Integration of Stable Ionic Liquid-Based Nanofluids into Polymer Membranes. Part II: Gas Separation Properties toward Fluorinated Greenhouse Gases
Membrane technology can play a very influential role in the separation of the constituents of HFC refrigerant gas mixtures, which usually exhibit azeotropic or near-azeotropic behavior, with the goal of promoting the reuse of value-added compounds in the manufacture of new low-global warming potenti...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/3/582 |
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| author | Fernando Pardo Sergio V. Gutiérrez-Hernández Carolina Hermida-Merino João M. M. Araújo Manuel M. Piñeiro Ana B. Pereiro Gabriel Zarca Ane Urtiaga |
| author_facet | Fernando Pardo Sergio V. Gutiérrez-Hernández Carolina Hermida-Merino João M. M. Araújo Manuel M. Piñeiro Ana B. Pereiro Gabriel Zarca Ane Urtiaga |
| author_sort | Fernando Pardo |
| collection | DOAJ |
| description | Membrane technology can play a very influential role in the separation of the constituents of HFC refrigerant gas mixtures, which usually exhibit azeotropic or near-azeotropic behavior, with the goal of promoting the reuse of value-added compounds in the manufacture of new low-global warming potential (GWP) refrigerant mixtures that abide by the current F-gases regulations. In this context, the selective recovery of difluorometane (R32, GWP = 677) from the commercial blend R410A (GWP = 1924), an equimass mixture of R32 and pentafluoroethane (R125, GWP = 3170), is sought. To that end, this work explores for the first time the separation performance of novel mixed-matrix membranes (MMMs) functionalized with ioNanofluids (IoNFs) consisting in a stable suspension of exfoliated graphene nanoplatelets (xGnP) into a fluorinated ionic liquid (FIL), 1-ethyl-3-methylpyridinium perfluorobutanesulfonate ([C<sub>2</sub>C<sub>1</sub>py][C<sub>4</sub>F<sub>9</sub>SO<sub>3</sub>]). The results show that the presence of IoNF in the MMMs significantly enhances gas permeation, yet at the expense of slightly decreasing the selectivity of the base polymer. The best results were obtained with the MMM containing 40 wt% IoNF, which led to an improved permeability of the gas of interest (<i>P<sub>R32</sub> =</i> 496 barrer) with respect to that of the neat polymer (<i>P<sub>R32</sub></i> = 279 barrer) with a mixed-gas separation factor of 3.0 at the highest feed R410A pressure tested. Overall, the newly fabricated IoNF-MMMs allowed the separation of the near-azeotropic R410A mixture to recover the low-GWP R32 gas, which is of great interest for the circular economy of the refrigeration sector. |
| first_indexed | 2024-03-09T00:30:31Z |
| format | Article |
| id | doaj.art-77cb7bb0b7994e9c8fcdb9e39c364f73 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T00:30:31Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-77cb7bb0b7994e9c8fcdb9e39c364f732023-12-11T18:35:06ZengMDPI AGNanomaterials2079-49912021-02-0111358210.3390/nano11030582Integration of Stable Ionic Liquid-Based Nanofluids into Polymer Membranes. Part II: Gas Separation Properties toward Fluorinated Greenhouse GasesFernando Pardo0Sergio V. Gutiérrez-Hernández1Carolina Hermida-Merino2João M. M. Araújo3Manuel M. Piñeiro4Ana B. Pereiro5Gabriel Zarca6Ane Urtiaga7Department of Chemical and Biomolecular Engineering, Universidad de Cantabria, 39005 Santander, SpainDepartment of Chemical and Biomolecular Engineering, Universidad de Cantabria, 39005 Santander, SpainCentro de Investigaciones Biomédicas (CINBIO), Departamento de Física Aplicada, Universidade de Vigo, 36310 Vigo, SpainLAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, PortugalCentro de Investigaciones Biomédicas (CINBIO), Departamento de Física Aplicada, Universidade de Vigo, 