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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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Supplementary files

Article information


Submitted
02 Jul 2010
Accepted
10 Sep 2010
First published
18 Oct 2010

Energy Environ. Sci., 2011,4, 444-452
Article type
Paper

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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