doi:10.16597/j.cnki.issn.1002 - 154x.2025.04.008
基于NH3选择性催化还原NO的锰基催化剂的研究进展
张梓楠1 梁承雷1 马 寒1 樊少璞2 冯 巧1 张延兵1* 黄金鹤1
孙 华1 任海波1 轩子怡1
(1. 河南城建学院 材料与化工学院，平顶山 467000；2. 平顶山东方碳素有限公司，平顶山 467000)
摘 要 固定源排放的NOx(x=1, 2)会引起诸多环境问题，用NH3选择性催化还原NOx(SCR)作为一种成熟的技术得到了商业应用，其核心是运行温度窗口介于300~400 ℃的钒基催化剂，然而这种技术难以有效处理低温(<200 ℃)尾气。锰氧化物(MnOx)有200 ℃以下的优良催化活性，研究人员通过掺杂和负载的方式改善其低温SCR活性和抗SO2性能，制备了一系列具有优异脱硝和抗SO2性能的催化剂。作者分别从非负载型和负载型锰基脱硝催化剂角度综述了脱硝催化剂的研究进展。基于MnOx的非负载型催化剂部分主要综述了催化剂形态、结晶状态对其SCR活性的影响，以及掺杂不同金属氧化物对催化剂低温SCR活性、抗SO2性能的改善。负载型锰基脱硝催化剂部分重点指出了不同载体对催化剂相关性能的影响。最后，展望了锰基催化剂未来的研究方向。
关键词 NO，SCR 抗SO2 锰基 低温
Research Progress of Mn-based Catalysts for Selective Catalytic Reduction of NO with NH3
ZHANG Zinan1 LIANG Banglei1 MA Han1 FAN Shaopu2 FENG Qiao1 ZHANG Yanbing1* HUANG Jinhe1 SUN Hua1 REN Haibo1 XUAN Ziyi1
(1. College of Materials and Chemical Engineering, Henan University of Urban Construction, Pingdingshan 467000, China; 2. Pingdingshan Oriental Carbon Co., Ltd., Pingdingshan 467000, China)
Abstract NOx(x=1, 2) originated from the stationary sources has given rise to lots of environmental issues. Selective catalytic reduction of NO with NH3(SCR), as a mature technology, has been applied in practical application. And the core of this technology is V-based catalyst with high working temperature window (300 ~ 400 ℃), which could not effectively remove the NOx from the flue gas when the temperature is below 200 ℃. Based on the excellent catalytic activity of MnOx below 200 ℃, the methods of doping and loading were used to improve the low-temperature SCR activity and SO2-tolerance of Mn-based catalysts, and many catalysts with the functions of NO elimination were prepared. Herein, the research progress of unloaded Mn-based catalysts and supported Mn-based catalysts was summarized. For unloaded Mn-based catalysts, the influences of morphology and crystallization state on SCR activity were reviewed. Moreover, the influences of doping with different metal oxides on the low-temperature SCR activity, SO2-durability over the unloaded Mn-based catalysts were investigated. In the case of supported Mn-based catalysts, the effects of different support materials on the performances were listed. Finally, the future research directions of Mn-based catalysts were presented.
Keywords NOx SCR SO2-tolerance Mn-based low temperature