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

LIANG Yan-zheng; WANG Xue-tao; LUO Shao-feng; ZHOU Yu-feng

Volume 48 Issue 6

Jun. 2020

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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 NOx by NH3[J]. Journal of Fuel Chemistry and Technology, 2020, 48(6): 728-734.

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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.

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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

Funds:

National Natural Science Foundation of China 50806020

Henan Science and Technology Innovation Talent Program (Outstanding Youth) 114100510010

Project Supported by National Natural Science Foundation of Henan Province 182300410256

More Information

Corresponding author: WANG Xue-tao, E-mail: wxt7682@163.com
Received Date: 2020-05-12
Rev Recd Date: 2020-06-01

Available Online: 2021-01-23

Publish Date: 2020-06-10

Abstract

Abstract

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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References(36)

References

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