Citation: LIANG Yan-zheng, WANG Xue-tao, LUO Shao-feng, ZHOU Yu-feng. Performance of the modified Cu-Mn/SAPO-34 catalysts in the selective catalytic reduction of NO_x by NH₃[J]. Journal of Fuel Chemistry and Technology, ;2020, 48(6): 728-734. shu

Performance of the modified Cu-Mn/SAPO-34 catalysts in the selective catalytic reduction of NO_x by NH₃

Department of Energy and Power Engineering, Henan University of Science and Technology, Luoyang 471003, China

Corresponding author: WANG Xue-tao, wxt7682@163.com
Received Date: 12 May 2020
Revised Date: 1 June 2020

Fund Project: National Natural Science Foundation of China 50806020Henan Science and Technology Innovation Talent Program (Outstanding Youth) 114100510010The project was supported by National Natural Science Foundation of China (50806020), Henan Science and Technology Innovation Talent Program (Outstanding Youth) (114100510010) and Project Supported by National Natural Science Foundation of Henan Province (182300410256)Project Supported by National Natural Science Foundation of Henan Province 182300410256

Figures(7)

A series of Cu-Mn/SAPO-34 catalysts with different mass ratios of Cu to Mn were prepared by impregnation method. The influence of Cu and Mn loading on the denitrification performance was investigated in a fixed-bed reactor. XRD, NH₃-TPD, H₂-TPR, XPS were used to characterize and analyze the catalysts. The results show that the bimetallic modified Cu-Mn/SAPO-34 have excellent catalytic activity and broad active temperature window. Especially, the Cu-Mn/SAPO-34/1:4 catalyst with a Cu/Mn mass ratio of 1:4 has the widest active temperature window, its denitrification rates could reach 85.39% at 250℃, 96% at 300-400℃, and up to 90% at 450℃. Cu and Mn species are highly dispersed on the surface of the catalyst and do not change the crystal structure of SAPO-34. Co-doping of Cu and Mn promotes the transformation of Cu²⁺ to Cu⁺, increases the ratio of Mn⁴⁺ to Mn³⁺, improves the activity at low temperature and promotes the catalytic reaction. Cu-Mn/SAPO-34/1:4 catalyst has rich acid sites, good redox performance and resistance to SO₂ and H₂O, which can improve the activity and stability of the catalysts.
- denitration,
- Cu-Mn/SAPO-34,
- NH₃-SCR,
- NO_x,
- catalyst
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沈阳化工大学材料科学与工程学院沈阳 110142

Performance of the modified Cu-Mn/SAPO-34 catalysts in the selective catalytic reduction of NOx by NH3

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Performance of the modified Cu-Mn/SAPO-34 catalysts in the selective catalytic reduction of NO_x by NH₃