Experimental Study on Regeneration of SCR De-NOx catalysts

doi:10.11930/j.issn.1004-9649.2014.8.150.3

Abstract

Abstract: The catalyst adopted in the selective catalytic reduction (SCR) flue gas denitrification for thermal power plants is very expensive, which makes it necessary to regenerate the used catalyst. Seven regeneration liquids were prepared and used to regenerate the typically used SCR De-NO_x catalyst samples from coal-fired boilers. Then the denitrification efficiency and SO₂/SO₃ conversion rate of the regenerated catalysts were tested. SEM and EDS analyses on the micro structure and element composition of the fresh and regenerated catalysts were also conducted to evaluate the regeneration efficiency and figure out the reasons for the decrease of catalytic efficiency. The results show that the De-NO_x efficiency of the used catalyst regenerate by the optimum formula regeneration liquid is up to 72.2%, which is 92.8% of fresh catalyst efficiency and 10% higher than that of the catalyst before regeneration. This means that optimum formula regeneration liquid has a promising perspective for the engineering applications.

Key words: flue gas denitrification, SCR, De-NOx catalyst, catalyst regeneration, SEM, EDS

CLC Number:

TK229.6

PAN Si-wei, YANG Jian-bo, CHEN Dong-lin, DENG Tao. Experimental Study on Regeneration of SCR De-NO_x catalysts[J]. Electric Power, 2014, 47(8): 150-153.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2014.8.150.3

https://www.electricpower.com.cn/EN/Y2014/V47/I8/150

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Experimental Study on Regeneration of SCR De-NO_x catalysts

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