Impact of Ionic Liquid Structure and Loading on Gas Sorption and Permeation for ZIF-8-Based Composites and Mixed Matrix Membranes
Carbon dioxide (CO<sub>2</sub>) capture has become of great importance for industrial processes due to the adverse environmental effects of gas emissions. Mixed matrix membranes (MMMs) have been studied as an alternative to traditional technologies, especially due to their potential to o...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-12-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/12/1/13 |
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| author | Paloma Ortiz-Albo Tiago J. Ferreira Carla F. Martins Vitor Alves Isabel A. A. C. Esteves Luís Cunha-Silva Izumi Kumakiri João Crespo Luísa A. Neves |
| author_facet | Paloma Ortiz-Albo Tiago J. Ferreira Carla F. Martins Vitor Alves Isabel A. A. C. Esteves Luís Cunha-Silva Izumi Kumakiri João Crespo Luísa A. Neves |
| author_sort | Paloma Ortiz-Albo |
| collection | DOAJ |
| description | Carbon dioxide (CO<sub>2</sub>) capture has become of great importance for industrial processes due to the adverse environmental effects of gas emissions. Mixed matrix membranes (MMMs) have been studied as an alternative to traditional technologies, especially due to their potential to overcome the practical limitations of conventional polymeric and inorganic membranes. In this work, the effect of using different ionic liquids (ILs) with the stable metal–organic framework (MOF) ZIF-8 was evaluated. Several IL@ZIF-8 composites and IL@ZIF-8 MMMs were prepared to improve the selective CO<sub>2</sub> sorption and permeation over other gases such as methane (CH<sub>4</sub>) and nitrogen (N<sub>2</sub>). Different ILs and two distinct loadings were prepared to study not only the effect of IL concentration, but also the impact of the IL structure and affinity towards a specific gas mixture separation. Single gas sorption studies showed an improvement in CO<sub>2</sub>/CH<sub>4</sub> and CO<sub>2</sub>/N<sub>2</sub> selectivities, compared with the ones for the pristine ZIF-8, increasing with IL loading. In addition, the prepared IL@ZIF-8 MMMs showed improved CO<sub>2</sub> selective behavior and mechanical strength with respect to ZIF-8 MMMs, with a strong dependence on the intrinsic IL CO<sub>2</sub> selectivity. Therefore, the selection of high affinity ILs can lead to the improvement of CO<sub>2</sub> selective separation for IL@ZIF-8 MMMs. |
| first_indexed | 2024-03-10T00:59:16Z |
| format | Article |
| id | doaj.art-08dc4eeb46ef405ba2907f63fc66504f |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-10T00:59:16Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-08dc4eeb46ef405ba2907f63fc66504f2023-11-23T14:37:58ZengMDPI AGMembranes2077-03752021-12-011211310.3390/membranes12010013Impact of Ionic Liquid Structure and Loading on Gas Sorption and Permeation for ZIF-8-Based Composites and Mixed Matrix MembranesPaloma Ortiz-Albo0Tiago J. Ferreira1Carla F. Martins2Vitor Alves3Isabel A. A. C. Esteves4Luís Cunha-Silva5Izumi Kumakiri6João Crespo7Luísa A. Neves8LAQV/REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, PortugalLAQV/REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, PortugalLow Carbon & Resource Efficiency, R&Di, Instituto de Soldadura e Qualidade, Av. Prof. Cavaco Silva 33, 2740-120 Oeiras, PortugalLEAF—Linking Landscape, Environment, Agriculture and Food—Research Center, Associated Laboratory TERRA, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, PortugalLAQV/REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, PortugalLAQV/REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, PortugalGraduate School of Sciences and Technology for Innovation, Yamaguchi University, Ube 7558611, JapanLAQV/REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, PortugalLAQV/REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, PortugalCarbon dioxide (CO<sub>2</sub>) capture has become of great importance for industrial processes due to the adverse environmental effects of gas emissions. Mixed matrix membranes (MMMs) have been studied as an alternative to traditional technologies, especially due to their potential to overcome the practical limitations of conventional polymeric and inorganic membranes. In this work, the effect of using different ionic liquids (ILs) with the stable metal–organic framework (MOF) ZIF-8 was evaluated. Several IL@ZIF-8 composites and IL@ZIF-8 MMMs were prepared to improve the selective CO<sub>2</sub> sorption and permeation over other gases such as methane (CH<sub>4</sub>) and nitrogen (N<sub>2</sub>). Different ILs and two distinct loadings were prepared to study not only the effect of IL concentration, but also the impact of the IL structure and affinity towards a specific gas mixture separation. Single gas sorption studies showed an improvement in CO<sub>2</sub>/CH<sub>4</sub> and CO<sub>2</sub>/N<sub>2</sub> selectivities, compared with the ones for the pristine ZIF-8, increasing with IL loading. In addition, the prepared IL@ZIF-8 MMMs showed improved CO<sub>2</sub> selective behavior and mechanical strength with respect to ZIF-8 MMMs, with a strong dependence on the intrinsic IL CO<sub>2</sub> selectivity. Therefore, the selection of high affinity ILs can lead to the improvement of CO<sub>2</sub> selective separation for IL@ZIF-8 MMMs.https://www.mdpi.com/2077-0375/12/1/13CO<sub>2</sub> separationmixed matrix membrane (MMM)metal–organic framework (MOF)ionic liquid (IL)IL@MOF composite |
| spellingShingle | Paloma Ortiz-Albo Tiago J. Ferreira Carla F. Martins Vitor Alves Isabel A. A. C. Esteves Luís Cunha-Silva Izumi Kumakiri João Crespo Luísa A. Neves Impact of Ionic Liquid Structure and Loading on Gas Sorption and Permeation for ZIF-8-Based Composites and Mixed Matrix Membranes Membranes CO<sub>2</sub> separation mixed matrix membrane (MMM) metal–organic framework (MOF) ionic liquid (IL) IL@MOF composite |
| title | Impact of Ionic Liquid Structure and Loading on Gas Sorption and Permeation for ZIF-8-Based Composites and Mixed Matrix Membranes |
| title_full | Impact of Ionic Liquid Structure and Loading on Gas Sorption and Permeation for ZIF-8-Based Composites and Mixed Matrix Membranes |
| title_fullStr | Impact of Ionic Liquid Structure and Loading on Gas Sorption and Permeation for ZIF-8-Based Composites and Mixed Matrix Membranes |
| title_full_unstemmed | Impact of Ionic Liquid Structure and Loading on Gas Sorption and Permeation for ZIF-8-Based Composites and Mixed Matrix Membranes |
| title_short | Impact of Ionic Liquid Structure and Loading on Gas Sorption and Permeation for ZIF-8-Based Composites and Mixed Matrix Membranes |
| title_sort | impact of ionic liquid structure and loading on gas sorption and permeation for zif 8 based composites and mixed matrix membranes |
| topic | CO<sub>2</sub> separation mixed matrix membrane (MMM) metal–organic framework (MOF) ionic liquid (IL) IL@MOF composite |
| url | https://www.mdpi.com/2077-0375/12/1/13 |
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