SCR denitration catalyst mainly refers to the catalyst used in powder plants system; the chemical which is prompting substance selectively reducing with nitrogen oxides in the flue gas at a certain temperature in the SCR reaction. The main raw materials of SCR denitration catalyst including precious metals and metal oxides, in which the primary precious metals Pt, Pd, Rh and Ag are being as the catalyst; therefore, the metal oxides are V₂O₅, WO₃, MgO and NiO ect.. Among them, WO₃ takes the role of anti-oxidation, anti-drug. With the in-depth study of the SCR denitration catalyst, precious metal is replaced soon by metal oxide catalyst, because of its high cost. Today, V₂O₅/TiO₂, V₂O₅-WO₃/TiO₂ or V₂O₅-WO₃/TiO₂which have high catalytic activity, are widely used in traditional SCR denitration apparatus.

 

According to the different raw materials, SCR denitration catalyst can be divided into platinum, titanium, V and hybrid series. Platinum catalysts, being the first catalyst put into use, is eliminated because of its high cost and harsh require in ash. 

 

SCR denitration catalyst mostly with active ingredient covering at the surface, wherein vanadium (V) takes the main component of active ingredient, WO₃ is being as the auxiliary component. The SCR denitration catalyst is made by taking the glass fiber and titanium dioxide as carriers, molding by cutting, assembling and calcination, then mixing carrier active ingredients well by rolling-sided method. Currently, there are three mainstream denitration catalyst structures in the market, respectively cellular, plate and corrugated board.