The Poisoning of V<sub>2</sub>O<sub>5</sub>-WO<sub>3</sub>/TiO<sub>2</sub> and V<sub>2</sub>O<sub>5</sub>-Ce(SO<sub>4</sub>)<sub>2</sub>/TiO<sub>2</sub> SCR Catalysts by KCl and The Partial Regeneration by SO<sub>2</sub>
Poisoning effects by alkali metal chlorides is one of the major reasons for the deactivation of SCR catalyst in biomass-fired plants. In this study, the influence of KCl on two vanadium-based catalysts with different promoters, V<sub>2</sub>O<sub>5</sub>-WO<sub>3</su...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-02-01
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| Series: | Catalysts |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4344/10/2/207 |
| Summary: | Poisoning effects by alkali metal chlorides is one of the major reasons for the deactivation of SCR catalyst in biomass-fired plants. In this study, the influence of KCl on two vanadium-based catalysts with different promoters, V<sub>2</sub>O<sub>5</sub>-WO<sub>3</sub>/TiO<sub>2</sub> and V<sub>2</sub>O<sub>5</sub>-Ce(SO<sub>4</sub>)<sub>2</sub>/TiO<sub>2</sub>, was investigated. The catalytic activity of the fresh V<sub>2</sub>O<sub>5</sub>-WO<sub>3</sub>/TiO<sub>2</sub> was higher than that of V<sub>2</sub>O<sub>5</sub>-Ce(SO<sub>4</sub>)<sub>2</sub>/TiO<sub>2</sub> at low temperatures. V<sub>2</sub>O<sub>5</sub>-Ce(SO<sub>4</sub>)<sub>2</sub>/TiO<sub>2</sub> performed better than V<sub>2</sub>O<sub>5</sub>-WO<sub>3</sub>/TiO<sub>2</sub> when KCl was deposited on the catalyst surface. Both poisoned catalysts were efficiently regenerated by SO<sub>2</sub> treatment. The characterization results show that the reducibility and acidity of the catalysts were weakened by KCl deposition but regenerated by SO<sub>2</sub>. |
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| ISSN: | 2073-4344 |