The influencing factor for CO₂ absorption of Li ₂ZrO₃ at high temperature

Li₂ZrO₃ materials were synthesized under different conditions for CO₂ absorption at high temperature. The crystal structure of the Li₂ZrO₃ material was analyzed using an X-ray powder diffractometer (XRD), the surface morphologies of all the samples were observed by using scanning electron microscopy (SEM) and the CO ₂-absorption ability of the Li₂ZrO₃ material was studied using a thermogravimetric (TG) analyzer. The experimental results show that the synthesis temperature affects both the structure (Fig. 3) and the morphology (Fig. 4) of the material, and hence its CO₂ absorption ability. As a result, Li₂ZrO₃ materials synthesized at 800°C exhibit superior absorption ability; whereas Li₂ZrO ₃ materials derived under either excessively high or low synthesis temperatures show poorer absorption ability (Fig. 2). In addition, the CO ₂ concentration in the atmosphere also has influence on the CO ₂ absorption rate of the Li₂ZrO₃ material. Li₂ZrO₃ materials display better absorption abilities at higher percentage concentrations of CO₂ in the atmosphere (Fig. 5). Furthermore, the Li₂ZrO₃ material in this research, which displayed better absorption ability, was synthesized without doping any elements.