Dynamic water absorption-desorption by aqueous salt solutions
Salt solutions have attracted significant interest as water sorbents for a wide range of applications due to their large hygroscopicity and low cost. However, despite their promise, no existing model fully describes the experimentally observed absorption and desorption behavior of salts. Here, we de...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
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Elsevier BV
2024
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| Online Access: | https://hdl.handle.net/1721.1/156732 |
| _version_ | 1811097429655683072 |
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| author | Díaz-Marín, Carlos D. Deshmukh, Akshay Roper, Miles A. Lienhard, John H. Chen, Gang |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Díaz-Marín, Carlos D. Deshmukh, Akshay Roper, Miles A. Lienhard, John H. Chen, Gang |
| author_sort | Díaz-Marín, Carlos D. |
| collection | MIT |
| description | Salt solutions have attracted significant interest as water sorbents for a wide range of applications due to their large hygroscopicity and low cost. However, despite their promise, no existing model fully describes the experimentally observed absorption and desorption behavior of salts. Here, we develop a model that accurately captures absorption and desorption of water vapor into salt solutions. Our results show that the nonlinear driving force due to the chemical activity of water leads to previously unexplained behaviors such as faster desorption than absorption and absorption-rate dependence on humidity. We leverage our model to demonstrate the trade-off of uptake and sorption time as the humidity and salt type are changed and show the dependence of the timescale on the system’s parameters. This model represents a fundamental advancement in the understanding of salt solution absorption-desorption and supports the optimization of water sorption applications. |
| first_indexed | 2024-09-23T16:59:24Z |
| format | Article |
| id | mit-1721.1/156732 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T16:59:24Z |
| publishDate | 2024 |
| publisher | Elsevier BV |
| record_format | dspace |
| spelling | mit-1721.1/1567322024-09-14T03:01:25Z Dynamic water absorption-desorption by aqueous salt solutions Díaz-Marín, Carlos D. Deshmukh, Akshay Roper, Miles A. Lienhard, John H. Chen, Gang Massachusetts Institute of Technology. Department of Mechanical Engineering Salt solutions have attracted significant interest as water sorbents for a wide range of applications due to their large hygroscopicity and low cost. However, despite their promise, no existing model fully describes the experimentally observed absorption and desorption behavior of salts. Here, we develop a model that accurately captures absorption and desorption of water vapor into salt solutions. Our results show that the nonlinear driving force due to the chemical activity of water leads to previously unexplained behaviors such as faster desorption than absorption and absorption-rate dependence on humidity. We leverage our model to demonstrate the trade-off of uptake and sorption time as the humidity and salt type are changed and show the dependence of the timescale on the system’s parameters. This model represents a fundamental advancement in the understanding of salt solution absorption-desorption and supports the optimization of water sorption applications. Department of Energy (DOE) 2024-09-13T18:22:48Z 2024-09-13T18:22:48Z 2024-05 Article http://purl.org/eprint/type/JournalArticle 2666-3864 https://hdl.handle.net/1721.1/156732 Díaz-Marín, Carlos D., Deshmukh, Akshay, Roper, Miles A., Lienhard, John H. and Chen, Gang. 2024. "Dynamic water absorption-desorption by aqueous salt solutions." Cell Reports Physical Science, 5 (5). 10.1016/j.xcrp.2024.101929 10.1016/j.xcrp.2024.101929 Cell Reports Physical Science Creative Commons Attribution-Noncommercial http://creativecommons.org/licenses/by-nc/4.0/ application/pdf Elsevier BV Author |
| spellingShingle | Díaz-Marín, Carlos D. Deshmukh, Akshay Roper, Miles A. Lienhard, John H. Chen, Gang Dynamic water absorption-desorption by aqueous salt solutions |
| title | Dynamic water absorption-desorption by aqueous salt solutions |
| title_full | Dynamic water absorption-desorption by aqueous salt solutions |
| title_fullStr | Dynamic water absorption-desorption by aqueous salt solutions |
| title_full_unstemmed | Dynamic water absorption-desorption by aqueous salt solutions |
| title_short | Dynamic water absorption-desorption by aqueous salt solutions |
| title_sort | dynamic water absorption desorption by aqueous salt solutions |
| url | https://hdl.handle.net/1721.1/156732 |
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