First assessment of Li2O–Bi2O3 ceramic oxides for high temperature carbon dioxide capture

The capacity to capture COwas determined in several stoichiometric compositions in the LiO–BiOsystem. The compounds（LiBiO, LiBiO, LiBiOand LiBiOphases） were synthesized via solid-state reaction and characterized by X-ray diffraction, scanning electron microscopy and N2 adsorption techniques.The samples were heat-treated at temperatures from 40 to 750 °C under the COatmosphere to evaluate the carbonate formation, which is indicative of the capacity of COcapture. Moreover, LiBiOshows an excellent COcapture capacity of 7.1 mmol/g, which is considerably higher than those of other previously reported ceramics. LiBiOis able to react with COfrom 240 °C to approximately 660 °C showing a high kinetic reaction even at COpartial pressure values as low as 0.05.