3results about How to "Improve denitrification activity" patented technology

The invention discloses a denitration catalyst with high sulfur resistance and water resistance and a preparation method thereof, the catalyst comprises a modified carrier and active components loaded on the modified carrier, the modified carrier comprises fly ash, titanium dioxide and iron powder, and the active components comprise vanadium oxide and tungsten oxide. The iron-modified fly ash partially replaces titanium dioxide to serve as a carrier of the catalyst, vanadium and tungsten active components are loaded, the obtained denitration catalyst shows excellent sulfur resistance and water resistance, meanwhile, the catalyst further has a wide active temperature window and high nitrogen selectivity, the preparation process is simple, operation is easy, cost is low, and the catalyst is suitable for industrial production. The method has high environmental value and economic value.

The invention discloses a fiber ceramic-based catalytic filter element for denitration of industrial flue gas and a preparation method of the fiber ceramic-based catalytic filter element, and belongs to the technical field of catalytic filter elements. According to the preparation method, firstly, a chelating agent is introduced in the preparation process of TiO2 sol to improve the dispersity and particle size uniformity of TiO2 nanoparticles, the chelating agent can effectively adjust the hydrolysis rate of butyl titanate by means of the strong coordination acting force of the chelating agent and titanium ions, and high-dispersity and small-particle-size TiO2 sol is constructed; then, the fiber ceramic base material is immersed in the TiO2 sol, a firm TiO2 coating is formed after calcination, the firm TiO2 coating serves as a carrier with a high specific surface area, and the binding force between the firm TiO2 coating and the base material is enhanced; the preparation method comprises the following steps: firstly, preparing a TiO2 coating, then dipping a solution containing vanadium and tungsten precursors onto the composite carrier, and calcining to form a main active component V2O5 and a cocatalyst WO3 which are highly dispersed on the surface of the TiO2 coating to form selective catalytic reduction active sites, thereby finally obtaining the fiber ceramic-based catalytic filter element which is good in blocking resistance, water-resistant, sulfur-resistant and high-temperature-resistant and can be used for industrial flue gas denitration.