催化学报

催化学报 ›› 2007, Vol. 28 ›› Issue (11): 953-957.

• 研究论文 • 上一篇    下一篇

介孔CeO2负载的Co3O4催化剂催化富氢气体中的CO优先氧化反应

郭强1,吴美玲1,刘源1,白雪2   

  1. 1 天津大学化工学院催化科学与工程系, 天津 300072; 2 内蒙古工业大学化工学院, 内蒙古呼和浩特 010062
  • 收稿日期:2007-11-25 出版日期:2007-11-25 发布日期:2011-10-13

Mesoporous CeO2-Supported Co3O4 Catalysts for CO Preferential Oxidation in H2-Rich Gases

GUO Qiang1, WU Meiling1, LIU Yuan1*, BAI Xue2   

  1. 1 Department of Catalysis Science and Technology, School of Chemical Engineering, Tianjin University, Tianjin 300072, China; 2 College of Chemical Engineering, Inner Mongolia University of Technology, Huhehot 010062, Inner Mongolia, China
  • Received:2007-11-25 Online:2007-11-25 Published:2011-10-13

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923

被引次数

36

摘要： 采用溶胶-凝胶法制备出介孔氧化铈(meso-CeO2)及其负载的氧化钴(Co3O4/meso-CeO2)催化剂,并将其应用于富氢气体中CO的优先氧化反应. 通过N2物理吸附及X射线衍射表征考察了meso-CeO2和Co3O4/meso-CeO2的结构性质. 活性评价结果表明,在高空速下, Co3O4/meso-CeO2催化剂上的CO优先氧化性能很好,但水和CO2对CO的氧化有一定的负作用. Co3O4/meso-CeO2催化剂的CO完全氧化温度窗口远大于沉淀法制备CeO2负载的氧化钴催化剂.

关键词: 介孔, 二氧化铈, 四氧化三钴, 一氧化碳, 优先氧化, 氢气

Abstract: Mesoporous ceria (meso-CeO2) and the mesoporous ceria-supported cobalt catalyst (Co3O4/meso-CeO2) were synthesized through a surfactant-templated method and used for CO preferential oxidation (PROX) in H2-rich gases. The N2 physical adsorption andX-raydiffraction techniques were used to study the textural properties and crystalline structure of the meso-CeO2 and Co3O4/meso-CeO2. It was found that Co3O4/meso-CeO2 exhibited very good catalytic performance for the PROX reaction at high space velocity, whereas CO2 and water had negative effects on CO conversion. In addition, the Co3O4/meso-CeO2 catalyst had a much wider temperature window for the complete conversion of CO than the Co3O4/non-mesoporous CeO2 catalyst.

Key words: mesopore, ceria, cobalt oxide, carbon monoxide, preferential oxidation, hydrogen