过渡金属基MOF材料在选择性催化还原氮氧化物中的应用

Application of Transition Metal Based MOF Materials in Selective Catalytic Reduction of Nitrogen Oxides

选择性催化还原(SCR)技术是目前应用最广泛的工业脱硝技术,研发具有优良活性和抗毒化性能的催化剂体系是研究学者关注的重点。过渡金属氧化物和金属有机骨架(MOF)材料因其优良的氧化还原性能在脱硝领域受到了广泛关注和研究,且研究学者发现将过渡金属氧化物与MOF材料结合能够进一步提高催化剂的脱硝活性。本文综述了近年来主要应用于NH3-SCR反应的系列单过渡金属基MOF脱硝催化剂和复合过渡金属基MOF脱硝催化剂的研究进展,阐述了过渡金属基MOF脱硝催化剂抗水抗硫中毒性能和热稳定性的强化方法,并展望了未来过渡金属基MOF脱硝催化剂的主要研究方向:综合利用不同过渡金属氧化物的特点并结合金属氧化物间的强相互作用,制备得到具有优良脱硝活性、抗水抗硫性能和热稳定性的新型过渡金属基MOF脱硝催化剂,进一步通过实验和仿真模拟相结合制备高效过渡金属基MOF脱硝催化剂以满足工业化需求。

Selective catalytic reduction(SCR)technology is the most widely used industrial denitration technology at present,the development of catalyst system with excellent activity and anti-poisoning performance is the focus of researchers.Transition metal oxides and metal organic framework(MOF)materials have been widely studied and applied in the field of denitration catalysts because of their excellent redox performance,and researchers found that the combination of transition metal oxides and MOF materials can further improve the denitration activity of the catalyst.This paper summarizes the research progress of a series of single transition metal based MOF denitration catalysts and composite transition metal based MOF denitration catalysts mainly used in NH3-SCR reaction in recent years,and expounds the strengthening methods of water resistance,sulfur poisoning resistance and thermal stability of transition metal based MOF denitration catalysts,The main research directions of transition metal based MOF denitration catalysts in the future are prospected:new transition metal based MOF denitration catalysts with excellent denitration activity,water and sulfur resistance and thermal stability can be prepared by comprehensively utilizing the characteristics of different transition metal oxides and combined with the strong interaction between metal oxides.Further,transition metal based MOF denitration catalyst can be prepared by combining experiment and simulation to selectively catalyze the reduction of nitrogen oxides to meet the needs of industrialization.