镧掺杂Fe-beta分子筛CO选择性催化还原N<sub>2</sub>O反应性能

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Abstract La/Fe-beta zeolite catalyst was prepared by using impregnation method and used for CO selective catalytic reduction of N₂O. The results showed that the doping of La could enhance the CO oxidation activity, and thus improved the N₂O conversion efficiency of Fe-beta zeolite, reaching higher than 95% at 350℃. H₂-TPR results illustrated that the existence of La could influence the distribution of Fe species on La/Fe-beta surface, and reduce the resistance for O₂ and H₂O. In addition, effects of HCl on Fe-beta and La/Fe-beta zeolites in waste incineration tail gas were also investigated. Combining the results of CO oxidation activities, H₂-TPR and O₂-TPD, it was found that the formation of stable FeCl_x species, poor reduction performance and CO oxidation activity were the main causes of HCl poisoning in N₂O conversion activity.

Key words： CO selective catalytic reduction of N₂O Fe-beta zeolite La-doping waste incineration HCl poisoning

Received: 27 July 2022

PACS:

X701.7

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	Articles by authors
	ZHAO Fei-lin
	ZENG Jie
	XIAO Rong
	QIU Lei
	GUO Wen
	CHEN Hao-hui
	CHANG Hua-zhen

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ZHAO Fei-lin,ZENG Jie,XIAO Rong等. Selective catalytic reduction of N₂O by CO over lanthanum doped Fe-beta zeolite[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(3): 1044-1052.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I3/1044

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