SCR catalyst (selective catalytic reduction) denitration technology means that in the presence of a catalyst, the reducing agent (anhydrous ammonia, ammonia or urea) reacts with the NOx in the flue gas to generate harmless nitrogen and water, thereby removing the NOx. From the perspective of application areas, its uses include cement kilns, glass, garbage incineration, coal-fired power generation, and biomass power generation. With the development of the industry and the advancement of flue gas denitration related technologies, the demand for SCR denitration catalysts will further expand.