Research progress in Fe-based molecular sieve NH3-SCR denitration catalyst
In recent years,nitrogen oxides(NOx)have become a major source of environmental pollution in the atmosphere.It is found that the denitration efficiency of selective catalytic reduction(SCR)technology can reach over 90％,especially the NH3-SCR technology with NH3 as the reducing agent,which is currently the most effective and widely used denitration technology.In this review,the research progress of Fe-based molecular sieve denitration catalysts in NH3-SCR reaction was reviewed,and their research overview,preparation methods and activity and stability strengthening strategies were summarized.The common Fe-based molecular sieve catalysts such as Fe-ZSM-5,Fe-Beta and Fe-CHA used in NH3-SCR reaction were introduced in detail.The NH3-SCR activity,hydrothermal stability,and anti-poisoning performance of Fe-based molecular sieve catalysts were improved by strengthening strategies for synthesizing different topological structures of Fe-based molecular sieve catalysts,introducing different types of metals into Fe-based molecular sieve catalysts and constructing core-shell structures.Finally,the future development directions of Fe-based molecular sieve NH3-SCR catalysts in terms of denitration efficiency and anti-poisoning performance,as well as industrial applications,were prospected.
万方数据
