TY - JOUR
T1 - The different effect of SO2 on Zn-poisoned commercial V2O5-WO3/TiO2 catalysts with varied Zn loading
AU - Yu, Yanke
AU - Geng, Mengqiao
AU - Li, Jiahang
AU - Wang, Jingjing
AU - Wei, Desheng
AU - He, Chi
N1 - Publisher Copyright:
© 2022 The Authors
PY - 2023/6
Y1 - 2023/6
N2 - 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.
AB - 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.
KW - Activity recovery
KW - Deactivation
KW - NH-SCR
KW - SO
KW - Tri-coordinated sulfate
KW - Zn
UR - https://www.scopus.com/pages/publications/85145606488
U2 - 10.1016/j.chphi.2022.100150
DO - 10.1016/j.chphi.2022.100150
M3 - 文章
AN - SCOPUS:85145606488
SN - 2667-0224
VL - 6
JO - Chemical Physics Impact
JF - Chemical Physics Impact
M1 - 100150
ER -