Performance of Ce substituted hydrotalcite-derived mixed oxide catalysts Co2.5Mg0.5Al1-x%Cex%O used for soot combustion and simultaneous NOx-soot removal
文献类型：期刊论文
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| 作者 | 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)
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| 刊名 | FUEL PROCESSING TECHNOLOGY
 ; FUEL PROCESSING TECHNOLOGY
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| 出版日期 | 2012 ; 2012 |
| 卷号 | 104页码:43-49 |
| 关键词 | Hydrotalcite Cerium Soot combustion NOx reduction by soot Hydrotalcite Cerium Soot combustion NOx reduction by soot |
| DOI | 10.1016/j.fuproc.2012.07.002 |
| 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.; 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 ; Chemistry; Energy & Fuels; Engineering |
| 收录类别 | SCI |
| WOS记录号 | WOS:000310411500007 ; WOS:000310411500007 |
| 公开日期 | 2016-05-03 |
| 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, 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, FUEL PROCESSING TECHNOLOGY,2012, 2012,104, 104:43-49, 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. |
入库方式： OAI收割
来源：高能物理研究所
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