Development and Analysis of Absorption Behavior of CO2 Solid Sorbent Impregnated with Amine and Ionic Liquid

CO2 solid sorbent is a porous carrier impregnated with an amine with excellent CO2 absorption and is expected to have a low energy consumption compared to the chemical absorption method. However, the amine volatilizes, and the absorption capacity decreases with the repetition of the absorption-dissipation operation. In this study, an ionic liquid was added to suppress the deterioration of performance due to the volatilization of amine. The 9 : 1 mixing ratio of amine and ionic liquid showed the lowest deterioration and high absorption capacity. The amine support ratio was also investigated, and the absorption amount of CO2 was maximized at the support ratio of 36%. The absorption behavior of CO2 in the developed solid sorbent was explained using the shrinking core model and the volumetric reaction model.