Performance of Fe-Cu/ZSM-5 catalyst in the DeNOx process via NH3-SCR

HU Hai-peng; WANG Xue-tao; ZHANG Xing-yu; SU Xiao-xin; YANG Xiao-dong; SHI Rui-hua

Volume 46 Issue 2

Feb. 2018

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Article Navigation > Journal of Fuel Chemistry and Technology > 2018 > 46(2): 225-232

HU Hai-peng, WANG Xue-tao, ZHANG Xing-yu, SU Xiao-xin, YANG Xiao-dong, SHI Rui-hua. Performance of Fe-Cu/ZSM-5 catalyst in the DeNOx process via NH3-SCR[J]. Journal of Fuel Chemistry and Technology, 2018, 46(2): 225-232.

Citation:

HU Hai-peng, WANG Xue-tao, ZHANG Xing-yu, SU Xiao-xin, YANG Xiao-dong, SHI Rui-hua. Performance of Fe-Cu/ZSM-5 catalyst in the DeNO_x process via NH₃-SCR[J]. Journal of Fuel Chemistry and Technology, 2018, 46(2): 225-232.

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Performance of Fe-Cu/ZSM-5 catalyst in the DeNO_x process via NH₃-SCR

1.
Henan University of Science and Technology, Luoyang 471003, China
2.
Shandong University, National Engineering Lab of Coal-fired Pollution Emission Reduction, Jinan 250061, China

Funds:

the National Natural Science Foundation of China 50806020

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

Science and Technology Project of Science and Technology Department of Henan Province 152102210280

More Information

Corresponding author: WANG Xue-tao, E-mail:wxt7682@163.com
Received Date: 2017-11-19
Rev Recd Date: 2018-01-03

Available Online: 2021-01-23

Publish Date: 2018-02-10

Abstract

Abstract

A series of Fe-Cu/ZSM-5 catalysts with different Fe/Cu molar ratios were prepared by impregnation method and characterized by XRD, H₂-TPR, NH₃-TPD and in situ DRIFTS; their performance in the denitrification (de-NO_x) process via NH₃-SCR was investigated.The results showed that the bimetallic modified Fe-Cu/ZSM-5 catalysts have a broad active temperature window.Especially, the Fe-Cu/ZSM-5 1:4 catalyst with a Fe/Cu molar ratio of 1:4 displays the highest activity; over it, the deNO_x efficiency reaches the maximum of 99.46% at 335℃ and keeps above 90% at 250-450℃.Copper and iron species, present as amorphous oxides, are finely dispersed on the catalyst surface and the bimetallic modified catalysts retain the crystal structure of ZSM-5.The Fe-Cu/ZSM-5 1:4 catalyst exhibits abundant acid sites and excellent redox performance.E-R mechanism and L-H mechanism may coexist during the NH₃-SCR reaction under certain temperature; moreover, the onset temperature of E-R mechanism is much lower than that of L-H mechanism and the denitration reaction may be ignited at 200℃.
- Fe-Cu/ZSM-5,
- NH₃-SCR,
- DeNO_x,
- reaction mechanism,
- in situ DRIFTS

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References(36)

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