【摘要】 长久以来，柴油机排放的氮氧化物（NO_x）给人体健康和环境带来的危害已引起人们的极大关注。尾气后处理技术中的NH₃-SCR技术是有效净化柴油机尾气中NO_x的有效技术手段之一，该技术可实现对柴油机排放的NO_x的直接治理。综述了目前有关NH₃-SCR技术的反应机理，从贵金属催化剂、金属氧化物催化剂和分子筛催化剂的角度，详细论述了不同类型催化剂在催化消除NO_x方面的研究进展，并对目前NH₃-SCR催化剂在研究过程中出现的问题进行了阐述，提出了NH₃-SCR技术未来发展的相关建议。更多还原

【Abstract】 The harm of nitrogen oxides（NO_x）emitted by diesel engines to human health and the environment has aroused great concern for a long time. The NH₃-SCR exhaust gas post-treatment technology is one of the effective technical means to effectively purify NO_x from diesel engine exhaust, which can realize the direct treatment of NO_x emitted by diesel engine. In this paper, the current reaction mechanism of NH₃-SCR technology was reviewed. The research progress of different types of precious metal catalyst, metal oxide catalyst and molecular sieve catalyst in catalytic removal of NO_x were discussed in detail, and the problems in the current research process of NH₃-SCR catalyst were described. Some suggestions for the future development of NH₃-SCR technology were put forward.更多还原