| 초록 |
To investigate calcination effects of potassium-based sorbents using ZrO2 or TiO2 as a support, the sorbents were prepared by calcining at various temperatures from 300 °C to 700 °C under N2 or air. The CO2 capture capacity of the potassium-based TiO2 sorbent depended on the calcination temperature and atmosphere, resulting from the formation of inactive K-Ti alloy structures, such as K2Ti2O5, K2Ti6O13 and K2Ti4O9, during calcination at temperatures over 500 °C. On the other hands, the potassium-based ZrO2 sorbents (KZrI30) showed excellent CO2 capture capacity regardless of the calcination temperature and atmosphere. This result is because the KZrI30 sorbents show separated K2CO3 and ZrO2 phases without any new structures throughout the calcination of the sorbent at high temperatures over 500 °C under N2 or air. |
