Evidence of CO2 Chemisorption at High Temperature in Lithium Gallate (Li5GaO4)

Abstract Li5GaO4 was tested as a possible CO2 captor. Li5GaO4 was synthesized by solid-state reaction, structurally characterized, and then thermally treated under a CO2 flow, from 30 to 900 °C, having the highest CO2 chemisorption at around 709 °C. The results clearly showed that Li5GaO4 is able to trap CO2 chemically in two different steps. The CO2 quantity trapped was equal to 8.9 mmol g−1, which is considerably high in comparison to other ceramics.