Multifunctional hydrotalcite-derived K/MnMgAlO catalysts used for soot combustion, NOx storage and simultaneous soot-NOx removal
文献类型：期刊论文
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| 作者 | Li, Q; Meng, M; Dai, FF; Zha, YQ; Xie, YN; Hu, TD; Zhang, J; Xie YN(谢亚宁) ; Hu TD(胡天斗); Zhang J(张静)
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| 刊名 | CHEMICAL ENGINEERING JOURNAL
 ; CHEMICAL ENGINEERING JOURNAL
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| 出版日期 | 2012 ; 2012 |
| 卷号 | 184页码:106-112 |
| 关键词 | Hydrotalcite Soot combustion NOx storage NOx reduction Mechanism Hydrotalcite Soot combustion NOx storage NOx reduction Mechanism |
| DOI | 10.1016/j.cej.2012.01.009 |
| 英文摘要 | A series of hydrotalcite-derived K/MnMgAlO catalysts were synthesized by co-precipitation and impregnation methods. Their catalytic performances for soot combustion, NOx storage and simultaneous soot-NOx removal were evaluated, respectively. Techniques of TG/DTA, BET, XRD, EXAFS, and in situ DRIFTS were employed for catalyst characterization. The catalyst K/Mn1.5Mg1.5AlO containing 7.5 wt% K shows not only the highest soot oxidation rate of 58.0 mu gs(-1) per gram catalyst, but also the maximal NOx reduction percentage of 26.9%. Over the catalysts containing K less than 10 wt%, the soot combustion follows oxygen spillover mechanism, while over those containing more than 10 wt% K it follows a different mechanism involving the participation of potassium nitrate species. In situ DRIFTS results indicate that introduction of proper amount of K can facilitate the formation of monodentate nitrate, which shows higher reactivity with soot than nitrite, chelating bidentate nitrate and ionic nitrate species. In the catalysts promoted by K, a new phase namely K2Mn4O8 was identified, which is highly active for soot combustion and NOx reduction by soot. (C) 2012 Elsevier B.V. All rights reserved.; A series of hydrotalcite-derived K/MnMgAlO catalysts were synthesized by co-precipitation and impregnation methods. Their catalytic performances for soot combustion, NOx storage and simultaneous soot-NOx removal were evaluated, respectively. Techniques of TG/DTA, BET, XRD, EXAFS, and in situ DRIFTS were employed for catalyst characterization. The catalyst K/Mn1.5Mg1.5AlO containing 7.5 wt% K shows not only the highest soot oxidation rate of 58.0 mu gs(-1) per gram catalyst, but also the maximal NOx reduction percentage of 26.9%. Over the catalysts containing K less than 10 wt%, the soot combustion follows oxygen spillover mechanism, while over those containing more than 10 wt% K it follows a different mechanism involving the participation of potassium nitrate species. In situ DRIFTS results indicate that introduction of proper amount of K can facilitate the formation of monodentate nitrate, which shows higher reactivity with soot than nitrite, chelating bidentate nitrate and ionic nitrate species. In the catalysts promoted by K, a new phase namely K2Mn4O8 was identified, which is highly active for soot combustion and NOx reduction by soot. (C) 2012 Elsevier B.V. All rights reserved. |
| 学科主题 | Engineering ; Engineering |
| 收录类别 | SCI |
| WOS记录号 | WOS:000301908100013 ; WOS:000301908100013 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/223845]  |
| 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 | Li, Q,Meng, M,Dai, FF,et al. Multifunctional hydrotalcite-derived K/MnMgAlO catalysts used for soot combustion, NOx storage and simultaneous soot-NOx removal, Multifunctional hydrotalcite-derived K/MnMgAlO catalysts used for soot combustion, NOx storage and simultaneous soot-NOx removal[J]. CHEMICAL ENGINEERING JOURNAL, CHEMICAL ENGINEERING JOURNAL,2012, 2012,184, 184:106-112, 106-112. |
| APA | Li, Q.,Meng, M.,Dai, FF.,Zha, YQ.,Xie, YN.,...&张静.(2012).Multifunctional hydrotalcite-derived K/MnMgAlO catalysts used for soot combustion, NOx storage and simultaneous soot-NOx removal.CHEMICAL ENGINEERING JOURNAL,184,106-112. |
| MLA | Li, Q,et al."Multifunctional hydrotalcite-derived K/MnMgAlO catalysts used for soot combustion, NOx storage and simultaneous soot-NOx removal".CHEMICAL ENGINEERING JOURNAL 184(2012):106-112. |
入库方式： OAI收割
来源：高能物理研究所
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