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

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

• Book ID: 119969931
• Publisher: Royal Society of Chemistry
• Year: 2011
• Tongue: English
• Weight: 421 KB
• Volume: 4
• Category: Article
• ISSN: 1754-5692
• DOI: 10.1039/C0EE00213E

✦ Synopsis

A novel high efficiency nanocomposite sorbent for CO 2 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 À1 under simulated flue gas conditions (pre-humidified 10% CO 2 ). The CO 2 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 CO 2 capture capacity were investigated. Larger particle size, higher interior void volume and thinner mesoporous shell thickness all improved the CO 2 capacity of the sorbents. PEI impregnated sorbents showed good reversibility and stability during cyclic adsorption-regeneration tests (50 cycles).