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Hydrotalcite-Derived MnxMg3-xAlO Catalysts Used for Soot Combustion, NOx Storage and Simultaneous Soot-NOx Removal
Li, QA; Meng, M; Xian, H; Tsubaki, N; Li, XG; Xie, YN; Hu, TD; Zhang, J; Xie YN(谢亚宁); Hu TD(胡天斗); Zhang J(张静)
2010
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume44Issue:12Pages:4747-4752
Corresponding Author[Li, Qian ; Meng, Ming ; Xian, Hui ; Li, Xingang] Tianjin Univ, Tianjin Key Lab Appl Catalysis Sci & Engn, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China ; [Tsubaki, Noritatsu] Toyama Univ, Sch Engn, Dept Appl Chem, Toyama 9308555, Japan ; [Xie, Yaning ; Hu, Tiandou ; Zhang, Jing] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
SubtypeArticle
AbstractThe hydrotalcite-based MnxMg3AlO catalysts with different Mn: Mg atomic ratios were synthesized by coprecipitation, and employed for soot combustion, NOx storage and simultaneous soot-NOx removal. It is shown that with the increase of Mn content in the hydrotalcite-based MnxMg3-xAlO catalysts the major Mn-related species vary from MnAl2O4 and Mg2MnO4 to Mn3O4 and Mn2O3. The catalyst Mn1.5Mg1.5AlO displays the highest soot combustion activity with the temperature for maximal soot combustion rate decreased by 210 degrees C, as compared with the Mn-free catalyst The highly reducible Mn4+ ions in Mg2MnO4 are identified as the most active species for soot combustion. For NOx storage, introduction of Mn greatly influences bulk NOx storage, with the adsorbed NOx species varying from linear nitrites to ionic and chelating bidentate nitrates gradually. The coexistence of highly oxidative Mn4+ and highly reductive Mn2+ in Mn1.0Mg2.0AlO is favorable to the simultaneous soot-NOx removal, giving a NOx reduction percentage of 24%. In situ DRIFTS reveals that the ionic nitrate species are more reactive with soot than nitrites and chelating bidentate nitrates, showing higher NOx reduction efficiency.
Subject AreaEngineering; Environmental Sciences & Ecology
DOI10.1021/es9033638
URL查看原文
Indexed BySCI ; ADS
Language英语
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Environmental Sciences
WOS IDWOS:000278617000060
ADS Bibcode2010EnST...44.4747L
ADS URLhttps://ui.adsabs.harvard.edu/abs/2010EnST...44.4747L
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2010EnST...44.4747L/citations
Citation statistics
Cited Times:10 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/239996
Collection多学科研究中心
实验物理中心
中国科学院高能物理研究所_中国散裂中子源
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Li, QA,Meng, M,Xian, H,et al. Hydrotalcite-Derived MnxMg3-xAlO Catalysts Used for Soot Combustion, NOx Storage and Simultaneous Soot-NOx Removal[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2010,44(12):4747-4752.
APA Li, QA.,Meng, M.,Xian, H.,Tsubaki, N.,Li, XG.,...&张静.(2010).Hydrotalcite-Derived MnxMg3-xAlO Catalysts Used for Soot Combustion, NOx Storage and Simultaneous Soot-NOx Removal.ENVIRONMENTAL SCIENCE & TECHNOLOGY,44(12),4747-4752.
MLA Li, QA,et al."Hydrotalcite-Derived MnxMg3-xAlO Catalysts Used for Soot Combustion, NOx Storage and Simultaneous Soot-NOx Removal".ENVIRONMENTAL SCIENCE & TECHNOLOGY 44.12(2010):4747-4752.
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