Title:

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

Author(s):

Qi, Genggeng
Wang, Yanbing
Estevez, Luis
Duan, Xiaonan
Anako, Nkechi
Park, Ah-Hyung
Li, Wen
Jones, Christopher W.
Giannelis, Emmanuel P.

Date:

2011

Type:

Articles

Department:

Earth and Environmental Engineering

Volume:

4

Permanent URL:

http://hdl.handle.net/10022/AC:P:13684

Book/Journal Title:

Energy & Environmental Science

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).

Subject(s):

Physical chemistry

DOI:

http://dx.doi.org/10.1039/C0EE00213E

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