A method for improving the loading capacity of a honeycomb catalyst carrier and preparation of a denitration catalyst based on the catalyst carrier

Abstract

The application discloses a method for improving the loading capacity of a honeycomb catalyst carrier and preparation of a denitration catalyst based on the catalyst carrier. First, the honeycomb catalyst carrier is prepared from natural silicon-aluminum minerals, a water-soluble polymer filamentous fiber is selected as a structure manufacturing agent, pretreatment is performed through two procedures of alkali liquid etching and structural water dissolving to obtain a clay-based honeycomb catalyst carrier; then, the catalyst carrier is completely immersed in a molecular sieve-based coating slurry, impregnation coating is performed twice, and a high-loading molecular sieve-based coated honeycomb monolithic denitration catalyst is obtained after calcination treatment. Through the structural adjustment of the honeycomb catalyst carrier, the inner wall channel is effectively widened, so that the contact time and contact area of the molecular sieve-based coating slurry are increased during the subsequent preparation of the denitration catalyst, the slurry adhesion problem is overcome, the hole blocking phenomenon and the slurry hanging phenomenon are reduced, and then the slurry loading rate of the catalyst is improved, and the catalytic activity is improved.

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