氮氧化物(NO_x)是烟气中的主要污染性气体之一,脱除NO_x已经刻不容缓。本文综述了近年来烟气中NO_x的脱除方法,分析了以钒基催化剂、铁基催化剂、分子筛催化剂为代表的高温脱硝催化剂,讨论了以贵金属催化剂、锰基催化剂、碳基催化剂为代表的低温脱硝催化剂,阐述了不同温度下选择性催化还原(SCR)脱硝催化剂的反应机理,展望了脱硝领域的发展前景。 Nitrogen oxide (NO_x) is one of the main pollutants in flue gas. It is urgent to remove NO_x. In this paper, the removal methods of NO x in flue gas are summarized in this paper. The high temperature denitration catalysts represented by vanadium-based catalysts, iron-based catalysts and molecular sieve catalysts are analyzed. The effects of noble metal catalysts, manganese-based catalysts and carbon- The low temperature denitration catalyst is described, and the reaction mechanism of the selective catalytic reduction (SCR) denitration catalyst at different temperatures is expounded, and the development prospects in the denitration field are prospected.