Spherical denitration catalyst with lattice structure prepared by 3D printing and preparation method thereof

Abstract

The invention relates to the technical field of denitration catalysts, and particularly discloses a spherical denitration catalyst with a lattice structure prepared by 3D printing and a preparation method of the spherical denitration catalyst. The preparation method comprises the following steps: designing a 3D printing model and 3D printing parameters; and feeding a powder material into a printing platform of 3D printing equipment for layering, spraying a binder to bond the powder material to form a two-dimensional sheet, printing layer by layer to obtain a blank, and carrying out drying, andcalcining to obtain the spherical denitration catalyst with the lattice structure. The spherical denitration catalyst with the lattice structure prepared by 3D printing provided by the invention is aporous spherical denitration catalyst with a space lattice structure inside, the pore density is high, the specific surface area is large, the porosity is high, the internal irregular columnar structure can effectively prevent flue gas from smoothly passing, the contact probability of the catalyst and the flue gas is increased, the effective utilization rate of the catalyst is high, and the fluegas denitration effect is enhanced.

Description

technical field [0001] The invention relates to the technical field of denitration catalysts, in particular to a spherical denitration catalyst with a lattice structure prepared by 3D printing and a preparation method thereof. Background technique [0002] The denitrification catalyst is mainly used for flue gas denitrification in coal-fired power stations, steel and cement industries. Selective catalytic reduction (SCR) process, as the mainstream flue gas denitrification technology, has been widely used at home and abroad. At present, there are mainly three types of catalysts used for SCR denitrification at home and abroad: honeycomb type, flat plate type and corrugated type. Among them, compared with other forms of catalysts, honeycomb catalysts have the characteristics of high porosity, low pressure drop, large specific surface area, high activity and long life, and their market share accounts for more than 60%. However, the molding of honeycomb denitrification catalyst...

AI Technical Summary

Problems solved by technology

However, the molding of honeycomb denitrification catalyst is a key link in its preparation process. Due to the limitation of extruder manufacturing technology, mold manufacturing precision and raw material manufacturing level, the non-honeycomb structure is far from reaching the surface area of ​​high-end honeycomb denitrification catalyst. , porosity, etc.

[0003] Although in the prior art there have been related reports on the preparation of SCR denitration catalysts by photocuring 3D printing technology and the preparation of honeycomb denitration catalysts by 3D printing molding, the obtained catalyst layer can be improved to a certain extent, but the same as the traditional process, it still needs preliminary preparation. Mixing process, the process flow is still long, and the investment cost of equipment is high

In addition, the honeycomb catalyst prepared by 3D printing is formed by stacking material lines layer by layer. Although the interior of the catalyst is honeycomb, the overall specific surface area and porosity of the honeycomb catalyst still need to be further improved to increase the catalyst’s performance. The effective utilization rate, and the honeycomb shape has a poor blocking effect on the flue gas, so that the effective contact time between the flue gas and the catalyst is short, and the denitrification effect needs to be further improved

Images