CO₂ absorption characteristics of a blanket candidate material Li₂TiO₃ under exposure to different gas mixture

Highlights: • CO₂ absorption characteristics of Li₂TiO₃ with various density are investigated. • The XRD analysis decides crystallographic structure of a sintered sample. • The NRBS analysis evaluates the amount of CO₂ absorption quantitatively. • Amount of CO₂ absorbed by low-density Li₂TiO₃ increases with increasing humidity. • High-density samples sintered above 1470 K absorb little CO₂ under high humidity. - Abstract: In order to investigate the CO₂ absorption characteristics of the low- and high-density Li₂TiO₃ samples, X-ray diffraction (XRD) and non-Rutherford backscattering spectroscopy (NRBS) analyses have been performed. Crystallographic structure of a sintered sample is decided by the XRD analysis, and the NRBS analysis has evaluated the amount of CO₂ absorption quantitatively. The amount of CO₂ absorption of the low-density Li₂TiO₃ samples is increased with increase of the humidity. We find that the humidity has effect on CO₂ absorption to the low-density Li₂TiO₃ samples. On the other hand, the high-density samples sintered at temperatures higher than 1,470 K absorb very little CO₂ under high humidity conditions.