Amines immobilized double-walled silica nanotubes for CO2 capture

Title
Amines immobilized double-walled silica nanotubes for CO2 capture
Authors
고영건이현정오현철최웅수
Keywords
Amine type; Aminosilane; Double-walled silica nanotube; CO2 capture
Issue Date
2013-04
Publisher
Journal of hazardous materials
Citation
VOL 250-251, 53-60
Abstract
Novel silica support has been required for high amine loading and good CO2 molecule diffusion into its pores to increase the performance of CO2 adsorbents. Herein, amine groups supported on double-walled silica nanotubes (DWSNTs) have been prepared via the immobilization of various aminosilanes (primary, secondary, tertiary, di-, and tri-aminosilanes) on DWSNT, and found to be a very effective adsorbent for CO2 capture. Amine groups immobilized DWSNTs captured CO2 reversibly in a temperature swing process at various adsorption temperatures (25 °C, 50 °C, 75 °C, and 100 °C). The amines on modified DWSNTs showed high CO2 capture capacity in the order of tri-, di-, primary, secondary, and tertiary amines. The CO2 capture capacity of all aminosilanes immobilized DWSNTs decreased linearly with the increase of the adsorption temperature. We expect that DWSNT would be able to inspire researchers to use it not only as a support for CO2 capture but also as a promising candidate for various applications.
URI
http://pubs.kist.re.kr/handle/201004/44558
ISSN
03043894
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