Chemical Industry and Engineering Progress ›› 2023, Vol. 42 ›› Issue (8): 4264-4274.DOI: 10.16085/j.issn.1000-6613.2022-1832

• Industrial catalysis • Previous Articles     Next Articles

Efficient catalytic performance of CuO-CeO2/TiO2 for CO oxidation at low-temperature

LI Runlei1(), WANG Ziyan2, WANG Zhimiao1(), LI Fang1(), XUE Wei1, ZHAO Xinqiang1, WANG Yanji1   

  1. 1.School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China
    2.Purification Equipment Research Institute of CSIC, Handan 056027, Hebei, China
  • Received:2022-09-30 Revised:2023-02-04 Online:2023-09-19 Published:2023-08-15
  • Contact: WANG Zhimiao, LI Fang

CuO-CeO2/TiO 2 高效催化CO低温氧化反应性能

李润蕾1(), 王子彦2, 王志苗1(), 李芳1(), 薛伟1, 赵新强1, 王延吉1   

  1. 1.河北工业大学化工学院,天津 300401
    2.中国船舶重工集团公司第七一八研究所,河北 邯郸 056027
  • 通讯作者: 王志苗,李芳
  • 作者简介:李润蕾(1999—),男,硕士研究生,研究方向为绿色催化。E-mail:L530912@163.com
  • 基金资助:
    国家自然科学基金(U21A20306);河北省自然科学基金(B2022202077)

Abstract:

CuO-CeO2/TiO2 catalyst was prepared by incipient impregnation method and then used for CO oxidation at low temperature. The effects of calcination temperature, Cu-Ce loading and Ce/Cu molar ratio on the catalytic performance of CuO-CeO2/TiO2 were investigated. The catalyst was characterized by XRD, N2 isothermal adsorption-desorption, XPS and H2-TPR. When nCe/nCu was 1.6, and Cu-Ce loading was 30%, the catalyst calcined at 500℃ showed the best catalytic activity. When GHSV was 24000mL/(g·h), CO can be completely oxidized on the catalyst at 90℃. It was found that the high content of Ce3+, Cu+ and adsorbed oxygen on the surface of CuO-CeO2 /TiO2 catalyst was favorable to catalyze CO oxidation. The preparation conditions could affect the catalyst activity by regulating the content of Ce3+, Cu+ and adsorbed oxygen on the catalyst surface. Among them, calcination temperature, Cu-Ce loading and nCe/nCu would influence the contents of Cu+ and adsorbed oxygen on CuO-CeO2/TiO2 surface, while Cu-Ce loading has greatly impact on the Ce3+ content on catalyst surface.

Key words: carbon monoxide, oxidation, catalyst, preparation conditions

摘要:

利用等体积浸渍法制备了CuO-CeO2/TiO2催化剂,用于低温CO氧化反应。考察了焙烧温度、Cu-Ce负载量和Ce/Cu摩尔比等对CuO-CeO2/TiO2催化性能的影响,利用XRD、N2等温吸附-脱附、XPS、H2-TPR等方法对催化剂进行了表征。结果表明,当nCe/nCu为1.6,Cu-Ce负载量为30%时,经500℃焙烧所制得催化剂具有最佳催化活性;当空速为24000mL/(g·h),在该催化剂上90℃时CO可完全氧化。表征发现,CuO-CeO2/TiO2催化剂表面较高的Ce3+、Cu+和吸附氧含量有利于催化CO氧化反应。制备条件通过影响催化剂表面的Ce3+、Cu+和吸附氧含量,影响催化剂活性。其中,焙烧温度、Cu-Ce负载量和nCe/nCu均会影响CuO-CeO2/TiO2表面Cu+和吸附氧含量,而催化剂表面Ce3+含量仅受Cu-Ce负载量的影响较大。

关键词: 一氧化碳, 氧化, 催化剂, 制备条件

CLC Number: 

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