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

The sorption and further application of CO2 is a highlight in the field of environmental protection and sustainable development. Lithium-containing zirconates (LixZryOz) are promising materials for high-temperature chemisorption of CO2 and have attracted tremendous interest. This review presents discussion on the recent status of LixZryOz 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 LixZryOz with different Li/Zr ratios, including Li2ZrO3, Li6Zr2O7, Li8ZrO6, and Li2ZrO3 doping with alkali metals.