Syntheses and structures of lithium zirconates for high-temperature CO2 absorption

Abstract

The sorption and further application of CO₂ is a highlight in the field of environmental protection and sustainable development. Lithium-containing zirconates (Li_xZr_yO_z) are promising materials for high-temperature chemisorption of CO₂ and have attracted tremendous interest. This review presents discussion on the recent status of Li_xZr_yO_z based CO₂ sorbents at high temperature. Special attention is focused on the solid state chemistry, synthetic strategies, high-temperature CO₂ capture–regeneration properties and possible sorption mechanisms for Li_xZr_yO_z with different Li/Zr ratios, including Li₂ZrO₃, Li₆Zr₂O₇, Li₈ZrO₆, and Li₂ZrO₃ doping with alkali metals.