催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (1): 17-26.DOI: 10.3724/SP.J.1088.2011.00904

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Pt-BaO 催化剂的 NOx 储存-还原化学及结构-性能关系

胡准, 孙科强, 徐柏庆   

  1. 清华大学化学系有机光电子与分子工程教育部重点实验室, 分子催化与定向转化研究室, 北京 100084
  • 收稿日期:2010-09-09 修回日期:2010-10-19 出版日期:2011-01-13 发布日期:2014-05-22

NOx Storage-Reduction Catalysis and Structure-Performance Relationship of Pt-BaO Catalyst

HU Zhun, SUN Keqiang*, XU Boqing   

  1. Innovative Catalysis Program, Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
  • Received:2010-09-09 Revised:2010-10-19 Online:2011-01-13 Published:2014-05-22

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摘要： NOx 储存-还原 (NSR) 技术是目前稀燃汽车尾气中 NOx 消除的最有前景的催化技术之一. NSR 催化过程中稀燃/富燃条件的交替运行、NSR 催化剂上化学计量反应与催化反应的耦合赋予了 NSR 催化过程迥异于常规连续流动气固相催化反应的特点. 本文首先介绍了目前人们对 Pt-BaO 催化剂上 NSR 基本化学过程的认识; 在此基础上, 结合本研究组在低 Pt 载量抗烧结 Pt-BaO 催化剂方面的研究结果, 分别评述了 Pt, BaO 及载体 (助剂) 的性质对催化剂性能的影响, 并对现存的问题及未来的研究方向加以归纳和展望.

关键词: 氮氧化物储存-还原, 稀燃氮氧化物消除, 铂-氧化钡催化剂, 低铂含量, 抗烧结

Abstract: NOx storage-reduction (NSR) is one of the most promising techniques for lean NOx abatement. The periodical lean/rich conditions and the combination of the stoichiometric reaction and the catalytic reaction on NSR catalyst distinguish the NSR catalysis from conventional continuous gas-solid catalytic process. This paper summarized the knowledge and understanding of the NSR catalysis on supported Pt-BaO catalyst. The fundamental chemical processes over the NSR catalysts were discussed first, followed by the role of Pt, BaO and support material. Problems and prospects in the study of NSR catalysts were presented.

Key words: NOx storage-reduction, lean NOx abatement, Pt-BaO catalyst, low platinum catalyst, anti-sintering