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Performance of K and Ni substituted La1-xKxCo1-yNiyO3-delta perovskite catalysts used for soot combustion, NOx storage and simultaneous NOx-soot removal
Li, ZQ; Meng, M; Dai, FF; Hu, TD; Xie, YN; Zhang, J;胡天斗; Xie YN(谢亚宁); Zhang J(张静)
2012
Source PublicationFUEL
Volume93Issue:1Pages:606-610
AbstractThe nanometric substituted perovskite catalysts La1-xKxCo1-yNiyO3-delta (x = 0, 0.1; y = 0, 0.05, 0.1) were synthesized by citric acid complexation method, and employed for soot combustion, NOx storage and simultaneous NOx-soot removal. Their structures and physico-chemical properties were characterized by XRD, EXAFS, BET, SEM, H-2-TPR, and XPS techniques. When K and Ni are simultaneously introduced into LaCoO3 catalyst, soot combustion is largely accelerated, with the temperature (T-m) for maximal soot conversion lowered by at least 50 degrees C; moreover, NOx reduction by soot is also facilitated. The La0.9K0.1Co0.95Ni0.05O3-delta catalyst exhibits not only the lowest T-m (367 degrees C) temperature but also the highest soot combustion rate (67.3 mu g/s g catalyst). Meanwhile, the NOx reduction percentage over this catalyst can reach 21%. The kinetic results show that the activation energy for soot combustion over La0.9K0.1Co0.95Ni0.05O3-delta (81.34 kJ mol(-1)) is much lower than that over LaCoO3 (107.7 kJ mol(-1)). The H-2-TPR and XPS results show that the La0.9K0.1Co0.95Ni0.05O3-delta catalyst possesses better redox properties, more tetravalent cobalt ions and larger amount of surface adsorbed oxygen species, which determines its novel performance for soot combustion, NOx storage and soot-NOx removal. (C) 2011 Elsevier Ltd. All rights reserved.
KeywordSoot combustion NOx storage and reduction Perovskite K Ni
Subject AreaEnergy & Fuels; Engineering
DOI10.1016/j.fuel.2011.10.040
Indexed BySCI
WOS IDWOS:000299541400074
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/224023
Collection多学科研究中心
Recommended Citation
GB/T 7714
Li, ZQ,Meng, M,Dai, FF,et al. Performance of K and Ni substituted La1-xKxCo1-yNiyO3-delta perovskite catalysts used for soot combustion, NOx storage and simultaneous NOx-soot removal[J]. FUEL,2012,93(1):606-610.
APA Li, ZQ.,Meng, M.,Dai, FF.,Hu, TD.,Xie, YN.,...&张静.(2012).Performance of K and Ni substituted La1-xKxCo1-yNiyO3-delta perovskite catalysts used for soot combustion, NOx storage and simultaneous NOx-soot removal.FUEL,93(1),606-610.
MLA Li, ZQ,et al."Performance of K and Ni substituted La1-xKxCo1-yNiyO3-delta perovskite catalysts used for soot combustion, NOx storage and simultaneous NOx-soot removal".FUEL 93.1(2012):606-610.
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