The combined promotive effect of SO2 and HCl on Pb-poisoned commercial
NH3-SCR V2O5-WO3/TiO2 catalysts |
Jifa Miao, Huirong Li, Qingfa Su, Yanke Yu, Yanting Chen, Jinsheng Chen*, Jinxiu Wang* |
In this study, the deactivation of commercial V2O5-WO3/TiO2 selective catalytic reduction catalysts by Pb was discussed primarily, and the combined promotive effects of SO2 and HCl on Pb-poisoned V2O5-WO3/TiO2 catalysts were studied. The results show that the treatment with SO2 and HCl markedly improves the NOx conversion of Pb-poisoned catalysts. SO2 and HCl react with Pb chemisorbed on V2O5, which increases effectively the ratio of V5+ and active oxygen species and the amount of acid sites. |
Key words:SCR catalysts; Pb-poisoned; SO2 promotive effect; HCl promotive effect. |
Volume:125 Page:118-122 Journal:CATALYSIS COMMUNICATIONS |
https://doi.org/10.1016/j.catcom.2019.03.030
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