[1] 

机构地区：[1]天津大学化学工程系

出　　处：《天然气化工—C1化学与化工》1991年第4期12-16,共5页Natural Gas Chemical Industry

摘　　要：研究了La、Ce稀土助剂对低碳混合醇铜基催化剂结构和性能的影响。含有La或Ce的催化剂各组分分散均匀,铜晶不易烧结长大,加之表面存在传热性好的网络结构,热稳定性增强。同时稀土助剂的加入抑制了K(钾)的副作用,并使K在表面上富集,提高了高碳醇的选择性。The effect of rare earth promoter on the struc- ture and properties of Cu-base catalysts for lower alcohols synthesis has been studied. It has been found that the rare earth promoter (La_2O_3 or Ce_2O_2)can enhance dispersion of Cu crystallite and a network structure is formed, The catalysts possess a larger Cu surface area and better thermal stability. In the presence of rare earth promoter, K is localized on the surface of the catalysts and therefore the selectivivty of higher alcohols is raised. The role of La and Ce has also been explained in the article.

关 键 词：稀土 助剂 铜基催化剂 低碳混合醇 

分 类 号：O643.361[理学—物理化学]