SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2021, Vol. 38 ›› Issue (10): 155-164.DOI: 10.1016/j.cjche.2020.08.029

• Catalysis, Kinetics and Reaction Engineering • 上一篇    下一篇

High efficient removal of HCN over porous CuO/CeO2 micro-nano spheres at lower temperature range

Zhihao Yi, Jie Sun, Jigang Li, Tian Zhou, Shouping Wei, Hongjia Xie, Yulin Yang   

  1. Department of Chemistry Defense, Institute of NBC Defense, Beijing 102205, China
  • 收稿日期:2020-05-08 修回日期:2020-08-11 出版日期:2021-10-28 发布日期:2021-12-02
  • 通讯作者: Jie Sun
  • 基金资助:
    This work is supported by the Chinese Civil Air Defense Office ([2014] No. 251-61) and the Military Scientific Research Program (Zhuangzong [2018] No. 635).

High efficient removal of HCN over porous CuO/CeO2 micro-nano spheres at lower temperature range

Zhihao Yi, Jie Sun, Jigang Li, Tian Zhou, Shouping Wei, Hongjia Xie, Yulin Yang   

  1. Department of Chemistry Defense, Institute of NBC Defense, Beijing 102205, China
  • Received:2020-05-08 Revised:2020-08-11 Online:2021-10-28 Published:2021-12-02
  • Contact: Jie Sun
  • Supported by:
    This work is supported by the Chinese Civil Air Defense Office ([2014] No. 251-61) and the Military Scientific Research Program (Zhuangzong [2018] No. 635).

摘要: The porous CeO2 flowerlike micro-nano spheres based materials were prepared to remove HCN effectively at lower temperature range. The CeO2 and a serious of porous flowerlike ceria based materials loaded with metal species including Cu, Ag, Ni, Co and Fe were synthesized by hydrothermal method and precipitation method respectively. The physicochemical properties were probed by means of XRD, H2-TPR, BET, SEM and XPS. The removal ability for 130?mg·m-3 HCN over CuO/CeO2 showed the highest activity, the breakthrough time of which was more than 70?min at the condition of 30?℃, 120,000?h-1 and 5?% (volume) H2O, owe to a higher relative atomic ratio of oxygen vacancies and Oβ, the stronger interaction between metal particle and support, the optimum redox properties. The reaction mechanism was speculated by detecting the reaction products selectivity at different reaction temperature. It was shown that the reaction system for removal of HCN over CuO/CeO2 catalytic material involved chemisorption, catalytic hydrolysis, catalytic oxidation as well as NH3-SCR reactions.

关键词: Breakthrough time, Chemisorption, Catalytic hydrolysis, Catalytic oxidation, NH3-SCR

Abstract: The porous CeO2 flowerlike micro-nano spheres based materials were prepared to remove HCN effectively at lower temperature range. The CeO2 and a serious of porous flowerlike ceria based materials loaded with metal species including Cu, Ag, Ni, Co and Fe were synthesized by hydrothermal method and precipitation method respectively. The physicochemical properties were probed by means of XRD, H2-TPR, BET, SEM and XPS. The removal ability for 130?mg·m-3 HCN over CuO/CeO2 showed the highest activity, the breakthrough time of which was more than 70?min at the condition of 30?℃, 120,000?h-1 and 5?% (volume) H2O, owe to a higher relative atomic ratio of oxygen vacancies and Oβ, the stronger interaction between metal particle and support, the optimum redox properties. The reaction mechanism was speculated by detecting the reaction products selectivity at different reaction temperature. It was shown that the reaction system for removal of HCN over CuO/CeO2 catalytic material involved chemisorption, catalytic hydrolysis, catalytic oxidation as well as NH3-SCR reactions.

Key words: Breakthrough time, Chemisorption, Catalytic hydrolysis, Catalytic oxidation, NH3-SCR