| 贫燃条件下汽车尾气中NOx催化净化研究进展 |
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| 引用本文： | 刘思宏,李生才,王亚军.贫燃条件下汽车尾气中NOx催化净化研究进展[J].安全与环境学报,2003,3(5):27-33. |
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| 作者姓名： | 刘思宏 李生才 王亚军 |
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| 作者单位： | 北京理工大学爆炸灾害预防控制国家重点实验室,北京100081 |
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| 摘 要： | 汽车尾气排放的NOx(主要是NO)是城市大气的主要污染源之一。本综述了近l0年来贫燃条件下NOx催化转化为N2的催化剂研究进展。这些方法包括HC-SCR、NO直接催化分解、NOx吸附-还原等。讨论了不同催化剂的性能影响因素。新的负载材料MFI、MCM-41、SAPO-34的应用增强了催化剂的性能。双功能催化剂由于两种活性位的协同作用表现出较高的活性和选择性。新的纳米结构概念催化剂NOx吸附还原中发现有广泛应用。介绍了上述催化脱除NOx的各种机理并指出了今后研究的方向。
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| 关 键 词： | 环境工程 汽车尾气NOx脱除 催化剂 选择性还原 NO分解 NOx吸附还原 贫燃条件 |
| 文章编号： | 1009-6094(2003)05-0027-07 |
| 修稿时间： | 2003年6月15日 |
RECENT PROGRESS IN STUDY ON CATALYTIC REMOVAL OF AUTOMOBILE EXHAUST NOx UNDER LEAN-BURN CONDITIONS |
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| LIU Si-hong,LI Sheng-cai,WANG Ya-jun.RECENT PROGRESS IN STUDY ON CATALYTIC REMOVAL OF AUTOMOBILE EXHAUST NOx UNDER LEAN-BURN CONDITIONS[J].Journal of Safety and Environment,2003,3(5):27-33. |
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| Authors: | LIU Si-hong LI Sheng-cai WANG Ya-jun |
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| Abstract: | Automobile exhaust NOX(mainly NO) is a major atmospheric pollutant. The aim of this paper is to review the study on the selective reduction of NOx with hydrocarbons and NOx storage reduction as well as the decomposition of NO under lean-burn conditions. The effects of various parameters on catalyst performance have also been discussed. The application of new support material of MFI(or MCM-41 .SAPO-34) zeolite enhances the performance of catalysts. Bifunctional catalysts exhibit high activity and selectivity due to synergistic effect of two active sites. The concept of nanostructured catalysts was found a wide range of application in NOx storage-reduction. The reaction mechanisms of removal of NOx are introduced. The major subjects to be continually investigated are presented. |
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| Keywords: | environmental engineering automobile exhaust DeNOx catalyst HC-SCR NO decomposition NOxSR lean burn |
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