Review of SO2 and H2O Poisoning over Commercial Vanadium-Titanium Catalysts in the Selective Catalytic Reduction Denitration

doi:10.11930/j.issn.1004-9649.2016.12.168.06

Abstract

Abstract: So far the technology of selective catalytic reduction of NOx with NH3 has been widely applied in power plants, of which the hot topics such as the effect of flue gas composition on catalyst performance, catalyst poisoning and the production of fine particles have been drawing more attentions. In this review the discussion is focused on the poisoning mechanism, influencing factors and optimization measures of SO2 and H2O in flue gas on the commercial V2O5-WO3/TiO2 catalysts. The poisoning mechanism of SO2 mainly includes ammonium sulfates blocking, mental sulfate absorbed on the active sites and the competitive absorption with NH3 and NO. The poisoning mechanism of H2O refers to the deteriorating NOx removal efficiency of the catalyst due to the competitive adsorption with NH3 and NO, which promotes the production of ammonium sulfate and inhibits the reaction between ammonium sulfates and NO, etc.

Key words: flue gas denitration, selective catalytic reduction, catalyst poisoning, SO2, H2O, ammonium bisulfate

CLC Number:

TM621
X511

YU Yuexi, LIAO Yongjin, SHU Han, SHI Yajuan, ZHANG Yaping, YANG Linjun. Review of SO2 and H2O Poisoning over Commercial Vanadium-Titanium Catalysts in the Selective Catalytic Reduction Denitration[J]. Electric Power, 2016, 49(12): 168-173.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2016.12.168.06

https://www.electricpower.com.cn/EN/Y2016/V49/I12/168

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