Effect of Operation Conditions on Activity of De-NOx SCR Catalysts before and after Poisoned by Alkali Metal

Xiao Qi Liu; Chang An Wang; Yong Bo Du; Qiang Lv; Yong Gang Zhao; Yong He Guo; Lei Deng; Jiao Liu; Jia Ge; De Fu Che

doi:10.4028/www.scientific.net/AMR.955-959.702

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 955-959Effect of Operation Conditions on Activity of...

Effect of Operation Conditions on Activity of De-NO_x SCR Catalysts before and after Poisoned by Alkali Metal

Abstract:

Zhundong coal has a huge proved reserve and many excellent properties. However, the alkali metal content in Zhundong coal is distinctly high, which can accelerate the deactivation of De-NO_x SCR catalysts. Using solution impregnation method, the effect of operation conditions on activity of SCR catalysts before and after poisoned by sodium was experimentally investigated. The results show that the NO reduction ratio raises with the increase of NH₃/NO ratio. Longer residence time results in higher NO reduction ratio. Compared with catalyst poisoned by NaCl, residence time presents less influence on activity of fresh catalyst in 250-400 ^oC, which is beneficial for De-NO_x process. Both O₂ and NO concentration have no apparent influence on NO reduction ratio.

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Periodical:

Advanced Materials Research (Volumes 955-959)

Pages:

702-705

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.955-959.702

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Online since:

June 2014

Authors:

Xiao Qi Liu, Chang An Wang*, Yong Bo Du, Qiang Lv, Yong Gang Zhao, Yong He Guo, Lei Deng, Jiao Liu, Jia Ge, De Fu Che

Keywords:

Alkali Metal, Operation Condition, Scr Catalyst, Zhundong Coal

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