Absorbent for Capturing Carbon Dioxide

Abstract

An absorbent for capturing carbon dioxide and, more specifically, to an absorbent for capturing carbon dioxide, includes: a liquid amine-based compound; a solid amine-based compound; and water, wherein the liquid amine-based compound includes monoethanolamine and methyldiethanolamine, and the solid amine-based compound is piperazine. The absorbent has an excellent absorption rate and cyclic capacity as a result of the composition ratio having concentrations of piperazine and methyldiethanolamine within a predetermined range, and at the same time, the crystal formation of a fresh absorbent in room-temperature and low-temperature environments is prevented, and the absorbent facilitates gas-liquid exchange in an absorption part and a regeneration part due to the reduced viscosity thereof.

Dependencies are inferred from the claim text.