Qi Genggeng author Wang Yanbing author Estevez Luis author Duan Xiaonan author Anako Nkechi author Columbia University. Earth and Environmental Engineering Park Ah-Hyung author Columbia University. Earth and Environmental Engineering Li Wen author Jones Christopher W. author Giannelis Emmanuel P. author Columbia University. Earth and Environmental Engineering originator text Articles 2011 English A novel high efficiency nanocomposite sorbent for CO2 capture has been developed based on oligomeric amine (polyethylenimine, PEI, and tetraethylenepentamine, TEPA) functionalized mesoporous silica capsules. The newly synthesized sorbents exhibit extraordinary capture capacity up to 7.9 mmol gāˆ’1 under simulated flue gas conditions (pre-humidified 10% CO2). The CO2 capture kinetics were found to be fast and reached 90% of the total capacities within the first few minutes. The effects of the mesoporous capsule features such as particle size and shell thickness on CO2 capture capacity were investigated. Larger particle size, higher interior void volume and thinner mesoporous shell thickness all improved the CO2 capacity of the sorbents. PEI impregnated sorbents showed good reversibility and stability during cyclic adsorptionā€“regeneration tests (50 cycles). Physical chemistry 4 2 444 452 2011-02 http://dx.doi.org/10.1039/C0EE00213E http://hdl.handle.net/10022/AC:P:13684 NNC NNC 2012-06-27 15:03:56 -0400 2013-02-19 15:00:41 -0500 7686 eng