Vanadium-loaded middle-temperature SCR catalyst and preparation method thereof

The invention discloses a vanadium-loaded middle-temperature SCR catalyst. A titanium-zirconium oxide is used as a carrier, a vanadium oxide is used as an active component, and a cerium oxide is used as a catalyst promoter, wherein the mole ratio of a cerium element to a titanium element to a zirconium element in the catalyst is (0.1-0.3) to 1 to 1; the mass of vanadium oxide accounts for 1 percent of the mass of the whole catalyst. The invention also discloses a preparation method of the vanadium-loaded middle-temperature SCR catalyst. Compared with a single vanadium-based catalyst, the vanadium-loaded middle-temperature SCR catalyst disclosed by the invention has the advantages that by the adding of a proper amount of 0.2CeO2, the heat resistance of the catalyst is improved, the reducing temperature of the catalyst is reduced, the denitration efficiency is improved, and a selective catalytic reduction denitration active temperature window is expanded; an extremely good modification effect on a V2O5/TiO2-ZrO