K-supported catalysts for diesel soot combustion: Making a balance between activity and stability
文献类型：期刊论文
| 作者 | Li; Qian; Wang; Xiao; Chen; Hui; Xin; Ying; Tian; Guangkai |
| 刊名 | CATALYSIS TODAY
 |
| 出版日期 | 2015 |
| 卷号 | 264页码:171-179 |
| 关键词 | Cryptomelane Diesel soot combustion Infrared analysis Soot combustion Surface species Temperature programmed oxidation Temperature-programmed reduction X ray absorption fine structures |
| 英文摘要 | Two typical K-supported oxides (K/Al2O3 and K/TiO2) were selected as catalysts for diesel soot combustion in order to evaluate the relationship between activity and stability. The surface species were first characterized by X-ray powder diffraction (XRD), X-ray absorption fine-structure (XAFS), infrared analysis (IR), X-ray photoelectron spectroscopy (XPS), in situ IR of CO2 adsorption and temperature-programmed desorption of CO2 (CO2-TPD). Then the activity was studied by temperature-programmed oxidation (TPO), temperature-programmed reduction with soot (Soot-TPR) and in situ IR of soot combustion reactions. Lastly, the stability of the catalyst was checked by washing with water and analysis for K. This showed that K/TiO2 displayed negligible activity due to the immobilization of K+ ions in TiO2 to form K2Ti6O13. However, K/Al2O3 exhibited superior activity owing to the presence of active free K+ ions on the surface. The downside is the leaching of K+ ions into the effluent containing some water vapor, resulting in its poor stability - the other side of the coin for the highly active free K species. One of the suggested strategies for making a balance between activity and stability is encapsulating active K species in the channel of the catalyst as demonstrated by the tunneled cryptomelane. © 2015 Elsevier B.V. |
| 类目[WOS] | 451.1 Air Pollution Sources ; 452.3 Industrial Wastes ; 521.1 Fuel Combustion ; 641.1 Thermodynamics ; 711 Electromagnetic Waves ; 801 Chemistry ; 802.3 Chemical Operations ; 803 Chemical Agents and Basic Industrial Chemicals ; 804 Chemical Products Generally ; 921.6 Numerical Methods ; 931 Classical Physics ; Quantum Theory ; Relativity ; 931.3 Atomic and Molecular Physics ; 951 Materials Science ; 961 Systems Science |
| 收录类别 | EI |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/228917]  |
| 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,Qian,Wang,et al. K-supported catalysts for diesel soot combustion: Making a balance between activity and stability[J]. CATALYSIS TODAY,2015,264:171-179. |
| APA | Li.,Qian.,Wang.,Xiao.,Chen.,...&郑雷.(2015).K-supported catalysts for diesel soot combustion: Making a balance between activity and stability.CATALYSIS TODAY,264,171-179. |
| MLA | Li,et al."K-supported catalysts for diesel soot combustion: Making a balance between activity and stability".CATALYSIS TODAY 264(2015):171-179. |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。