MnOx-基催化剂低温NH3-SCR脱硝研究进展

Research Progress of Low-temperature NH 3-SCR of Denitration for MnOx-based Catalysts

锰氧化物(MnOx)基催化剂在氨选择性催化还原(NH3-SCR)脱除氮氧化物(NOx)的反应中具有高的低温催化活性。然而,目前,缺乏从分子原子水平认知控制MnOx基催化剂低温活性的关键机制,进而难以采用可控策略实现NOx在更宽的温度窗口和更低温度的高效催化转化。本文基于最新的研究进展,综述了催化剂制备方法、催化剂载体、异质杂原子掺杂以及催化剂形貌等因素对MnOx基催化剂NH3-SCR脱硝性能的影响,深入认识了MnOx基催化剂脱硝的作用机理,简要介绍了该催化剂的抗硫抗水机理,并对MnOx基催化剂低温NH3-SCR脱硝反应的未来发展进行了展望。

Manganese oxide(MNOx) based catalysts has an excellent performance in the removal of nitrogen oxides( NOx) by selective catalytic reduction with ammonia( NH3-SCR) at low temperature. However,at present,there was a lack of effective understanding of the key factors controlling the low-temperature activity of the catalyst at the molecular and atomic level. Thus,it was difficult to adopt a controllable strategy to achieve efficient catalytic conversion of NOxat a wider temperature window and a lower temperature. Based on the latest research progress,this paper reviewed the influence of factors such as catalyst preparation method,catalyst carrier,hetero-heteroatom doping,and catalyst morphology on the denitration performance of MNOx-based catalyst NH3-SCR,and then deeply revealed the mechanism of denitration of MNOx-based catalyst as well as briefly introduced the catalyst's sulfur and water resistance mechanism. In addition,the future development of low-temperature NH3-SCR denitration reaction of MNOx-based catalysts was prospected.