Transport of n-alkanes through graphene nanoporous atomically thin membrane
Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2019
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2019
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| Online Access: | https://hdl.handle.net/1721.1/123294 |
| _version_ | 1811080244662108160 |
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| author | Han, Kyung-Eun. |
| author2 | Rohit Karnik. |
| author_facet | Rohit Karnik. Han, Kyung-Eun. |
| author_sort | Han, Kyung-Eun. |
| collection | MIT |
| description | Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2019 |
| first_indexed | 2024-09-23T11:28:08Z |
| format | Thesis |
| id | mit-1721.1/123294 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T11:28:08Z |
| publishDate | 2019 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/1232942019-12-14T03:20:04Z Transport of n-alkanes through graphene nanoporous atomically thin membrane Han, Kyung-Eun. Rohit Karnik. Massachusetts Institute of Technology. Department of Mechanical Engineering. Massachusetts Institute of Technology. Department of Mechanical Engineering Mechanical Engineering. Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2019 Cataloged from PDF version of thesis. Includes bibliographical references (pages 67-68). Accurately characterizing molecular transport through a nanoporous atomically thin graphene membrane is important in determining potential for graphene's application as a filter. Amongst many factors that affect the transport, the effect of size of molecules is analyzed in this paper. Diffusion of n-alkanes between C10 and C18 was analyzed to isolate the effect of molecule size in transport trends. The n-alkanes are chosen as the solutes for their similar long-chains but differing lengths. Differently branched structures cause variable interactions with graphene between molecules. Thus, this structural consistency in n-alkanes make them optimal solutes. Additionally, these molecules are comprised of only carbon and hydrogen, allowing the same functional groups and polarities. However, their distinct boiling points allow detection in the gas chromatography-mass spectrometry (GCMS). A diffusion cell with feed and permeate chambers, separated by a semipermeable membrane, was used to induce diffusion with difference in solute concentration between the chambers. Diffusion concentration and rates were calculated using GCMS analysis of samples taken over 6-hour period during the diffusion. The calculations were done for diffusion with and without graphene membrane for comparison. When integrating the GCMS peaks, two types of integration methods - wide-peak and narrow-peak integrations - were used to estimate the error due to difficulties in identifying peak boundaries. These results were further compared to the inherent diffusivity coefficients of the molecules, in order to quantify the selectivity imparted by graphene for diffusion. The diffusion trends from each data set were compared to the diffusion trend from inherent diffusivity coefficients, which shows that diffusiyity should decrease with larger and heavier n-alkanes. The experimentally obtained data shows that smaller molecules diffused at faster rates, and there was a noticeable drop in the diffusion transport between C 12 and C 14. This is consistent with the expected trend. Studies that minimize sources of errors are recommended to further understand the transport of alkanes through graphene. by Kyung-Eun Han. S.B. S.B. Massachusetts Institute of Technology, Department of Mechanical Engineering 2019-12-13T19:02:56Z 2019-12-13T19:02:56Z 2019 2019 Thesis https://hdl.handle.net/1721.1/123294 1130589055 eng MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission. http://dspace.mit.edu/handle/1721.1/7582 68 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Mechanical Engineering. Han, Kyung-Eun. Transport of n-alkanes through graphene nanoporous atomically thin membrane |
| title | Transport of n-alkanes through graphene nanoporous atomically thin membrane |
| title_full | Transport of n-alkanes through graphene nanoporous atomically thin membrane |
| title_fullStr | Transport of n-alkanes through graphene nanoporous atomically thin membrane |
| title_full_unstemmed | Transport of n-alkanes through graphene nanoporous atomically thin membrane |
| title_short | Transport of n-alkanes through graphene nanoporous atomically thin membrane |
| title_sort | transport of n alkanes through graphene nanoporous atomically thin membrane |
| topic | Mechanical Engineering. |
| url | https://hdl.handle.net/1721.1/123294 |
| work_keys_str_mv | AT hankyungeun transportofnalkanesthroughgraphenenanoporousatomicallythinmembrane |