Preparation for Ammonia Selective Catalytic Reduction of Honeycomb Denitration Catalyst

We propose a honeycomb ammonia selective catalytic reductive SCR catalyst preparation method with simple process, high strength, and denitrification activity, continued for a long time in this paper. The catalyst  uses Ti0₂ as carrier, V₂0₅ as active component, W0₃  as co-catalyst. In which Ti0₂ anatase is used to be the raw materials of carrier, 80% content of the catalyst weight; V₂0₅ is added in the form of ammonium metavanadate, 0.1%-5% of the catalyst weight percent content; co-catalyst as W0₃ added in the form of ammonium paratungstate, 1%-20% of the catalyst weight percent content.

Steps are as follows:
1. Preparation of carrier stock
Take Ti0₂ powder, stirring in the water bath at the temperature of 60~80℃, get support slurry;
2. Join the loaded active component and other additives
Slowly add ammonium metavanadate and ammonium paratungstate into the carrier stock during the mixing process, and then add a variety of additives;
3. Mixing in the pug mill and being stale
Transfer the slurry obtained in step 2 to vacuum refining mud machine mixing, and stale in the constant humidity, continue to kneading. Pug kneaded for half an hour each time, the stale time is 8 hours, repeated several times to generate mud practiced;
4. Molding. Shaped the mud in the honeycomb;
5. Drying and roasting the catalyst
Dry the honeycomb for 3~6 days in drying box which the humidity and drying speed is controllable; and then roasted in the furnace of 300~600℃ for 12~24 hours, then to obtain the final honeycomb catalyst.