Ammonium metatungstate is used as the active component in the preparation of honeycomb ceramic catalyst. And the prepared high specific surface area porous honeycomb ceramic catalyst is particularly suitable for soot purification in thermal power plants, glass plants, chemical plants and other fields.
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A Method for Preparing High Specific Surface Area Porous Honeycomb Ceramic Catalyst
Using titanium dioxide, montmorillonite and α alumina as the carrier, ammonium metatungstate, ammonium metavanadate, cerium nitrate and palladium acetate as active components, accompanied by auxiliary materials, they are mixed, aged, kneaded, shaped, dried and calcined. Wherein, the auxiliary materials include monoethanolamine, ammonia water, lactic acid, stearic acid, glass fiber, polymer fiber, hydroxypropyl methyl cellulose, polyethylene oxide, citric acid and water.
Advantages of this preparation method: The catalyst carrier is optimized - montmorillonite and α alumina are used to replace part of titanium dioxide - montmorillonite plays a reinforcing role, and α alumina plays a strong role in thermal stability, thus make the catalyst adapt to application conditions such as frequent temperature changes, high nitrogen oxide concentration, high thermal stability, and high specific surface area. It replaces wood pulp with polymer fibers so that abrasive tools are not easy to block during production process, thereby improving production efficiency.
