摘要
采用浸渍法制备了一系列CuO/Ce_(0.9)Zr_(0.1)O_2催化剂,并利用XRD,XPS对催化剂结构进行了表征,考察了铜担载量,焙烧温度,空速以及CO_2和H_2O的存在对选择氧化消除CO反应的影响.结果表明,在600℃焙烧后的催化剂具有最佳的催化活性和选择性,而且在CO_2和H_2O的存在下140℃也能达到有效消除CO(100ppm以下)的目的,同时选择性达到了70%.100h的连续测试显示催化剂具有良好的稳定性.
A series of CuO/Ce0.9 Zr0.1 O2 catalysts for CO oxidation were prepared by precipitation method. X-ray diffraction pattern, XPS analyses were used for characterization of the catalysts. The effects of catalysts calcination temperature, CuO contents, GHSV, presence of CO2 and H2O on the selective oxidation of CO over the catalysts were investigated, and exhibited very high catalytic performance over the 7% CuO Ce0.9Zr0.1O2catalyst when calcinations temperature at 600 ℃, with 99.5% conversion of CO and 70% selectivity at 140 ℃. And also, very good catalytic stability was obtained for 100 h continuous evaluation.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2007年第6期510-514,共5页
Journal of Molecular Catalysis(China)
关键词
固溶体
分散
选择氧化
模拟真实气体
solid solution
disperse
selective oxidation
simulative gas
