Ethanol recovery from dilute aqueous solution by perstraction using supported ionic liquid membrane (SILM)
The recovery of ethanol from dilute aqueous solution by supported ionic liquid membrane (SILM) perstraction was investigated using three potential extracting solvent of trihexyl(tetradecyl)phosphonium ionic liquids (THTDP IL): [THTDP][Br], [THTDP][N(CN)2] and [THTDP][Tf2N], and three potential polym...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2021
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| Online Access: | https://hdl.handle.net/10356/152175 |
| _version_ | 1826117611419598848 |
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| author | Huang, Ting-Yi Ho, Jia Shin Goh, Shuwen Chong, Tzyy Haur |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Huang, Ting-Yi Ho, Jia Shin Goh, Shuwen Chong, Tzyy Haur |
| author_sort | Huang, Ting-Yi |
| collection | NTU |
| description | The recovery of ethanol from dilute aqueous solution by supported ionic liquid membrane (SILM) perstraction was investigated using three potential extracting solvent of trihexyl(tetradecyl)phosphonium ionic liquids (THTDP IL): [THTDP][Br], [THTDP][N(CN)2] and [THTDP][Tf2N], and three potential polymeric microporous membranes: polyvinylidene fluoride (PVDF) (hydrophilic Durapore® GVWP and hydrophobic Durapore® GVHP) and polypropylene (PP). The solvent was chosen based on hydrophobicity, thermal stability and negligible vapor pressure; while the membrane was chosen based on physicochemical properties, commercial availability and affordability. The optimized combination of solvent and membrane was assessed in a perstraction system. The [THTDP][N(CN)2]-GVHP SILM gave the best overall performance in terms of extraction and stability. At a feed concentration of 2 wt% ethanol, the selected SILM was able to maintain its functionality for ∼240 h without observable phase intermixing. Despite being subjected to constant lateral shear on the aqueous side, the SILM retained its integrity by maintaining a high ethanol flux of > 2.2 kg/m2·h (vs. ∼10-4 – 10-1 kg/m2·h in pervaporation) and selectivity of > 320 (vs. ∼20 in liquid-liquid extraction). Subsequently, the extracted ethanol was recovered from IL by single-stage vacuum-distillation with a final purity of 80% (vs. ∼20% in single-stage vacuum-distillation alone) and an overall selectivity of 200. The long-term stability, high flux and superior selectivity of the SILM perstraction system makes it a promising alternative to other energy intensive purification techniques such as distillation for the extraction of dilute ethanol as low as 2 wt% from fermentation broths. |
| first_indexed | 2024-10-01T04:30:27Z |
| format | Journal Article |
| id | ntu-10356/152175 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:30:27Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1521752021-10-06T05:02:46Z Ethanol recovery from dilute aqueous solution by perstraction using supported ionic liquid membrane (SILM) Huang, Ting-Yi Ho, Jia Shin Goh, Shuwen Chong, Tzyy Haur School of Civil and Environmental Engineering Singapore Membrane Technology Centre Nanyang Environment and Water Research Institute Engineering::Chemical engineering::Processes and operations Engineering::Chemical engineering::Chemical processes Perstraction Supported Ionic Liquid Membrane The recovery of ethanol from dilute aqueous solution by supported ionic liquid membrane (SILM) perstraction was investigated using three potential extracting solvent of trihexyl(tetradecyl)phosphonium ionic liquids (THTDP IL): [THTDP][Br], [THTDP][N(CN)2] and [THTDP][Tf2N], and three potential polymeric microporous membranes: polyvinylidene fluoride (PVDF) (hydrophilic Durapore® GVWP and hydrophobic Durapore® GVHP) and polypropylene (PP). The solvent was chosen based on hydrophobicity, thermal stability and negligible vapor pressure; while the membrane was chosen based on physicochemical properties, commercial availability and affordability. The optimized combination of solvent and membrane was assessed in a perstraction system. The [THTDP][N(CN)2]-GVHP SILM gave the best overall performance in terms of extraction and stability. At a feed concentration of 2 wt% ethanol, the selected SILM was able to maintain its functionality for ∼240 h without observable phase intermixing. Despite being subjected to constant lateral shear on the aqueous side, the SILM retained its integrity by maintaining a high ethanol flux of > 2.2 kg/m2·h (vs. ∼10-4 – 10-1 kg/m2·h in pervaporation) and selectivity of > 320 (vs. ∼20 in liquid-liquid extraction). Subsequently, the extracted ethanol was recovered from IL by single-stage vacuum-distillation with a final purity of 80% (vs. ∼20% in single-stage vacuum-distillation alone) and an overall selectivity of 200. The long-term stability, high flux and superior selectivity of the SILM perstraction system makes it a promising alternative to other energy intensive purification techniques such as distillation for the extraction of dilute ethanol as low as 2 wt% from fermentation broths. Economic Development Board (EDB) The funding support from the Economic Development Board (EDB) of Singapore to the Singapore Membrane Technology Centre (SMTC), Nanyang Environment and Water Research Institute (NEWRI) at Nanyang Technological University (NTU) is acknowledged. 2021-10-06T05:02:03Z 2021-10-06T05:02:03Z 2021 Journal Article Huang, T., Ho, J. S., Goh, S. & Chong, T. H. (2021). Ethanol recovery from dilute aqueous solution by perstraction using supported ionic liquid membrane (SILM). Journal of Cleaner Production, 298, 126811-. https://dx.doi.org/10.1016/j.jclepro.2021.126811 0959-6526 https://hdl.handle.net/10356/152175 10.1016/j.jclepro.2021.126811 2-s2.0-85103385289 298 126811 en Journal of Cleaner Production © 2021 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Chemical engineering::Processes and operations Engineering::Chemical engineering::Chemical processes Perstraction Supported Ionic Liquid Membrane Huang, Ting-Yi Ho, Jia Shin Goh, Shuwen Chong, Tzyy Haur Ethanol recovery from dilute aqueous solution by perstraction using supported ionic liquid membrane (SILM) |
| title | Ethanol recovery from dilute aqueous solution by perstraction using supported ionic liquid membrane (SILM) |
| title_full | Ethanol recovery from dilute aqueous solution by perstraction using supported ionic liquid membrane (SILM) |
| title_fullStr | Ethanol recovery from dilute aqueous solution by perstraction using supported ionic liquid membrane (SILM) |
| title_full_unstemmed | Ethanol recovery from dilute aqueous solution by perstraction using supported ionic liquid membrane (SILM) |
| title_short | Ethanol recovery from dilute aqueous solution by perstraction using supported ionic liquid membrane (SILM) |
| title_sort | ethanol recovery from dilute aqueous solution by perstraction using supported ionic liquid membrane silm |
| topic | Engineering::Chemical engineering::Processes and operations Engineering::Chemical engineering::Chemical processes Perstraction Supported Ionic Liquid Membrane |
| url | https://hdl.handle.net/10356/152175 |
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