Amine modified mesoporous alumina as well as preparation method and application thereof

The invention provides amine modified mesoporous alumina as well as a preparation method and application thereof, and belongs to the technical field of carbon capture. The ordered mesoporous alumina is prepared by adopting a precipitation self-assembly method, and the prepared ordered mesoporous alumina has the characteristics of ordered pore channels, high specific surface area and narrow pore size distribution, so that amine can be loaded into the pore channels of the mesoporous alumina, the CO2 adsorption site is increased, and the CO2 adsorption capacity of the material is improved; therefore, the amine modified mesoporous alumina material prepared by using the ordered mesoporous alumina as the carrier has high CO2 adsorption capacity and good regeneration cycle performance. The adsorption capacity of the amine modified mesoporous alumina adsorbent prepared by the invention on CO2 in industrial flue gas reaches up to 286.11 mg/g; the adsorbent still keeps the adsorption capacity of 90% or above after mult