| Characterization of the NO-soot combustion process over La0.8Ce0.2Mn0.7Bi0.3O3 catalyst | |
Bin F(宾峰) ; Song CL; Lv G; Li XD; Cao XF; Song JO; Wu SH; Song, CL (reprint author), Tianjin Univ, State Key Lab Engines, Tianjin 300072, Peoples R China.
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| Source Publication | Proceedings of The Combustion Institute
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| 2015 | |
| Volume | 35Issue:2Pages:2241-2248 |
| ISSN | 1540-7489 |
| Abstract | The combustion of diesel soot in NO + O-2/He atmospheres was investigated by temperature-programmed oxidation (TPO), X-ray photoelectron spectroscopy (XPS), and in-situ diffuse reflectance Fourier transform (DRIFT) technology, with the aim to demonstrate the participation of nitric oxide species and surface carbon-oxygenated complexes in the process. According to the TPO results, two main adsorption periods for nitric oxide species were observed: one was from 50 to about 180 degrees C and the other occurred in the temperature range of 180-400 degrees C. The DRIFT results indicated that the first adsorption period was mainly associated with weakly adsorbed NO, bidentate nitrite and unidentate nitrate, monodentate nitrate, chelating nitrate and bridging nitrate, while the second uptake was related to nitrite and free nitrate species. Based on the XPS and DRIFT results, possible reaction processes for the NOx-soot combustion are proposed based on the Langmuir-Hinshelwood mechanism. First, the carbon-oxygenated groups, including carboxyls, lactones, and anhydrides were formed at free carbon sites by the oxidation of dissociative nitrates. Such moieties were so stable that they could not be further oxidized, even at 400 degrees C, without the presence of a catalyst. Second, the adsorption of NO + O-2 resulted in the formation of nitrates on the MnOx surface of the catalyst. Then, the surface-activated nitrates, with activity decreasing in the order: chelating nitrates > bridging nitrates > monodentate nitrates > free ionic nitrates, further oxidized these carbon-oxygenated complexes with subsequent release of CO2, NO and N-2. (C) 2014 The Combustion Institute. Published by Elsevier Inc. All rights reserved. |
| Keyword | Soot Nitrous Oxide Catalytic Combustion Perovskite Catalyst |
| Subject Area | Thermodynamics ; Energy & Fuels ; Engineering |
| DOI | 10.1016/j.proci.2014.08.028 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000348048800127 |
| WOS Keyword | DIESEL SOOT ; SURFACE-CHEMISTRY ; MIXED OXIDES ; OXIDATION ; TEMPERATURE ; COMPLEX ; NH3 |
| WOS Research Area | Thermodynamics ; Energy & Fuels ; Engineering |
| WOS Subject | Thermodynamics ; Energy & Fuels ; Engineering, Chemical ; Engineering, Mechanical |
| Funding Organization | This study was supported by the National Key Basic Research and Development Program (2013CB228506) and the National Natural Science Foundation of China (No. 51206119). |
| Department | LHD高效洁净燃烧(CPCR) |
| Classification | 一类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/49589 |
| Collection | 高温气体动力学国家重点实验室 |
| Corresponding Author | Song, CL (reprint author), Tianjin Univ, State Key Lab Engines, Tianjin 300072, Peoples R China. |
| Recommended Citation GB/T 7714 | Bin F,Song CL,Lv G,et al. Characterization of the NO-soot combustion process over La0.8Ce0.2Mn0.7Bi0.3O3 catalyst[J]. Proceedings of The Combustion Institute,2015,35,2,:2241-2248. |
| APA | Bin F.,Song CL.,Lv G.,Li XD.,Cao XF.,...&Song, CL .(2015).Characterization of the NO-soot combustion process over La0.8Ce0.2Mn0.7Bi0.3O3 catalyst.Proceedings of The Combustion Institute,35(2),2241-2248. |
| MLA | Bin F,et al."Characterization of the NO-soot combustion process over La0.8Ce0.2Mn0.7Bi0.3O3 catalyst".Proceedings of The Combustion Institute 35.2(2015):2241-2248. |
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| IMCAS-J2015-021.pdf（1540KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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