CO2 sorption performance by aminosilane functionalized spheres prepared via co‐condensation and post‐synthesis methods |
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| Authors: | David Madden Teresa Curtin John P Hanrahan Joseph Tobin |
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| Affiliation: | 1. Materials and Surface Science Institute, Dept. of Chemical and Environmental Sciences, University of Limerick, Ireland;2. Glantreo Ltd., Environmental Research Institute (ERI), Cork, Ireland |
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| Abstract: | Amine functionalized silica microspheres were synthesised via a modified Stöber reaction for carbon dioxide (CO2) adsorption. A number of adsorbents were synthesized by co‐condensation and post synthesis immobilization of amines on porous silica spheres. CO2 adsorption studies were carried out on a fixed bed gas adsorption rig with online mass spectrometry. Amine co‐condensed silica spheres were found to adsorb up to 66 mg CO2 g?1 solid in a 0.15 atm CO2 stream at 35°C. Simple post‐synthesis addition of aminopropyltriethoxysilane to amine co‐condensed silica was found to significantly increase the uptake of CO2 to 211 mg CO2 g?1 under similar conditions, with CO2 desorption commencing at temperatures as low as 60°C. The optimum temperature for adsorption was found to be 35°C. This work presents a CO2 adsorbent prepared via a simple synthesis method, with a high CO2 adsorption capacity and favorable CO2 adsorption/desorption performance under simulated flue gas conditions. © 2016 American Institute of Chemical Engineers AIChE J, 62: 2825–2832, 2016 |
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| Keywords: | adsorption/gas temperature programmed desorption carbon dioxide capture |
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