(189b) Robust Nanocomposite Sorbents for High Efficiency CO2 Capture

Robust composite sorbents for high efficiency CO2 capture have been developed based on specially designed mesoporous silica impregnated with polyethylenimine (PEI). The newly synthesized CO2 composite sorbents exhibit extraordinary capture capacity up to 7.9 mmol of CO2 /g of sorbent under simulated flue gas conditions (pre-humidified 10% CO2). The initial CO2 capture kinetics were found to be fast and reached 90% of the total capacities within few minutes. Other than the high capacity and fast sorption kinetics, the sorbents also showed full reversibility and good stability during cyclic adsorption-regeneration tests. The new sorbents reported here offer many advantages over the amine scrubbing technique and show promise as a potential candidate for alternative CO2 capture technologies.