Journal
JOURNAL OF CO2 UTILIZATION
Volume 1, Issue -, Pages 1-7Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jcou.2013.03.007
Keywords
Nanosilica; Chemically grafted organoamines; Carbon dioxide capture
Funding
- Loker Hydrocarbon Research Institute
- United States Department of Energy
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Organoamine-inorganic hybrid adsorbent materials were synthesized by covalent immobilization of alkylaminotrimethoxysilanes and polyethyleneiminetrimethoxysilane onto fumed silica (nanosilica). The obtained silica-organic hybrid materials were characterized by thermogravimetry and diffuse reflectance infrared Fourier transform spectroscopy (DRIFT) confirming the successful grafting of the amine derivatives to silica and their surface area measured using Brunauer-Emmett-Teller method (BET). The influence of reaction conditions on the graft density of organoamines was investigated and it was found that the saturation of the silane coupling agents with carbon dioxide prior to surface modification resulted in higher graft densities. Carbon dioxide uptake of the obtained hybrid materials were determined by thermogravimetric analysis at room temperature as well as higher temperatures resulting in CO2 adsorption capacities from 32.4 to 69.7 mg g(-1) adsorbent. (C) 2013 Elsevier Ltd. All rights reserved.
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