催化学报

催化学报 ›› 2006, Vol. 27 ›› Issue (11): 937-939.

• 研究快讯 •    下一篇

CoOx/CeO2催化剂上的CO低温氧化反应

邵建军1,2,张平1,唐幸福2,张保才2,刘俊龙2,徐奕德2,申文杰2   

  1. 1 装甲兵工程学院装备再制造国防科技重点实验室, 北京 100072; 2 中国科学院大连化学物理研究所催化基础国家重点实验室, 辽宁大连 116023
  • 收稿日期:2006-11-25 出版日期:2006-11-25 发布日期:2006-11-25

A CoOx/CeO2 Catalyst for Low-Temperature CO Oxidation

SHAO Jianjun1,2, ZHANG Ping1, TANG Xingfu2, ZHANG Baocai2, LIU Junlong2, XU Yide2, SHEN Wenjie2   

  1. 1 National Key Laboratory for Remanufacturing, Academy of Armored Force Engineering, Beijing 100072, China; 2 State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, Liaoning, China
  • Received:2006-11-25 Online:2006-11-25 Published:2006-11-25

PDF

755

被引次数

26

摘要： 采用沉淀氧化法制备了CoOx/CeO2催化剂, 并分别在干燥和含有水汽的原料气中进行了CO的氧化反应. 结果发现, CoOx/CeO2复合氧化物催化剂具有良好的CO低温氧化活性和抗水性. 在干燥的原料气中和196 K的条件下,该催化剂催化氧化CO的转化率可连续400 min以上保持在99%; 当温度升高到298 K反应 2400 min后, CO的转化率可达到94%. 而当反应气中含有3.1%的水汽时, 在383 K下反应2400 min后, CO的转化率仍可保持在79%.

关键词: 氧化钴, 氧化铈, 一氧化碳, 氧化, 低温

Abstract: A CoOx/CeO2 catalyst was prepared by the co-precipitation-oxidation method, and its catalytic performance for CO oxidation was investigated under humid and dry conditions ,respectively. The CoOx/CeO2 catalyst exhibited excellent activity and good resistance to water vapor poisoning. Remarkably, 99% CO conversion could be achieved at 196 K for more than 400 min under dry condition, and when the reaction was carried out at 298 K, the conversion of CO was maintained at 94% after 2400 min. Even when 3.1% of water was added, the conversion of CO was still kept at 79% after 2400 min on-stream at 383 K.

Key words: cobalt oxide, ceria, carbon monoxide, oxidation, low temperature