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

LI Wei; ZHANG Cheng; LI Xin; TAN Peng; FANG Qing-yan; CHEN Gang

Volume 45 Issue 12

Dec. 2017

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Article Navigation > Journal of Fuel Chemistry and Technology > 2017 > 45(12): 1508-1513

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.

Citation:

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

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Influence of Ho doping on the deNO_x 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

Funds:

the National Natural Science Foundation of China 51676076

National International Science and Technology Cooperation Project 2015DFA60410

More Information

Corresponding author: ZHANG Cheng, Tel:027-87542417-8321, Fax:027-87545526, E-mail:chengzhang@mail.hust.edu.cn
Received Date: 2017-07-11
Rev Recd Date: 2017-09-25

Available Online: 2021-01-23

Publish Date: 2017-12-10

Abstract

Abstract

A series low temperature SCR catalysts Mn_0.4Ce_0.07Ho_x/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 Mn_0.4Ce_0.07Ho_0.1/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.
- selective catalytic reduction,
- holmium,
- catalyst,
- Mn-Ce/TiO₂

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References(23)

References

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