Enhanced NOx conversion by coupling NOx storage-reduction with CO adsorption-oxidation over the combined Pd-K/MgAlO and Pd/MgAlO catalysts
文献类型：会议论文
| 作者 | Chen, Hui; Zhang, Yexin; Xin, Ying; Li, Qian; Zhang, Zhaoliang; Jiang, Zheng; Ma, Yuping; Zhou, Hao; Zhang, Jian |
| 出版日期 | 2015 |
| 会议日期 | AUG 24-27, 2014 |
| 关键词 | LEAN-BURN ENGINE THERMAL-STABILITY TRAP CATALYSTS MIXED OXIDES TEMPERATURE CAPACITY PERFORMANCE PT/AL2O3 BEHAVIOR SUPPORT |
| 卷号 | 258 |
| DOI | 10.1016/j.cattod.2014.12.019 |
| 英文摘要 | NOx conversion was enhanced by coupling NOx storage-reduction (NSR) with CO adsorption-oxidation (CAO), which was observed in NSR lean-rich cycle tests with CO as a reductant on catalysts of Mg-Al mixed oxides supported Pd (Pd/MgAlO) and Pd-K (Pd-K/MgAlO). CO was adsorbed on Pd sites in the rich condition and then oxidized by gaseous NO via Eley-Rideal mechanism during the transition from the rich condition to the lean condition, which results in an enhanced NO conversion. This is confirmed by different configuration experiments of Pd-K/MgAlO and Pd/MgAlO, acting as NSR and CAO catalysts, respectively. The intimate mixture of Pd-K/MgAlO and Pd/MgAlO showed much higher activity due to the resultant coupling effect of NSR with CAO in comparison with a zone-arranged catalyst system no matter whether Pd-K/MgAlO or Pd/MgAlO was in the front. The coupling also worked in the presence of H2O and CO2 despite that the efficiency were spoiled. This strategy is ease to be implemented and thereby is potential for the practical after-treatment technology for lean-burn and diesel engines. (C) 2014 Elsevier B.V. All rights reserved. |
| 学科主题 | Chemistry ; Engineering |
| ISSN号 | 0920-5861 |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/23519]  |
| 专题 | 会议专题 会议专题_会议论文 |
| 推荐引用方式 GB/T 7714 | Chen, Hui,Zhang, Yexin,Xin, Ying,et al. Enhanced NOx conversion by coupling NOx storage-reduction with CO adsorption-oxidation over the combined Pd-K/MgAlO and Pd/MgAlO catalysts[C]. 见:. AUG 24-27, 2014. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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