Effects of pressure on the formation of N<sub>2</sub>O over 3Mn10Fe/Ni catalyst by <i>in-situ</i> synchrotron radiation photoionization mass spectrometry

XU Ming-gao; WEN Wu; ZHU Bao-zhong; YANG Jiu-zhong; PAN Yang; SUN Yun-nan

doi:10.19906/j.cnki.JFCT.2021042

Volume 49 Issue 6

Jun. 2021

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Article Navigation > Journal of Fuel Chemistry and Technology > 2021 > 49(6): 853-860

XU Ming-gao, WEN Wu, ZHU Bao-zhong, YANG Jiu-zhong, PAN Yang, SUN Yun-nan. Effects of pressure on the formation of N2O over 3Mn10Fe/Ni catalyst by in-situ synchrotron radiation photoionization mass spectrometry[J]. Journal of Fuel Chemistry and Technology, 2021, 49(6): 853-860. doi: 10.19906/j.cnki.JFCT.2021042

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XU Ming-gao, WEN Wu, ZHU Bao-zhong, YANG Jiu-zhong, PAN Yang, SUN Yun-nan. Effects of pressure on the formation of N₂O over 3Mn10Fe/Ni catalyst by in-situ synchrotron radiation photoionization mass spectrometry[J]. Journal of Fuel Chemistry and Technology, 2021, 49(6): 853-860. doi: 10.19906/j.cnki.JFCT.2021042

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Effects of pressure on the formation of N₂O over 3Mn10Fe/Ni catalyst by in-situ synchrotron radiation photoionization mass spectrometry

doi: 10.19906/j.cnki.JFCT.2021042

XU Ming-gao^1
,,
WEN Wu²,
ZHU Bao-zhong^{1, 3},
YANG Jiu-zhong²,
PAN Yang^{2
,
,},
SUN Yun-nan^{1, 3
,
,}

1.
School of Metallurgical Engineering, Anhui University of Technology, Maanshan 243032, China
2.
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
3.
School of Petroleum Engineering, Changzhou University, Changzhou 213164, China

Funds: The project was supported by the National Natural Science Foundation of China (52076016)

Received Date: 2020-12-18
Rev Recd Date: 2021-01-20

Available Online: 2021-03-30

Publish Date: 2021-06-30

Abstract

Abstract

In order to study the formation pathway of N₂O in NH₃-mediated selective catalytic reduction (NH₃-SCR) of NO_x process and the variation of N₂O selectivity affected by pressure, in situ synchrotron radiation photoionization mass spectrometry (SR-PIMS) and flow tube reactor were used to detect the gaseous species in the NH₃-SCR reaction over 3Mn10Fe/Ni catalyst. The variations of N₂O selectivity, NO_x conversion and NH₃ conversion were analyzed under different conditions. The results show that the formation of N₂O is mainly from non-selective catalytic reaction (NSCR) and adsorbed NH₃ oxidation (NSNO). Among them, NSCR plays a dominant role in N₂O formation in the temperature range of 100−250 ℃. The contributions of the two formation pathways in the temperature range of 250−400 ℃ are equivalent, and NSNO is the main source in the temperature range of 400−500 ℃. In addition, low pressure reduces the denitration activity of the catalyst at low temperature, but promotes the formation of N₂O via NSNO reaction at high temperature.
- N₂O,
- 3Mn10Fe/Ni catalyst,
- synchrotron radiation photoionization mass spectrometry,
- low pressure,
- in situ

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References(41)

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