Some influencing factor for CO₂ absorption cycle-ability of lithium zirconate

With nanometer-sized monoclinic ZrO₂, lithium carbonate, and potassium carbonate as starting materials, according to Li₂CO₃ : ZrO₂ : K₂CO₃ = 1:1:0.03, potassium-doped lithium zirconate absorbents were prepared by high-temperature solid-state reaction. Their CO₂-absorption cycle-properties were measured with a thermogravimetric analyzer. The crystal structure of the re-prepared absorbents was studied by comparison of their XRD patterns. The microscopic morphologies of re-prepared absorbents were viewed by a scanning electron microscopy. The experimental results showed, after absorption of CO₂, the material could be reprepared, whose performance of absorbing CO₂ for the second time is affected by the temperature and air flux during re-preparation. When the temperature is 750°C and the air flux is 100 mL/min, the re-prepared material has good cycle ability to absorb CO₂.