New cellulose based ionic compounds as low-cost sorbents for CO2 capture

New cellulose based ionic compounds as low-cost sorbents for CO2 capture

Author Bernard, Franciele L. Google Scholar
Rodrigues, Daniela. M. Google Scholar
Polesso, Barbara B. Google Scholar
Donato, Augusto J. Google Scholar
Seferin, Marcus Google Scholar
Chaban, Vitaly V. Autor UNIFESP Google Scholar
Dalla Vecchia, Felipe Google Scholar
Einloft, Sandra Google Scholar
Abstract Supporting ionic liquids in solid materials is a promising solution to address CO2 capture. Cellulose is a versatile and low-cost material. The support of different ionic liquids cations on cellulose extracted from rice husk is an excellent strategy for CO2 capture. This study reports chemical modification of cellulose fibers extracted from rice husk with different ionic liquids cations and its potential for CO2 capture. The obtained ionic compounds were characterized by FTIR, XRD, FESEM, TGA and BET. CO2 sorption capacity was gravimetrically assessed in a Magnetic Suspension Balance (MSB). In addition, ab Initio calculations were performed. First, the carboxylate groups are responsible for the CO2 capture process. Second, the cation maintains the CO2 binding sites of the anion partially or fully non-occupied, improving the CO2-ionic compound affinity. The best result for CO2 sorption was obtained for the ionic compound CL-TBA of 71 mgCO(2)/g at 3 MPa and 25 degrees C. At lower pressures, this compound presents a high CO2 sorption value (44 mgCO(2)/g at 0.1 MPa). We conclude that these ionic compounds deserve further attention in the post-combustion process. (C) 2016 Elsevier B.V. All rights reserved.
Keywords Modified cellulose
Ionic compounds
Low-cost sorbents
Carbon dioxide capture
Quantum mechanical simulations
xmlui.dri2xhtml.METS-1.0.item-coverage Amsterdam
Language English
Sponsor CNPq
Hewlett-Packard Brasil Ltda.
Date 2016
Published in Fuel Processing Technology. Amsterdam, v. 149, p. 131-138, 2016.
ISSN 0378-3820 (Sherpa/Romeo, impact factor)
Publisher Elsevier Science Bv
Extent 131-138
Access rights Closed access
Type Article
Web of Science ID WOS:000378183100014

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