Ce改性Fe_2O_3催化剂对CO催化氧化的影响  

Effect of Ce addition on Fe_2O_3 catalyst towards CO catalytic oxidation

作　　者：陈然[1] 高晓亚[1] 王晶[1] 陈柯臻 钟丽萍[1] 雷艳秋 梅占强 罗永明[1] CHEN Ran;GAO Xiaoya;WANG Jing;CHEN Kezhen;ZHONG Liping;LEI Yanqiu;MEI Zhanqiang;LUO Yongming(Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500,Yunnan,China)

机构地区：[1]昆明理工大学环境科学与工程学院,云南昆明650500

出　　处：《化工进展》2017年第10期3737-3742,共6页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金项目(U1402233;21267011;21367015)

摘　　要：采用共沉淀法制备铁铈氧化物催化剂,考察Ce添加对Fe_2O_3催化氧化CO性能的影响。活性测试表明,负载Ce后,催化剂活性显著提升,CO的转化率在常温常压下能够达到90%以上,主要得益于添加Ce后的催化剂有着较大的比表面积,更好的氧化还原性能以及在催化剂中形成铁铈固溶体。此外,不同的铁前体对催化剂的活性有较大影响。实验结果表明,以Fe Cl3作为前体制备出的Ce O2/Fe(c)具有最大的比表面积和较好的氧化还原性能,从而显示出最佳的CO氧化活性。A series of iron-ceria oxide catalysts were prepared by co-precipitation method and the effects of Ce adding into Fe2O3on CO catalytic oxidation activity were investigated.Activity result shows that the addition of Ce increases the CO catalytic activity significantly,which can attain more than90%CO conversion at ambient temperature and atomospheric pressure.Higher surface area and better redox ability than those of pure Fe2O3,and the formation of iron-ceria solid solution in the catalyst may be responsible for the increased catalytic activity.Additionally,different iron precursor has great influence on the CO catalytic oxidation.Sample that was prepared by using FeCl3as iron precursor shows the best catalytic performance.

关 键 词：催化 还原 氧化 一氧化碳 

分 类 号：X511[环境科学与工程—环境工程]