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Catalytic NO Reduction by CO over Ca-Fe Oxides in the Presence of O-2 with Sintering Flue Gas Circulation
Li, Chaoqun1,2; Han, Qingzhen1; Zhu, Tingyu1,3; Xu, Wenqing1,3
2020-11-25
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume59Issue:47Pages:20624-20629
AbstractFlue 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.
DOI10.1021/acs.iecr.0c03843
Language英语
Funding ProjectNational Key Research and Development Program of China[2017YFC0210304] ; Hebei Science and Technology Major Special Projects[19074013Z] ; National Natural Science Foundation of China[51938014]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Key Research and Development Program of China ; Hebei Science and Technology Major Special Projects ; National Natural Science Foundation of China
WOS IDWOS:000595543000006
PublisherAMER CHEMICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/43175
Collection中国科学院过程工程研究所
Corresponding AuthorXu, Wenqing
Affiliation1.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
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China
Recommended Citation
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.
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