Regeneration mechanisms of high-lithium content zirconates as CO2 capture sorbents: experimental measurements and theoretical investigations

Abstract

By combining TGA and XRD measurements with theoretical calculations of the capture of CO₂ by lithium-rich zirconates (Li₈ZrO₆ and Li₆Zr₂O₇), it has been demonstrated that the primary regeneration product during absorption/desorption cycling is in the form of Li₂ZrO₃. During absorption/desorption cycles, lithium-rich zirconates will be consumed and will not be regenerated. This result indicates that among known lithium zirconates, Li₂ZrO₃ is the best sorbent for CO₂ capture.