Catalytic NO Reduction by CO over Ca-Fe Oxides in the Presence of O-2 with Sintering Flue Gas Circulation

doi:10.1021/acs.iecr.0c03843

	Catalytic NO Reduction by CO over Ca-Fe Oxides in the Presence of O-2 with Sintering Flue Gas Circulation
	Li, Chaoqun 1,2; Han, Qingzhen 2; Zhu, Tingyu 2,3; Xu, Wenqing 2,3
刊名	INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
	2020-11-25
卷号	59 期号:47 页码:20624-20629
ISSN号	0888-5885
DOI	10.1021/acs.iecr.0c03843
英文摘要	Flue gas circulation is an important method to reduce NOx emission in the iron ore sintering process. In flue gas circulation, NOx is eliminated mainly through the reduction reaction with C or CO, in which CaFe2O4 plays an important role as the catalyst. In this paper, CaFe2O4 was synthesized by the ceramic rout; and the catalytic performance was investigated. The experimental results show that the reduced calcium ferrite (RCF) was superior to unreduced samples in catalytic activity and oxygen tolerance. The results of density functional theory (DFT) calculation and characterization showed that the RCF was in an electron-deficient state, which led to its higher catalytic activity. The electron-deficient state is more conducive to the complexation between the sample and oxygen under an oxygen-containing atmosphere, improving the O-2 tolerance in the CO-NO reaction. The results suggest that decreasing the O-2 content in the circulating flue gas will enhance the reducing atmosphere in the sintering bed and facilitate the catalytic reaction between CO and NO, which is beneficial for NOx removal.
资助项目	National Key Research and Development Program of China[2017YFC0210304] ; Hebei Science and Technology Major Special Projects[19074013Z] ; National Natural Science Foundation of China[51938014]
WOS研究方向	Engineering
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000595543000006
资助机构	National Key Research and Development Program of China ; Hebei Science and Technology Major Special Projects ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/43174]
专题	中国科学院过程工程研究所
通讯作者	Xu, Wenqing
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Res Ctr Proc Pollut Control, Natl Engn Lab Hydromet Cleaner Prod Technol, State Key Lab Multiphase Complex Syst,Inst Proc E, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China
推荐引用方式 GB/T 7714	Li, Chaoqun,Han, Qingzhen,Zhu, Tingyu,et al. Catalytic NO Reduction by CO over Ca-Fe Oxides in the Presence of O-2 with Sintering Flue Gas Circulation[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2020,59(47):20624-20629.
APA	Li, Chaoqun,Han, Qingzhen,Zhu, Tingyu,&Xu, Wenqing.(2020).Catalytic NO Reduction by CO over Ca-Fe Oxides in the Presence of O-2 with Sintering Flue Gas Circulation.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,59(47),20624-20629.
MLA	Li, Chaoqun,et al."Catalytic NO Reduction by CO over Ca-Fe Oxides in the Presence of O-2 with Sintering Flue Gas Circulation".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 59.47(2020):20624-20629.