Citation: Simiao Zang, Guizhen Zhang, Wenge Qiu, Liyun Song, Ran Zhang, Hong He. Resistance to SO₂ poisoning of V₂O₅/TiO₂-PILC catalyst for the selective catalytic reduction of NO by NH₃[J]. Chinese Journal of Catalysis, ;2016, 37(6): 888-897. doi: 10.1016/S1872-2067(15)61083-X shu

Resistance to SO₂ poisoning of V₂O₅/TiO₂-PILC catalyst for the selective catalytic reduction of NO by NH₃

Key Laboratory of Beijing on Regional Air Pollution Control; Beijing Key Laboratory for Green Catalysis and Separation; Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

Received Date: 29 January 2016
Revised Date: 5 March 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (21277009, 21577005).

A titania pillared interlayered clay (Ti-PILC) supported vanadia catalyst (V₂O₅/TiO₂-PILC) was prepared by wet impregnation for the selective catalytic reduction (SCR) of NO with ammonia. Compared to the traditional V₂O₅/TiO₂ and V₂O₅-MoO₃/TiO₂ catalysts, the V₂O₅/TiO₂-PILC catalyst exhibited a higher activity and better SO₂ and H₂O resistance in the NH₃-SCR reaction. Characterization using TPD, in situ DRIFT and XPS showed that surface sulfate and/or sulfite species and ionic SO₄²^-species were formed on the catalyst in the presence of SO₂. The ionic SO₄²^-species on the catalyst surface was one reason for deactivation of the catalyst in SCR. The formation of the ionic SO₄²^- species was correlated with the amount of surface adsorbed oxygen species. Less adsorbed oxygen species gave less ionic SO₄²^- species on the catalyst.
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Resistance to SO₂ poisoning of V₂O₅/TiO₂-PILC catalyst for the selective catalytic reduction of NO by NH₃