High specific surface area honeycomb type denitration catalyst and preparation method thereof

Abstract

The invention provides a high specific surface area honeycomb type denitration catalyst which comprises 70%-75% of titanium silicon tungsten powder, 0.2%-0.4% of vanadium, 3%-5% of ceiba, 5.5%-7.5% of glass fiber, 6%-7% of ammonia water, 10%-11% of deionized water and 0.4%-0.6% of glue; the raw materials are prepared according to the percentage and mixed into a slurry, and the catalyst is manufactured through die whole extrusion forming. The invention further provides a preparation method of the catalyst, and the method comprises slurry mixing, mixed gluing, discharging pre-extrusion, extrusion drying, calcination cutting and assembly forming. According to the high specific surface area honeycomb type denitration catalyst, formulation design can be performed according to actual fume conditions, the specificity is high, and the adaptability is wide; the catalyst is prepared through a high temperature calcination process, and the resistance to instantaneous high boiler temperature is excellent; the catalyst at a fume inlet is soaked with a curing agent so that the end surface intensity is improved, the wear resistance is high, and the mechanical life is long; superfine TiO2 is used as a substrate so that the activity is high; poison resistance is excellent by the aid of the special formulation design; the application range is wide, and the reliability is high.

Description

technical field [0001] The invention relates to a denitration catalyst and a preparation method thereof. Background technique [0002] Nitrogen oxides (NO x ) is one of the pollutants that are very harmful and difficult to deal with during the combustion process. x Emission standard raised to ≤100mg / Nm 3 . For the pollutant emission of coal-fired power generation, my country has issued environmental protection regulations, and the NO x Sewage discharge fees have been levied for the discharge of pollutants. The most efficient and economical method for removing nitrogen oxides is the selective catalytic reduction technology. In the presence of a denitrification catalyst, NH 3 react with NO to form N 2 and H 2 O. The denitration catalyst is made of vanadium as the active component and titanium dioxide as the base material to decompose the nitrogen oxides emitted by thermal power plants. The SCR catalyst is installed in the reactor, and the flue gas passes through the c...

AI Technical Summary

Problems solved by technology

However, although the catalysts commonly used to remove nitrogen oxides can remove some nitrogen oxides to a certain extent, they have disadvantages such as low catalytic efficiency, large catalyst consumption, and high cost.