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Issue 2, 2011
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High efficiency nanocomposite sorbents for CO2 capture based on amine-functionalized mesoporous capsules

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Abstract

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 g−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 adsorption–regeneration tests (50 cycles).

Graphical abstract: High efficiency nanocomposite sorbents for CO2 capture based on amine-functionalized mesoporous capsules

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Publication details

The article was received on 02 Jul 2010, accepted on 10 Sep 2010 and first published on 18 Oct 2010


Article type: Paper
DOI: 10.1039/C0EE00213E
Citation: Energy Environ. Sci., 2011,4, 444-452
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    High efficiency nanocomposite sorbents for CO2 capture based on amine-functionalized mesoporous capsules

    G. Qi, Y. Wang, L. Estevez, X. Duan, N. Anako, A. A. Park, W. Li, C. W. Jones and E. P. Giannelis, Energy Environ. Sci., 2011, 4, 444
    DOI: 10.1039/C0EE00213E

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