As an initial stage of the creation of a new solid material for carbon dioxide capture and storage (CCS), the behaviors of CO
2 absorption and desorption were investigated in terms of Li
2O–TiO
2 compounds. The Li
4TiO
4 specimen began to absorb CO
2 at 250°C with the formation of Li
2TiO
3 and Li
2CO
3 phases. The absorption rate was significantly enhanced at 710°C by the formation of the Li
2CO
3-based liquid phase. Decomposition of Li
2CO
3 was observed above 960°C in CO
2 atmosphere and above 900°C in Ar-10%CO
2 atmosphere. In the formation of solid Li
2CO
3 after Li
4TiO
4/CO
2 reaction below 700°C, the reaction rate of CO
2 absorption increased with the decreasing diameter of Li
4TiO
4 particles. The area ratio of the Li
4TiO
4 phase decreased and that of the Li
2TiO
3 phase increased in the Li
4TiO
4 sample after repeating the reaction path of CO
2 absorption and desorption.
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