Carbon-based acid anhydride synergistic transition metal denitration catalyst and preparation method thereof

Abstract

The invention discloses a carbon-based acid anhydride synergistic transition metal denitration catalyst and a preparation method thereof. A mixture which is obtained through impregnation process ultrasonic dissolving of a transition metal and acid anhydride carbon (including graphene oxide, activated carbon, carbon nanotubes and charcoal) is calcined at 300-500 DEG C in inert atmosphere for 2-4 h to obtain a composite structure. The prepared catalyst highly-efficiently catalyzes NOx pollution gases at medium and low temperatures, the catalysis mechanism of the catalyst is characterized in that the reducing agent of a reaction is carbon, loading of the transition metal introduces high-activity metal acid sites, and the metal can promote the decomposition of acid anhydride groups on the surface of carbon in order to release a lot of catalysis activity sites, so the continuous and highly-efficient proceeding of the catalysis reaction is facilitated. The catalyst realizes the combination of the acid anhydride carbon material and the transition metal, fully shows the respective advantages of the acid anhydride carbon material and the transition metal, and can highly-efficiently process the NOx pollution gas at medium and low temperatures.

Description

technical field [0001] The invention relates to a denitrification catalyst and a preparation method thereof, in particular to a method for treating polluted gas by using the prepared catalyst, in particular to a carbon-based acid anhydride synergistic transition metal denitrification catalyst and a preparation method thereof. Background technique [0002] Nitrogen oxides NOx is one of the major air pollutants recognized around the world, which mainly includes NO, N 2 O, NO 2 , N 2 o 4 , N 2 o 5 and other compounds. Nitrogen oxides not only directly affect human health, but also cause ecological and environmental problems such as photochemical smog, acid rain, greenhouse effect, and ozone layer destruction through a series of physical and chemical reactions. At present, the emission reduction of nitrogen oxides has received great attention. Since the "Twelfth Five-Year Plan" included nitrogen oxide emissions in the binding indicator system, by the end of 2015, the tota...

AI Technical Summary

Problems solved by technology

At present, the selective catalysis of vanadium-based catalysts is widely used in industry, but its high cost and high catalytic reaction temperature also limit its application to a certain extent.

[0004] Transition metal oxide catalysts are currently the most widely studied NO-SCR catalysts. While they have the advantages of medium and high temperature catalysis, they also have some defects. 3 As a typical reducing agent, it will be accompanied by NH 3 Storage, transportation and unreacted NH 3 environmental problems, etc.