Investigation of Co-doped Mn oxide catalyst for NH3-SCR activity and SO2/H2O resistance

LI Hai-xia; JIN Le-ying; ZHANG An-chao; SUN Zhi-jun; ZHANG Xin-min; ZHU Qi-feng; YANG Chang-ze; ZHANG Shuai-bo

doi:10.1016/S1872-5813(22)60044-6

Volume 50 Issue 11

Nov. 2022

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Article Navigation > Journal of Fuel Chemistry and Technology > 2022 > 50(11): 1404-1416

LI Hai-xia, JIN Le-ying, ZHANG An-chao, SUN Zhi-jun, ZHANG Xin-min, ZHU Qi-feng, YANG Chang-ze, ZHANG Shuai-bo. Investigation of Co-doped Mn oxide catalyst for NH3-SCR activity and SO2/H2O resistance[J]. Journal of Fuel Chemistry and Technology, 2022, 50(11): 1404-1416. doi: 10.1016/S1872-5813(22)60044-6

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LI Hai-xia, JIN Le-ying, ZHANG An-chao, SUN Zhi-jun, ZHANG Xin-min, ZHU Qi-feng, YANG Chang-ze, ZHANG Shuai-bo. Investigation of Co-doped Mn oxide catalyst for NH₃-SCR activity and SO₂/H₂O resistance[J]. Journal of Fuel Chemistry and Technology, 2022, 50(11): 1404-1416. doi: 10.1016/S1872-5813(22)60044-6

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Investigation of Co-doped Mn oxide catalyst for NH₃-SCR activity and SO₂/H₂O resistance

doi: 10.1016/S1872-5813(22)60044-6

1.
School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454003, China

Funds: The project was supported by the Key Research Project of Higher Education Institutions in Henan Province (23A470002) and the Innovative Research Team of Henan Polytechnic University (T2020-3).

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Corresponding author: Tel: 0391-3987546, 0391-3987511, E-mail: lihx@hpu.edu.cn; zhangxm@hpu.edu.cn
Received Date: 2022-03-16
Rev Recd Date: 2022-04-25

Available Online: 2022-08-06

Publish Date: 2022-11-30

Abstract

Abstract

A series of Co-doped Mn oxide catalysts with different Co/Mn molar ratios were prepared by co-precipitation method, which was systematically characterized by XRD, SEM, H₂-TPR and NH₃-TPD etc. Co-doped Mn oxide catalysts are evaluated for NH₃-SCR activity and resistance to SO₂ and/or H₂O, and the Co(1)-MnO_x catalyst with Mn/Co molar ratio of 1∶1 performs the best catalytic performance, which achieved higher than 90% NO_x conversion in the temperature range of 100−275 °C and possessed better SO₂ and H₂O resistance. The Co(1)-MnO_x catalyst presented a sphere-like structure possessing a relatively large surface area. Doping of cobalt greatly improved the high-valent metal ions and chemisorbed oxygen content of Co(1)-MnO_x catalyst surface, and the catalyst possessed abundant active species and acid sites and apparent activation energy of the catalyst was reduced, which makes Co(1)-MnO_x a highly effective NH₃-SCR catalyst.
- selective catalytic reduction,
- cobalt-doping,
- manganese,
- synergistic effect

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References(55)

References

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