Method for increasing loading capacity of honeycomb catalyst support and preparation of denitrification catalyst based on catalyst support

A method for increasing a loading capacity of a clay-based honeycomb catalyst support, the method comprising the following steps:

• (1) mixing a structuring agent and additives with a main material which is a natural silica-aluminum mineral to obtain a homogeneous powder;
• adding wet materials, and performing kneading, mud pugging, aging, extrusion molding, and pre-drying to obtain a clay-based honeycomb monolithic denitrification catalyst support,
• wherein the structuring agent is a water-soluble polymer fiber bundle,
• the additives comprise an organic binder, an extrusion aid, a pore-forming agent and a structure enhancer, and the wet materials comprise an inorganic binder, an organic acid, an inorganic acid, a humectant and water;
• (2) immersing the clay-based honeycomb monolithic denitrification catalyst support in an alkali solution for etching treatment:
• the alkali solution has a pH of 8 to 13 and a temperature of 20° C. to 90° C., and the immersion time ranges from 2 h to 4 h;
• (3) then, performing structuring water dissolution treatment on the clay-based honeycomb monolithic denitrification catalyst support:
• immersing the clay-based honeycomb monolithic denitrification catalyst support in water with a temperature of 20° C. to 90° C. for 0.5 h to 2.0 h, and then rinsing with water with a temperature of 20° C. to 90° C. twice or three times;
• and
• (4) drying and calcining the clay-based honeycomb monolithic denitrification catalyst support to obtain the structured clay-based honeycomb catalyst support.