Key Applications and Potential Limitations of Ionic Liquid Membranes in the Gas Separation Process of CO<sub>2</sub>, CH<sub>4</sub>, N<sub>2</sub>, H<sub>2</sub> or Mixtures of These Gases from Various Gas Streams
Heightened levels of carbon dioxide (CO<sub>2</sub>) and other greenhouse gases (GHGs) have prompted research into techniques for their capture and separation, including membrane separation, chemical looping, and cryogenic distillation. Ionic liquids, due to their negligible vapour press...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-09-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/25/18/4274 |
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| author | Salma Elhenawy Majeda Khraisheh Fares AlMomani Mohamed Hassan |
| author_facet | Salma Elhenawy Majeda Khraisheh Fares AlMomani Mohamed Hassan |
| author_sort | Salma Elhenawy |
| collection | DOAJ |
| description | Heightened levels of carbon dioxide (CO<sub>2</sub>) and other greenhouse gases (GHGs) have prompted research into techniques for their capture and separation, including membrane separation, chemical looping, and cryogenic distillation. Ionic liquids, due to their negligible vapour pressure, thermal stability, and broad electrochemical stability have expanded their application in gas separations. This work provides an overview of the recent developments and applications of ionic liquid membranes (ILMs) for gas separation by focusing on the separation of carbon dioxide (CO<sub>2</sub>), methane (CH<sub>4</sub>), nitrogen (N<sub>2</sub>), hydrogen (H<sub>2</sub>)<sub>,</sub> or mixtures of these gases from various gas streams. The three general types of ILMs, such as supported ionic liquid membranes (SILMs), ionic liquid polymeric membranes (ILPMs), and ionic liquid mixed-matrix membranes (ILMMMs) for the separation of various mixed gas systems, are discussed in detail. Furthermore, issues, challenges, computational studies and future perspectives for ILMs are also considered. The results of the analysis show that SILMs, ILPMs, and the ILMMs are very promising membranes that have great potential in gas separation processes. They offer a wide range of permeabilities and selectivities for CO<sub>2</sub>, CH<sub>4</sub>, N<sub>2</sub>, H<sub>2</sub> or mixtures of these gases. In addition, a comparison was made based on the selectivity and permeability of SILMs, ILPMs, and ILMMMs for CO<sub>2</sub>/CH<sub>4</sub> separation based on a Robeson’s upper bound curves. |
| first_indexed | 2024-03-10T16:14:58Z |
| format | Article |
| id | doaj.art-d62c9056efc24a95bc8507a0f023b274 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T16:14:58Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-d62c9056efc24a95bc8507a0f023b2742023-11-20T14:11:59ZengMDPI AGMolecules1420-30492020-09-012518427410.3390/molecules25184274Key Applications and Potential Limitations of Ionic Liquid Membranes in the Gas Separation Process of CO<sub>2</sub>, CH<sub>4</sub>, N<sub>2</sub>, H<sub>2</sub> or Mixtures of These Gases from Various Gas StreamsSalma Elhenawy0Majeda Khraisheh1Fares AlMomani2Mohamed Hassan3Department of Chemical Engineering, College of Engineering, Qatar University, Doha P.O. Box 2713, QatarDepartment of Chemical Engineering, College of Engineering, Qatar University, Doha P.O. Box 2713, QatarDepartment of Chemical Engineering, College of Engineering, Qatar University, Doha P.O. Box 2713, QatarCenter for Advanced Materials, Qatar University, Doha P.O. Box 2713, QatarHeightened levels of carbon dioxide (CO<sub>2</sub>) and other greenhouse gases (GHGs) have prompted research into techniques for their capture and separation, including membrane separation, chemical looping, and cryogenic distillation. Ionic liquids, due to their negligible vapour pressure, thermal stability, and broad electrochemical stability have expanded their application in gas separations. This work provides an overview of the recent developments and applications of ionic liquid membranes (ILMs) for gas separation by focusing on the separation of carbon dioxide (CO<sub>2</sub>), methane (CH<sub>4</sub>), nitrogen (N<sub>2</sub>), hydrogen (H<sub>2</sub>)<sub>,</sub> or mixtures of these gases from various gas streams. The three general types of ILMs, such as supported ionic liquid membranes (SILMs), ionic liquid polymeric membranes (ILPMs), and ionic liquid mixed-matrix membranes (ILMMMs) for the separation of various mixed gas systems, are discussed in detail. Furthermore, issues, challenges, computational studies and future perspectives for ILMs are also considered. The results of the analysis show that SILMs, ILPMs, and the ILMMs are very promising membranes that have great potential in gas separation processes. They offer a wide range of permeabilities and selectivities for CO<sub>2</sub>, CH<sub>4</sub>, N<sub>2</sub>, H<sub>2</sub> or mixtures of these gases. In addition, a comparison was made based on the selectivity and permeability of SILMs, ILPMs, and ILMMMs for CO<sub>2</sub>/CH<sub>4</sub> separation based on a Robeson’s upper bound curves.https://www.mdpi.com/1420-3049/25/18/4274membrane separationselectivitypermeabilitySILMsILPMsILMMMs |
| spellingShingle | Salma Elhenawy Majeda Khraisheh Fares AlMomani Mohamed Hassan Key Applications and Potential Limitations of Ionic Liquid Membranes in the Gas Separation Process of CO<sub>2</sub>, CH<sub>4</sub>, N<sub>2</sub>, H<sub>2</sub> or Mixtures of These Gases from Various Gas Streams Molecules membrane separation selectivity permeability SILMs ILPMs ILMMMs |
| title | Key Applications and Potential Limitations of Ionic Liquid Membranes in the Gas Separation Process of CO<sub>2</sub>, CH<sub>4</sub>, N<sub>2</sub>, H<sub>2</sub> or Mixtures of These Gases from Various Gas Streams |
| title_full | Key Applications and Potential Limitations of Ionic Liquid Membranes in the Gas Separation Process of CO<sub>2</sub>, CH<sub>4</sub>, N<sub>2</sub>, H<sub>2</sub> or Mixtures of These Gases from Various Gas Streams |
| title_fullStr | Key Applications and Potential Limitations of Ionic Liquid Membranes in the Gas Separation Process of CO<sub>2</sub>, CH<sub>4</sub>, N<sub>2</sub>, H<sub>2</sub> or Mixtures of These Gases from Various Gas Streams |
| title_full_unstemmed | Key Applications and Potential Limitations of Ionic Liquid Membranes in the Gas Separation Process of CO<sub>2</sub>, CH<sub>4</sub>, N<sub>2</sub>, H<sub>2</sub> or Mixtures of These Gases from Various Gas Streams |
| title_short | Key Applications and Potential Limitations of Ionic Liquid Membranes in the Gas Separation Process of CO<sub>2</sub>, CH<sub>4</sub>, N<sub>2</sub>, H<sub>2</sub> or Mixtures of These Gases from Various Gas Streams |
| title_sort | key applications and potential limitations of ionic liquid membranes in the gas separation process of co sub 2 sub ch sub 4 sub n sub 2 sub h sub 2 sub or mixtures of these gases from various gas streams |
| topic | membrane separation selectivity permeability SILMs ILPMs ILMMMs |
| url | https://www.mdpi.com/1420-3049/25/18/4274 |
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