Molecular sieving of linear and branched C-6 alkanes by tannin-derived carbons
Castro-Gutierrez J, De Oliveira Jardim E, Canevesi RLS, Silvestre-Albero J, Kriesten M, Thommes M, Celzard A, Fierro V (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 174
Pages Range: 413-422
DOI: 10.1016/j.carbon.2020.12.061
Abstract
Two micro-mesoporous carbons (MMCs): a disordered mesoporous carbon (DMC) and an ordered mesoporous carbon (OMC), synthesized by an easy, low-cost, and green method are proposed as efficient hydrocarbon sieves for the separation of C-6 isomers: n-hexane (nHEX), 2-methylpenthane (2 MP) and 2,2-dimethylbutane (22DMB). Their textural characterization reveals a highly interconnected pore network within the DMC, while a reverse hierarchy of ordered mesopores only accessible through narrow micropores is found in the OMC. The pore texture strongly affects their adsorption performance by kinetic and molecular sieving effects; the narrow constrictions in the OMC allow adsorption of nHEX and partially 2 MP but not 22DMB, whereas the highly connected pore network of DMC allows adsorption of the three isomers. Multi-component adsorption isotherms calculated from the single-component experimental results by ideal adsorbed solution theory (IAST) demonstrates that the OMC material has a remarkably high selectivity for the adsorption of nHEX and nHEX + 2 MP from binary and ternary mixtures, respectively. To the best of the authors' knowledge, such behavior has never been reported so far for carbon materials. Hence, this study shows that tannin-derived MMCs have great potential to be used as an eco-friendly and low-cost alternative for the selective separation of di-branched C-6 isomers. (C) 2020 Elsevier Ltd. All rights reserved.
Authors with CRIS profile
Martin Kriesten
Lehrstuhl für Thermische Verfahrenstechnik
Matthias Thommes
Lehrstuhl für Thermische Verfahrenstechnik
Involved external institutions
Université de Lorraine
France (FR)
University of Alicante / Universidad de Alicante / Universitat d'Alacant
Spain (ES)
France (FR)
University of Alicante / Universidad de Alicante / Universitat d'Alacant
Spain (ES)
How to cite
APA:
Castro-Gutierrez, J., De Oliveira Jardim, E., Canevesi, R.L.S., Silvestre-Albero, J., Kriesten, M., Thommes, M.,... Fierro, V. (2021). Molecular sieving of linear and branched C-6 alkanes by tannin-derived carbons. Carbon, 174, 413-422. https://doi.org/10.1016/j.carbon.2020.12.061
MLA:
Castro-Gutierrez, Jimena, et al. "Molecular sieving of linear and branched C-6 alkanes by tannin-derived carbons." Carbon 174 (2021): 413-422.
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