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	Highly efficient MnOx/biochar catalysts obtained by air oxidation for low-temperature NH3-SCR of NO
	Liu, Lu1; Wang, Bangda1,2; Yao, Xiaojiang3; Yang, Lin1,2; Jiang, Wenju1,2; Jiang, Xia1,2
	2021
摘要	In this study, a novel air oxidation treatment strategy was proposed to modify Mn-doped biochar catalysts for enhanced removal of NO at low temperature. The pre-oxidation at 400 degrees C and post-oxidation at 250 degrees C under air atmosphere was applied respectively before and after impregnating biochar with Mn-containing solution (BC-OMO). The results showed that, after pre-oxidation the specific surface area and total pore volume of the sample increased to 734 m(2)/g and 0.440 cm(3)/g respectively in comparison with those without pre-oxidation (557 m(2)/g and 0.353 cm(3)/g). After further post-oxidation, the contents of Mn4+ and chemisorbed oxygen (O-alpha) in BC-OMO increased to 36.2% and 49.8% respectively from those without air oxidation (25.4% and 38.7%), which could enhance the surface acidity and redox capabilities of the catalysts. The denitration results showed that the conversion efficiency of NO for BC-OMO catalyst reached as high as 97.0% at 150 degrees C, which was significantly higher than that without air oxidation (61.8%). The mechanisms for improving denitration efficiency of MnOx/biochar catalysts by pre- and post-air oxidation were also discussed.
关键词	Air oxidation Low-temperature NH3-SCR Biochar catalysts MnOx
DOI	10.1016/j.fuel.2020.119336
发表期刊	FUEL
ISSN	0016-2361
卷号	283页码:8
通讯作者	Jiang, Xia(xjiang@scu.edu.cn)
收录类别	SCI
WOS记录号	WOS:000584919700130
语种	英语