On the performance of vertically aligned graphene array membranes for desalination
In this paper, we perform molecular dynamics simulations to investigate the performance of multilayer graphene slit membranes. Graphene slit membranes at a critical slit size have been found to be promising desalination membranes. In this contribution, it is shown that multilayer slit membranes have...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/163447 |
| _version_ | 1826128267153768448 |
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| author | Toh, William Ang, Elisa Yun Mei Lin, Rongming Liu, Zishun Ng, Teng Yong |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Toh, William Ang, Elisa Yun Mei Lin, Rongming Liu, Zishun Ng, Teng Yong |
| author_sort | Toh, William |
| collection | NTU |
| description | In this paper, we perform molecular dynamics simulations to investigate the performance of multilayer graphene slit membranes. Graphene slit membranes at a critical slit size have been found to be promising desalination membranes. In this contribution, it is shown that multilayer slit membranes have the potential to provide significantly better permeability while retaining outstanding salt rejection. Improved permeability of the membrane is achieved by using slits of widths larger than the critical slit size required to reject salt through size exclusion, and desalination of sea water is performed by increased resistance to salt passage through the multilayering. To facilitate the design process of future multilayer membranes, we analyze the flow resistance of the membrane as a combination of electrical resistors in series and show that this analogy works for membranes where the layers possess the same slit size, as well as membranes with layers of different slit sizes. Comparing with single layer graphene membranes, it was shown that it is possible to obtain 55% improvement in permeability without loss in salt rejection capabilities through multilayering. This opens up possibilities for membrane designers to be free from the restrictions of using a single layer graphene slit membrane with a fixed slit width. |
| first_indexed | 2024-10-01T07:22:09Z |
| format | Journal Article |
| id | ntu-10356/163447 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:22:09Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1634472022-12-06T08:21:31Z On the performance of vertically aligned graphene array membranes for desalination Toh, William Ang, Elisa Yun Mei Lin, Rongming Liu, Zishun Ng, Teng Yong School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Molecular Dynamics Multilayer Graphene Membrane In this paper, we perform molecular dynamics simulations to investigate the performance of multilayer graphene slit membranes. Graphene slit membranes at a critical slit size have been found to be promising desalination membranes. In this contribution, it is shown that multilayer slit membranes have the potential to provide significantly better permeability while retaining outstanding salt rejection. Improved permeability of the membrane is achieved by using slits of widths larger than the critical slit size required to reject salt through size exclusion, and desalination of sea water is performed by increased resistance to salt passage through the multilayering. To facilitate the design process of future multilayer membranes, we analyze the flow resistance of the membrane as a combination of electrical resistors in series and show that this analogy works for membranes where the layers possess the same slit size, as well as membranes with layers of different slit sizes. Comparing with single layer graphene membranes, it was shown that it is possible to obtain 55% improvement in permeability without loss in salt rejection capabilities through multilayering. This opens up possibilities for membrane designers to be free from the restrictions of using a single layer graphene slit membrane with a fixed slit width. 2022-12-06T08:21:31Z 2022-12-06T08:21:31Z 2022 Journal Article Toh, W., Ang, E. Y. M., Lin, R., Liu, Z. & Ng, T. Y. (2022). On the performance of vertically aligned graphene array membranes for desalination. ACS Applied Materials and Interfaces, 14(23), 27405-27412. https://dx.doi.org/10.1021/acsami.2c05425 1944-8244 https://hdl.handle.net/10356/163447 10.1021/acsami.2c05425 35666644 2-s2.0-85133313376 23 14 27405 27412 en ACS Applied Materials and Interfaces © 2022 American Chemical Society. All rights reserved. |
| spellingShingle | Engineering::Mechanical engineering Molecular Dynamics Multilayer Graphene Membrane Toh, William Ang, Elisa Yun Mei Lin, Rongming Liu, Zishun Ng, Teng Yong On the performance of vertically aligned graphene array membranes for desalination |
| title | On the performance of vertically aligned graphene array membranes for desalination |
| title_full | On the performance of vertically aligned graphene array membranes for desalination |
| title_fullStr | On the performance of vertically aligned graphene array membranes for desalination |
| title_full_unstemmed | On the performance of vertically aligned graphene array membranes for desalination |
| title_short | On the performance of vertically aligned graphene array membranes for desalination |
| title_sort | on the performance of vertically aligned graphene array membranes for desalination |
| topic | Engineering::Mechanical engineering Molecular Dynamics Multilayer Graphene Membrane |
| url | https://hdl.handle.net/10356/163447 |
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