Mesoporous cellular foam impregnated with iron-substituted heteropolyacid, preparation method therefor, and carbon dioxide separation method using same

#The present disclosure relates to a carbon dioxide adsorbent, or, particularly, to a mesoporous cellular foam impregnated with an iron-substituted heteropolyacid, where the mesoporous cellular foam is a solid adsorbent that shows a different adsorption amount of carbon dioxide according to a temperature change, and a method of separating carbon dioxide using the mesoporous cellular foam.

#Carbon dioxide capture and storage (CCS) is a technology that prevents isolating a massive amount of carbon dioxide discharged from sources such as power plants, steel plants, or cement plants using fossil fuels.

#Among the CCS technologies, the carbon dioxide capture technique is a core technique that occupies about 70% to about 80% of the total cost, which is mainly classified into a postcombustion technology, a pre-combustion technology, and an oxy-fuel combustion technology (Current Status of Development in Carbon Dioxide Capturing Technology, LEE, Chang Geun, Prospect of Industrial Chemistry, Vol. 12, No. 1, 2009).

#FIG. 1 illustrates a process of an iron-substituted heteropolyacid being impregnated into a mesoporous cellular foam support;

#FIG. 2 is a graph of 50 wt % Fe-HPA-MCFs showing carbon dioxide adsorption at 25° C., 50° C., and 75° C. and carbon dioxide adsorption and desorption at 110° C.;

#FIG. 3 is a graph of 70 wt % Fe-HPA-MCFs showing carbon dioxide adsorption at 25° C., 50° C., and 75° C. and carbon dioxide adsorption and desorption at 110° C.;

#Hereinafter, the inventive concept will be described in detail by explaining embodiments of the inventive concept with reference to the attached drawings. In the description of the embodiments, certain detailed explanations of related art are omitted when it is deemed that they may unnecessarily obscure the essence of the invention.

#According to an embodiment of the present invention, a mesoporous cellular foam with large pores is impregnated with an iron-substituted heteropolyacid that has a chemical absorptivity with respect to carbon dioxide so that the two materials compensate adsorbing abilities to maximize carbon dioxide adsorbing ability.

#FIG. 1 illustrates a process of an iron-substituted heteropolyacid (hereinafter, also referred to as “Fe-HPA”) being impregnated into a mesoporous cellular foam (hereinafter, also referred to as “MCF”) support, and thus provides an iron-substituted heteropolyacid impregnated mesoporous cellular foam (hereinafter, also referred to as “Fe-HPA-MCF”). The process will be described as follows.