| 초록 |
Solid adsorbents such as amine-included materials and zeolites have been widely investigated for post-combustion CO2 capture. Amine-included porous materials have shown promising CO2 uptake in a wet flue gas, but suffer from amine deactivation due to urea formation under a desorption condition (e.g., desorption under pure CO2 at the temperature higher than 130 °C) of temperature swing adsorption (TSA) cycles. In contrast, purely inorganic zeolites are thermochemically stable but do not adsorb CO2 from a wet flue gas because of the preferential H2O adsorption. In the present work, we synthesized an amine-grafted Y zeolite, which can synergistically combine the strengths of both adsorbent systems. The amine groups can effectively capture CO2 in a wet flue gas, while the strongly co-adsorbed H2O within the hydrophilic zeolite micropores suppresses urea formation. Because the adsorbent is prepared from a commercially available zeolite, it is also cost efficient and suitable for mass production. |
