CO 2 Capture, Utilization, and Storage using Amino Acids

Abstract The capture, utilization, and storage of CO 2 are the primary options to minimize the adverse effects of global warming and related climate change resulting from increased anthropogenic CO 2 emissions. In recent years, amino acids and amino acid‐based ionic liquids (AAILs) are proposed as promising alternatives to the traditional aqueous amine solvent‐based CO 2 capture technology due to the presence of the ─NH 2 group and a CO 2 adsorption mechanism like amines, but with many additional advantages. Besides CO 2 absorption in solvent form, amino acids/AAILs‐functionalized porous sorbents demonstrate potential in CO 2 adsorption technology, a promising alternative to solvent‐based CO 2 absorption technology, as they can avoid the huge energy penalty associated with aqueous solution regeneration by heating. Additionally, amino acids/AAILs, with their CO 2 capture abilities, have demonstrated their potential in other promising CO 2 sequestration technologies: direct air capture, CO 2 mineralization using alkaline industrial waste, and conversion of CO 2 into value‐added products. This article reviews the mechanism, comparative performance, and prospects of amino acid‐based state‐of‐the‐art technologies for CO 2 absorption and adsorption, direct air capture, bio‐mineralization, and conversion of CO 2 into value‐added products, which is helpful for the further development of amino acid‐based CO 2 sequestration technologies.