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Article

Tunning CO2 Separation Performance of Ionic Liquids through Asymmetric Anions

1
Centro de Química Estrutural, Departamento de Engenharia Química, Institute of Molecular Sciences, Instituto Superior Técnico de Lisboa, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
2
Luxembourg Institute of Science and Technology (LIST), 5 Avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg
3
Department of Physics and Materials Science, University of Luxembourg, 2 Avenue de l’Université, L-4365 Esch-sur-Alzette, Luxembourg
4
A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences (INEOS RAS), Vavilov Str. 28, GSP-1, 119991 Moscow, Russia
*
Author to whom correspondence should be addressed.
These authors contributed equally.
Academic Editor: Mara G. Freire
Molecules 2022, 27(2), 413; https://doi.org/10.3390/molecules27020413
Received: 17 December 2021 / Revised: 31 December 2021 / Accepted: 4 January 2022 / Published: 9 January 2022
(This article belongs to the Special Issue Green Chemistry in Portugal)
This work aims to explore the gas permeation performance of two newly-designed ionic liquids, [C2mim][CF3BF3] and [C2mim][CF3SO2C(CN)2], in supported ionic liquid membranes (SILM) configuration, as another effort to provide an overall insight on the gas permeation performance of functionalized-ionic liquids with the [C2mim]+ cation. [C2mim][CF3BF3] and [C2mim][CF3SO2C(CN)2] single gas separation performance towards CO2, N2, and CH4 at T = 293 K and T = 308 K were measured using the time-lag method. Assessing the CO2 permeation results, [C2mim][CF3BF3] showed an undermined value of 710 Barrer at 293.15 K and 1 bar of feed pressure when compared to [C2mim][BF4], whereas for the [C2mim][CF3SO2C(CN)2] IL an unexpected CO2 permeability of 1095 Barrer was attained at the same experimental conditions, overcoming the results for the remaining ILs used for comparison. The prepared membranes exhibited diverse permselectivities, varying from 16.9 to 22.2 for CO2/CH4 and 37.0 to 44.4 for CO2/N2 gas pairs. The thermophysical properties of the [C2mim][CF3BF3] and [C2mim][CF3SO2C(CN)2] ILs were also determined in the range of T = 293.15 K up to T = 353.15 K at atmospheric pressure and compared with those for other ILs with the same cation and anion’s with similar chemical moieties. View Full-Text
Keywords: gas separation; ionic liquids; carbon dioxide; supported liquid membranes; asymmetric anions gas separation; ionic liquids; carbon dioxide; supported liquid membranes; asymmetric anions
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MDPI and ACS Style

Soares, B.F.; Nosov, D.R.; Pires, J.M.; Tyutyunov, A.A.; Lozinskaya, E.I.; Antonov, D.Y.; Shaplov, A.S.; Marrucho, I.M. Tunning CO2 Separation Performance of Ionic Liquids through Asymmetric Anions. Molecules 2022, 27, 413. https://doi.org/10.3390/molecules27020413

AMA Style

Soares BF, Nosov DR, Pires JM, Tyutyunov AA, Lozinskaya EI, Antonov DY, Shaplov AS, Marrucho IM. Tunning CO2 Separation Performance of Ionic Liquids through Asymmetric Anions. Molecules. 2022; 27(2):413. https://doi.org/10.3390/molecules27020413

Chicago/Turabian Style

Soares, Bruna F., Daniil R. Nosov, José M. Pires, Andrey A. Tyutyunov, Elena I. Lozinskaya, Dmitrii Y. Antonov, Alexander S. Shaplov, and Isabel M. Marrucho. 2022. "Tunning CO2 Separation Performance of Ionic Liquids through Asymmetric Anions" Molecules 27, no. 2: 413. https://doi.org/10.3390/molecules27020413

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