36310 Vigo, SpainLAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, PortugalDepartment of Chemical and Biomolecular Engineering, Universidad de Cantabria, 39005 Santander, SpainDepartment of Chemical and Biomolecular Engineering, Universidad de Cantabria, 39005 Santander, SpainMembrane technology can play a very influential role in the separation of the constituents of HFC refrigerant gas mixtures, which usually exhibit azeotropic or near-azeotropic behavior, with the goal of promoting the reuse of value-added compounds in the manufacture of new low-global warming potential (GWP) refrigerant mixtures that abide by the current F-gases regulations. In this context, the selective recovery of difluorometane (R32, GWP = 677) from the commercial blend R410A (GWP = 1924), an equimass mixture of R32 and pentafluoroethane (R125, GWP = 3170), is sought. To that end, this work explores for the first time the separation performance of novel mixed-matrix membranes (MMMs) functionalized with ioNanofluids (IoNFs) consisting in a stable suspension of exfoliated graphene nanoplatelets (xGnP) into a fluorinated ionic liquid (FIL), 1-ethyl-3-methylpyridinium perfluorobutanesulfonate ([C<sub>2</sub>C<sub>1</sub>py][C<sub>4</sub>F<sub>9</sub>SO<sub>3</sub>]). The results show that the presence of IoNF in the MMMs significantly enhances gas permeation, yet at the expense of slightly decreasing the selectivity of the base polymer. The best results were obtained with the MMM containing 40 wt% IoNF, which led to an improved permeability of the gas of interest (<i>P<sub>R32</sub> =</i> 496 barrer) with respect to that of the neat polymer (<i>P<sub>R32</sub></i> = 279 barrer) with a mixed-gas separation factor of 3.0 at the highest feed R410A pressure tested. Overall, the newly fabricated IoNF-MMMs allowed the separation of the near-azeotropic R410A mixture to recover the low-GWP R32 gas, which is of great interest for the circular economy of the refrigeration sector.https://www.mdpi.com/2079-4991/11/3/582ionanofluidmixed-matrix membranepoly(ether-block-amide)global warmingfluorinated refrigerantR32 recovery |
| spellingShingle | Fernando Pardo Sergio V. Gutiérrez-Hernández Carolina Hermida-Merino João M. M. Araújo Manuel M. Piñeiro Ana B. Pereiro Gabriel Zarca Ane Urtiaga Integration of Stable Ionic Liquid-Based Nanofluids into Polymer Membranes. Part II: Gas Separation Properties toward Fluorinated Greenhouse Gases Nanomaterials ionanofluid mixed-matrix membrane poly(ether-block-amide) global warming fluorinated refrigerant R32 recovery |
| title | Integration of Stable Ionic Liquid-Based Nanofluids into Polymer Membranes. Part II: Gas Separation Properties toward Fluorinated Greenhouse Gases |
| title_full | Integration of Stable Ionic Liquid-Based Nanofluids into Polymer Membranes. Part II: Gas Separation Properties toward Fluorinated Greenhouse Gases |
| title_fullStr | Integration of Stable Ionic Liquid-Based Nanofluids into Polymer Membranes. Part II: Gas Separation Properties toward Fluorinated Greenhouse Gases |
| title_full_unstemmed | Integration of Stable Ionic Liquid-Based Nanofluids into Polymer Membranes. Part II: Gas Separation Properties toward Fluorinated Greenhouse Gases |
| title_short | Integration of Stable Ionic Liquid-Based Nanofluids into Polymer Membranes. Part II: Gas Separation Properties toward Fluorinated Greenhouse Gases |
| title_sort | integration of stable ionic liquid based nanofluids into polymer membranes part ii gas separation properties toward fluorinated greenhouse gases |
| topic | ionanofluid mixed-matrix membrane poly(ether-block-amide) global warming fluorinated refrigerant R32 recovery |
| url | https://www.mdpi.com/2079-4991/11/3/582 |
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