Method for preparing novel denitration catalyst

Abstract

The invention discloses a method for preparing a novel denitration catalyst. The method comprises the steps of: mixing 10-40wt% of attapulgite, 0.5-15wt% of bentonite, 10-35wt% of alumina powder, 40-70wt% of 4A molecular sieve, 0.5-10wt% of kieselguhr and 0.5-10wt% of assistant into powder; molding in water mediating and extruding manners and firing a carrier by a high-temperature flame; feeding ammonium metavanadate and metatungstic acid into hot water of which the temperature is not less than 85 DEG C; mixing an ethanol solution with an acid solution to form a mixing solution; adding titanate which is 5-30% of total weight of the mixing solution to the mixing solution, soaking the carrier in steeping liquor; and baking the dried carrier and preparing into the denitration catalyst. The carrier is prepared from a cheap material instead of an expensive titanium dioxide material through reasonable prescription combination; good and stable mechanical strength, 30-70% of water absorption and 20-80 m<2> / g of specific surface area of the catalyst carrier can be ensured by changing the material of the carrier; and the preparation cost can be reduced by 20-50% under the condition of keeping the catalytic effect.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a denitrification catalyst. Background technique [0002] While enjoying the huge achievements brought about by the rapid development of industry, we are also deeply hurt by environmental pollution. In response to the serious challenge of environmental pollution, most countries in the world have taken relevant measures to improve the environment. my country's Twelfth Five-Year Plan has also clearly issued energy-saving and emission-reduction goals, and stricter control over industrial exhaust gas, especially toxic gases. It clearly stipulates that high-emission and high-polluting enterprises such as steel plants, coal power plants, and cement plants must bear responsibility for environmental pollution. Responsibility for pollution and duty to improve the environment. [0003] Iron and steel, thermal power generation, cement and other industries emit...

AI Technical Summary

Problems solved by technology

[0005] Although the catalysts currently on the market have good denitrification effects, the problem is that the manufacture of this product requires a large amount of high-quality titanium dioxide materials, vanadium compounds and tungsten compounds. At present, most of the mainstream processes in the world use ammonium metavanadate and metatungstic acid. Ammonium is used as the source material of vanadium pentoxide (vanadium) and tungsten oxide (tungsten) compounds, and its usage is 1.5-2.2% and 5.5-7.5% of the total amount of titanium dioxide, and the carrier is all made of titanium dioxide. The cost of raw materials for carrier manufacturing is high, and the cost of catalyst preparation is increased.