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Performance of K-promoted hydrotalcite-derived CoMgAlO catalysts used for soot combustion, NOx storage and simultaneous soot-NOx removal
Li, Q; Meng, M; Tsubaki, N; Li, XG; Li, ZQ; Xie, YN; Hu, TD; Zhang, J; Xie YN(谢亚宁); Hu TD(胡天斗); Zhang J(张静)
2009
发表期刊APPLIED CATALYSIS B-ENVIRONMENTAL
卷号91期号:1-2页码:406-415
通讯作者[Li, Qian ; Meng, Ming ; Li, Xingang ; Li, Zhaoqiang] Tianjin Univ, Tianjin Key Lab Appl Catalysis Sci & Engn, Dept Catalysis Sci &Technol, Sch Chem Engn &Technol, Tianjin 300072, Peoples R China ; [Tsubaki, Noritatsu] Toyama Univ, Dept Appl Chem, Sch Engn, Toyama 9308555, Japan ; [Xie, Yaning ; Hu, Tiandou ; Zhang, Jing] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
文章类型Article
摘要A series of K-promoted hydrotalcite-derived CoMgAlO catalysts were synthesized by coprecipitation. Their catalytic performance for soot combustion, NOx storage and simultaneous soot-NOx removal was evaluated, respectively. The techniques of TG/DTA, BET, XRD, EXAFS, XPS and in situ DRIFTS were employed for catalyst characterization. When K is added to the catalyst CoMgAlO, soot combustion is largely accelerated, with the temperature (T(m)) for maximum soot conversion lowered by at least 50 degrees C. Moreover, the NOx reduction by soot over the catalysts calcined at 500-700 degrees C is also facilitated. The K-containing catalyst calcined at 600 degrees C shows not only the highest soot combustion rate, but also the maximum NOx reduction percentage of 32%, which is attributed to its high surface K/Co atomic ratio and the strong interaction between K and Co. In situ DRIFTS results reveal that NO is readily oxidized to NO(2) and stored as nitrates over K-promoted catalysts, which could be reduced by soot more efficiently. Based on these investigations, a reaction pathway for soot combustion, NOx storage and simultaneous soot-NOx removal is proposed. (C) 2009 Elsevier B.V. All rights reserved.
关键词Soot NOx Hydrotalcite-derived CoMgAlO catalysts Potassium Calcination temperature
学科领域Chemistry; Engineering
研究领域[WOS]Chemistry ; Engineering ; Chemistry ; Engineering
DOI10.1016/j.apcatb.2009.06.007
URL查看原文
语种英语
研究领域[WOS]Chemistry ; Engineering ; Chemistry ; Engineering
WOS类目Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
WOS记录号WOS:000269374400049
引用统计
被引频次:42[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/237346
专题多学科研究中心
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
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714
Li, Q,Meng, M,Tsubaki, N,et al. Performance of K-promoted hydrotalcite-derived CoMgAlO catalysts used for soot combustion, NOx storage and simultaneous soot-NOx removal[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2009,91(1-2):406-415.
APA Li, Q.,Meng, M.,Tsubaki, N.,Li, XG.,Li, ZQ.,...&张静.(2009).Performance of K-promoted hydrotalcite-derived CoMgAlO catalysts used for soot combustion, NOx storage and simultaneous soot-NOx removal.APPLIED CATALYSIS B-ENVIRONMENTAL,91(1-2),406-415.
MLA Li, Q,et al."Performance of K-promoted hydrotalcite-derived CoMgAlO catalysts used for soot combustion, NOx storage and simultaneous soot-NOx removal".APPLIED CATALYSIS B-ENVIRONMENTAL 91.1-2(2009):406-415.
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