The different effect of SO2 on Zn-poisoned commercial V2O5-WO3/TiO2 catalysts with varied Zn loading

Yanke Yu; Mengqiao Geng; Jiahang Li; Jingjing Wang; Desheng Wei; Chi He

Chemical Physics Impact (Jun 2023)

The different effect of SO2 on Zn-poisoned commercial V2O5-WO3/TiO2 catalysts with varied Zn loading

Yanke Yu,
Mengqiao Geng,
Jiahang Li,
Jingjing Wang,
Desheng Wei,
Chi He

Affiliations

Yanke Yu: Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China
Mengqiao Geng: Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China
Jiahang Li: Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China
Jingjing Wang: Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China
Desheng Wei: Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China
Chi He: Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China; State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China; National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, PR China; Corresponding author at: Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China.

Journal volume & issue: Vol. 6
p. 100150

Abstract

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Commercial V2O5-WO3/TiO2 (VWTi) catalysts used in NH3-SCR reaction with varied Zn loading were prepared and then effect of SO2 on Zn-poisoned VWTi catalysts was investigated. Zn could cause the deactivation of VWTi catalysts. Nevertheless, the effect of SO2 on Zn-poisoned VWTi catalysts varied with Zn loading. For Zn-poisoned catalyst with low content of Zn (1.0 wt.%, ZnL), SO2 would promote the activity recovery of the catalyst. However, SO2 had no influence on the Zn-poisoned catalyst with high Zn content (4.0 wt.%, ZnH). The catalyst was characterized by N2 adsorption-desorption, XRD, XPS, SO2-TPD, NH3-TPD, H2-TPR and in situ DRIFTS. Tri-coordinated sulfate species were formed on ZnL sample in the presence of SO2, and the sulfate species could form new Brønsted acid sites, causing the recovery of activity. But ZnSO4 was appeared and no Brønsted acid sites formed on ZnH sample under SO2, thus the activity of ZnH sample changed little.

Published in Chemical Physics Impact

ISSN: 2667-0224 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics; Science: Chemistry
Website: https://www.journals.elsevier.com/chemical-physics-impact/

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