Performance of Ce substituted hydrotalcite-derived mixed oxide catalysts Co2.5Mg0.5Al1-x%Cex%O used for soot combustion and simultaneous NOx-soot removal

	Performance of Ce substituted hydrotalcite-derived mixed oxide catalysts Co2.5Mg0.5Al1-x%Cex%O used for soot combustion and simultaneous NOx-soot removal
	Dai, FF; Meng, M; Zha, YQ; Li, ZQ; Hu, TD; Xie, YN; Zhang, J;胡天斗; Xie YN(谢亚宁); Zhang J(张静)
刊名	FUEL PROCESSING TECHNOLOGY
	2012
卷号	104 页码:43-49
关键词	Hydrotalcite Cerium Soot combustion NOx reduction by soot
英文摘要	The Co2.5Mg0.5Al1-x%Cex%O hydrotalcite-derived catalysts (CMACex) with different Ce/AI atomic ratios were synthesized by co-precipitation, which simultaneously possess multiple properties for soot combustion, lean-burn NOx storage and simultaneous NOx-soot removal. The techniques including XRD, EXAFS, BET, H-2-TPR, O-2-TPD and in-situ DRIFTS were used for catalyst characterization. It is found that Ce-substituted catalysts are much more active than Ce-free one for soot combustion. NOx storage and simultaneous NOx-soot removal. Among the catalysts containing Ce. CMACe8 exhibits the highest performance, showing the lowest temperature of 384 degrees C for the maximal soot oxidation rate (T-m), the largest NOx storage capacity (336 mu mol g(-1)), and the largest NOx reduction percentage of 15.4%. Compared with Ce-free sample. Ce-substitution increases the specific surface area, the redox properties and the amount of surface lattice oxygen species of the catalyst. The optimal Ce-substitution amount in Co2.5Mg0.5Al1-x%Cex%O is x=8. In-situ DRIFTS results reveal that NO is readily oxidized to NO2 and stored as nitrates over Ce-substituted catalysts, which are very reactive intermediates for simultaneous NOx-soot removal. (C) 2012 Elsevier B.V. All rights reserved.
学科主题	Chemistry; Energy & Fuels; Engineering
收录类别	SCI
WOS记录号	WOS:000310411500007
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/223786]
专题	高能物理研究所_多学科研究中心
推荐引用方式 GB/T 7714	Dai, FF,Meng, M,Zha, YQ,et al. Performance of Ce substituted hydrotalcite-derived mixed oxide catalysts Co2.5Mg0.5Al1-x%Cex%O used for soot combustion and simultaneous NOx-soot removal[J]. FUEL PROCESSING TECHNOLOGY,2012,104:43-49.
APA	Dai, FF.,Meng, M.,Zha, YQ.,Li, ZQ.,Hu, TD.,...&张静.(2012).Performance of Ce substituted hydrotalcite-derived mixed oxide catalysts Co2.5Mg0.5Al1-x%Cex%O used for soot combustion and simultaneous NOx-soot removal.FUEL PROCESSING TECHNOLOGY,104,43-49.
MLA	Dai, FF,et al."Performance of Ce substituted hydrotalcite-derived mixed oxide catalysts Co2.5Mg0.5Al1-x%Cex%O used for soot combustion and simultaneous NOx-soot removal".FUEL PROCESSING TECHNOLOGY 104(2012):43-49.