CO2 absorbent with mesoporous material as support body and preparation method of CO2 absorbent

The invention relates to the technical field of carbon dioxide trapping, in particular to a CO2 absorbent with a mesoporous material as a support and a preparation method of the CO2 absorbent. The preparation method comprises the following steps: by taking a surfactant, water, concentrated hydrochloric acid, n-butyl alcohol and tetraethoxysilane as raw materials, synthesizing mesoporous silica through a hydrothermal synthesis method; the method comprises the following steps: physically mixing a mesoporous material with a metal oxide precursor, and granulating by an extrusion-rolling method to obtain CO2 absorbent particles. And drying the particles, and calcining at 520-850 DEG C to obtain the CO2 absorbent with the mesoporous material as the support. The mesoporous material is used as a supporting body, the specific surface area of the absorbent is greatly increased, and meanwhile, the mesoporous material has ordered pore channels, so that diffusion of CO2 is facilitated; the mesoporous material has a good d