Vehicle-use high-mesh-number extrusive-type SCR denitration catalyst and preparation method thereof

Abstract

For solving the problem of NOx removal of motor vehicle exhaust emission, the invention discloses a vehicle-use high-mesh-number extrusive-type SCR denitration catalyst and a preparation method thereof. The denitration catalyst is prepared with titanium tungsten powder as a main raw material with addition of hydroxypropyl methyl cellulose, polyoxyethylene, oleic acid, chemical fibers, [gamma]-aluminum oxide, ethylene glycol, lactic acid, a catalyst precursor solution, ethanol amine, [gamma]-aluminum oxide, silica sol, ammonium water and deionized water. The preparation method includes the steps of kneading the components, pugging the mixture, aging the mixture, performing extrusive shaping, and drying and sintering the mixture to produce the honeycomb-like extrusive-type SCR denitration catalyst. The catalyst has high catalytic activity, high mesh number and high mechanical strength.

Description

technical field

[0001] The invention relates to a catalyst, in particular to an extruded SCR denitrification catalyst used for automobile tail gas treatment and a preparation method thereof. Background technique

[0002] With the sustained and stable growth of the national economy, the development of my country's automobile industry is optimistic, and the sales of automobiles continue to grow every year. With the continuous increase of the total number of automobiles in the country, the problem of automobile exhaust pollution is becoming more and more serious. The nitrogen oxides contained in it and the nitrogen in the air The combination of water can form acid rain, and these nitrogen oxides can also react with hydrocarbons under light conditions to form photochemical smog, so the emission of nitrogen oxides is extremely harmful to the environment.

[0003] In the 1950s, the Americans proposed the SCR denitrification technology and applied for a patent. In the 1970s, the Jap...

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