High-performance CO2 adsorption material and preparation method thereof

The invention provides a high-performance CO2 adsorption material and a preparation method thereof. The high-performance CO2 adsorption material is prepared from M% of LixNayKzNO3/light MgO, wherein M% is the mole percentage of LixNayKzNO3 and light MgO, M is larger than 1 and smaller than 40, the sum of x, y and z is 1, and none of x, y and z is zero. The high-performance CO2 adsorption material is characterized in that three types of alkali metal nitrates including LiNO3, NaNO3 and KNO3 are evenly loaded on the surfaces of light MgO at the same time. The preparation method of the alkali metal nitrites includes the steps of dissolving a certain amount of LiNO3, NaNO3 and KNO3 in water, weighing an appropriate amount of light MgO powder to be dispersed in the aqueous solution, sufficiently and evenly stirring the mixture, and obtaining the target adsorption material after drying and specific calcining are conducted. The high-performance CO2 adsorption material has excellent CO2 adsorption performance within the temperature range of 200 DEG C to 400 DEG C. The synthesis conditions required by the preparation method are simple, the preparation cost is low, industrialized production can be easily achieved, and the high-performance CO2 adsorption material prepared through the method has important application prospects in the field of CO2 capture.