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Citation: LI Wei, ZHANG Cheng, LI Xin, TAN Peng, FANG Qing-yan, CHEN Gang. Influence of Ho doping on the deNOx performance of Mn-Ce/TiO2 low temperature SCR catalyst[J]. Journal of Fuel Chemistry and Technology, ;2017, 45(12): 1508-1513. shu

Influence of Ho doping on the deNOx performance of Mn-Ce/TiO2 low temperature SCR catalyst

  • State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

  • Corresponding author: ZHANG Cheng, chengzhang@mail.hust.edu.cn
  • Received Date: 11 July 2017
    Revised Date: 25 September 2017

    Fund Project: The project was supported by the National Natural Science Foundation of China (51676076) and National International Science and Technology Cooperation Project (2015DFA60410)National International Science and Technology Cooperation Project 2015DFA60410the National Natural Science Foundation of China 51676076

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  • A series low temperature SCR catalysts Mn0.4Ce0.07Hox/TiO2 catalysts with different Ho doping ratios were prepared by impregnation method. The effects of Ho doping on the denitrification of Mn-Ce/TiO2 low temperature SCR catalyst were studied. The catalysts were characterized by using X-ray photoelectron spectroscopy (XPS), X-ray fluorescence probe (XRF), Brunauer-Emmett-Teller (BET) surface measurement, X-ray diffraction (XRD) and NH3-temperature programmed desorption (NH3-TPD). The results showed that the doping of Ho can improve the low temperature denitrification performance of Mn-Ce/TiO2 catalyst. The catalytic efficiency of Mn0.4Ce0.07Ho0.1/TiO2 with the ratio of Ho:Ti=0.1 reached 91.17% at 200℃, which is the highest during the process. The catalytic efficiency could reach more than 80% at 140-240℃. The characterization results showed that Ho doping can increase the surface area of the catalyst, increase the concentration of chemisorbed oxygen in the catalyst and increase the deposition amount of Ce on the catalyst surface.
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