Effect of sulfuric acid modification of Al2O3 support on the SCR performance of MnCe/Al2O3 catalysts

ZHANG Qiang; LIU Lu; YU Meng-yun; ZHOU Zhou

Volume 47 Issue 9

Sep. 2019

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Article Navigation > Journal of Fuel Chemistry and Technology > 2019 > 47(9): 1137-1145

ZHANG Qiang, LIU Lu, YU Meng-yun, ZHOU Zhou. Effect of sulfuric acid modification of Al2O3 support on the SCR performance of MnCe/Al2O3 catalysts[J]. Journal of Fuel Chemistry and Technology, 2019, 47(9): 1137-1145.

Citation:

ZHANG Qiang, LIU Lu, YU Meng-yun, ZHOU Zhou. Effect of sulfuric acid modification of Al₂O₃ support on the SCR performance of MnCe/Al₂O₃ catalysts[J]. Journal of Fuel Chemistry and Technology, 2019, 47(9): 1137-1145.

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Effect of sulfuric acid modification of Al₂O₃ support on the SCR performance of MnCe/Al₂O₃ catalysts

1.
State Key Laboratory of Heavy Oil Processing in China University of Petroleum(East China), Qingdao 266580, China
2.
Heilongjiang New Harmony Union Biotechnology Co. Ltd, Suihua 152000, China

Funds:

the National Natural Science Foundation of China 21406270

More Information

Corresponding author: ZHANG Qiang, E-mail: xyz@upc.edu.cn
Received Date: 2019-04-04
Rev Recd Date: 2019-07-15

Available Online: 2021-01-23

Publish Date: 2019-09-10

Abstract

Abstract

With unmodified and modified Al₂O₃ as the support, a series of Mn-Ce catalysts were prepared by impregnation method and characterized by XRD, BET, NH₃-TPD, H₂-TPR and FT-IR. The catalytic performance in the NH₃-SCR of NO_x was investigated. The results show that the sulfuric acid modification to the support decreased the metal dispersion and weakened the oxidization property of the catalyst, increased the concentration of acid sites, especially, B acid sites. Besides, the optimum temperature window ranges for SCR of the modified catalyst moved to higher temperature and broadened, and increased with the increase of modified liquid concentration. The unmodified catalyst and the catalyst modified by 0.2 mol/L solution had same SCR reactivity within the temperature range of 200-250 ℃. However, the modified catalyst showed the best resistance to SO₂ and H₂O and presented 70% NO conversion at 250 ℃.
- NH₃-SCR,
- Mn-CeO_x,
- Al₂O₃,
- sulfuric acid-modified

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References(31)

References

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