Relating transport modeling to nanofiltration membrane fabrication: Navigating the permeability-selectivity trade-off in desalination pretreatment
Faced with a pressing need for membranes with a higher permeability and selectivity, the field of membrane technology can benefit from a systematic framework for designing membranes with the necessary physical characteristics. In this work, we present an approach through which transport modeling is...
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| Format: | Article |
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Elsevier
2018
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| Online Access: | http://hdl.handle.net/1721.1/114293 https://orcid.org/0000-0003-4167-4186 https://orcid.org/0000-0002-2901-0638 |
| _version_ | 1811086861920108544 |
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| author | Labban, Omar Lienhard, John H. |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Labban, Omar Lienhard, John H. |
| author_sort | Labban, Omar |
| collection | MIT |
| description | Faced with a pressing need for membranes with a higher permeability and selectivity, the field of membrane technology can benefit from a systematic framework for designing membranes with the necessary physical characteristics. In this work, we present an approach through which transport modeling is employed in fabricating specialized nanofiltration membranes, that experimentally demonstrate enhanced selectivity. Specifically, the Donnan-Steric Pore Model with dielectric exclusion (DSPM-DE) is used to probe for membrane properties desirable in desalination pretreatment. Nanofiltration membranes are systematically fabricated in-house using layer-by-layer (LbL) deposition to validate model predictions and to develop a new specialized membrane for this application. The new membrane presents a 30% increase in permeability and a 50% reduction in permeate hardness relative to state-of-the-art NF membranes. Our results indicate that a ‘specialized’ tight membrane can outperform looser counterparts in both permeability and selectivity. Given the possibility of extending this framework to other applications, the work furthers our understanding of the relationships governing membrane form and function, while having broad potential implications for future nanofiltration membranes used in chemical separation and purification. Keywords: Permeability-selectivity trade-off; Low-pressure nanofiltration; Transport modeling; Membrane fabrication; Desalination pretreatment |
| first_indexed | 2024-09-23T13:36:01Z |
| format | Article |
| id | mit-1721.1/114293 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T13:36:01Z |
| publishDate | 2018 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/1142932022-10-01T15:56:33Z Relating transport modeling to nanofiltration membrane fabrication: Navigating the permeability-selectivity trade-off in desalination pretreatment Labban, Omar Lienhard, John H. Massachusetts Institute of Technology. Department of Mechanical Engineering Labban, Omar Lienhard, John H. Faced with a pressing need for membranes with a higher permeability and selectivity, the field of membrane technology can benefit from a systematic framework for designing membranes with the necessary physical characteristics. In this work, we present an approach through which transport modeling is employed in fabricating specialized nanofiltration membranes, that experimentally demonstrate enhanced selectivity. Specifically, the Donnan-Steric Pore Model with dielectric exclusion (DSPM-DE) is used to probe for membrane properties desirable in desalination pretreatment. Nanofiltration membranes are systematically fabricated in-house using layer-by-layer (LbL) deposition to validate model predictions and to develop a new specialized membrane for this application. The new membrane presents a 30% increase in permeability and a 50% reduction in permeate hardness relative to state-of-the-art NF membranes. Our results indicate that a ‘specialized’ tight membrane can outperform looser counterparts in both permeability and selectivity. Given the possibility of extending this framework to other applications, the work furthers our understanding of the relationships governing membrane form and function, while having broad potential implications for future nanofiltration membranes used in chemical separation and purification. Keywords: Permeability-selectivity trade-off; Low-pressure nanofiltration; Transport modeling; Membrane fabrication; Desalination pretreatment 2018-03-26T15:47:02Z 2018-03-26T15:47:02Z 2018-03 2018-02 2018-03-22T15:09:09Z Article http://purl.org/eprint/type/JournalArticle 0376-7388 http://hdl.handle.net/1721.1/114293 Labban, Omar et al. “Relating Transport Modeling to Nanofiltration Membrane Fabrication: Navigating the Permeability-Selectivity Trade-Off in Desalination Pretreatment.” Journal of Membrane Science 554 (May 2018): 26–38 © 2018 Elsevier B.V. https://orcid.org/0000-0003-4167-4186 https://orcid.org/0000-0002-2901-0638 http://dx.doi.org/10.1016/j.memsci.2018.02.053 Journal of Membrane Science Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Elsevier Prof. Lienhard |
| spellingShingle | Labban, Omar Lienhard, John H. Relating transport modeling to nanofiltration membrane fabrication: Navigating the permeability-selectivity trade-off in desalination pretreatment |
| title | Relating transport modeling to nanofiltration membrane fabrication: Navigating the permeability-selectivity trade-off in desalination pretreatment |
| title_full | Relating transport modeling to nanofiltration membrane fabrication: Navigating the permeability-selectivity trade-off in desalination pretreatment |
| title_fullStr | Relating transport modeling to nanofiltration membrane fabrication: Navigating the permeability-selectivity trade-off in desalination pretreatment |
| title_full_unstemmed | Relating transport modeling to nanofiltration membrane fabrication: Navigating the permeability-selectivity trade-off in desalination pretreatment |
| title_short | Relating transport modeling to nanofiltration membrane fabrication: Navigating the permeability-selectivity trade-off in desalination pretreatment |
| title_sort | relating transport modeling to nanofiltration membrane fabrication navigating the permeability selectivity trade off in desalination pretreatment |
| url | http://hdl.handle.net/1721.1/114293 https://orcid.org/0000-0003-4167-4186 https://orcid.org/0000-0002-2901-0638 |
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