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

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

Research output: Contribution to journalArticlepeer-review

393 Scopus citations

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% CO 2). 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). © 2011 The Royal Society of Chemistry.
Original languageEnglish (US)
Pages (from-to)444-452
Number of pages9
JournalEnergy Environ. Sci.
Volume4
Issue number2
DOIs
StatePublished - 2011
Externally publishedYes

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