Design and synthesis of stable supported-CaO sorbents for CO2 capture

Abstract

CaO sorbents for CO₂ capture are much more stable when supported on a ceramic; however, the rational design of such supported sorbents has only recently been considered. We designed and prepared new CO₂ sorbents by supporting CaO on meso- and macro/mesoporous supports made of materials that are stable under conditions relevant to CO₂ capture in pre-combustion CO₂ sorption. The resulting sorbents were used to capture and release carbon dioxide (CO₂), and one demonstrated excellent stability over 30 cycles, taking up nearly twice as much CO₂ over these thirty cycles as a related material that lacked a tailored structure.