论文部分内容阅读
NOx储存-还原(NSR)技术是最有前景的稀燃氮氧化物消除技术,自从日本丰田公司1996年首次提出NOx储存-还原这一概念后,一直受到研究者的广泛关注。本文综述了近十余年来NSR催化剂(PBA型、水滑石型、钙钛矿型)的研究进展,重点概述了目前比较公认的NOx储存-还原的反应路径,以及NSR催化剂的失活机制,包括H2O和CO2的负面影响,热失活和硫中毒问题,最后展望了NOx储存还原技术未来的发展趋势。
NOx storage-reduction (NSR) technology is the most promising technology for the elimination of lean NOx, and has been attracting the attention of researchers for many years since it was first proposed by Japan’s Toyota in 1996 for the concept of NOx storage-reduction. This review summarizes the research progress of NSR catalysts (PBA type, hydrotalcite type and perovskite type) in the recent ten years and highlights the currently accepted NOx storage-reduction reaction pathway and the deactivation mechanism of NSR catalysts. Including the negative effects of H2O and CO2, heat deactivation and sulfur poisoning. Finally, the future development trend of NOx storage reduction technology is forecasted.