Reconcentrating the Ionic Liquid EMIM-HSO<sub>4</sub> Using Direct Contact Membrane Distillation
Adequate water supplies are crucial for missions to the Moon, since water is essential for astronauts’ health. Ionic liquids (ILs) have been investigated for processing metal oxides, the main components of lunar regolith, to separate oxygen and metals. The IL must be diluted in the process. Recyclin...
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MDPI AG
2025-01-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/30/2/211 |
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| author | Mark J. Wong Viral Sagar Joan G. Lynam |
| author_facet | Mark J. Wong Viral Sagar Joan G. Lynam |
| author_sort | Mark J. Wong |
| collection | DOAJ |
| description | Adequate water supplies are crucial for missions to the Moon, since water is essential for astronauts’ health. Ionic liquids (ILs) have been investigated for processing metal oxides, the main components of lunar regolith, to separate oxygen and metals. The IL must be diluted in the process. Recycling this diluted IL post-processing is important to reduce the materials required in resupply missions. In addition, water will be needed in lunar greenhouses for growing food and aiding in sustaining a habitable environment. Direct contact membrane distillation (DCMD) is a new technology for water purification that was examined in this study for its feasibility to concentrate IL. Hydrophobic membranes composed of polytetrafluoroethylene (PTFE) and polyvinylidene (PVDF) were found to hold promise in separating solutes from water to concentrate a diluted IL solution and to recover water. A bench-scale DCMD system was employed to test this method at temperatures of 50 °C, 65 °C, and 80 °C. Hence, the benefits and limitations of DCMD with PTFE and PVDF membranes were explored for the aqueous IL 1-ethyl-3 methylimidazolium hydrogen sulfate for DCMD performed at different temperatures. |
| format | Article |
| id | doaj-art-8217af28d95f4acbaacfab9dab15ac48 |
| institution | Kabale University |
| issn | 1420-3049 |
| language | English |
| publishDate | 2025-01-01 |
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| series | Molecules |
| spelling | doaj-art-8217af28d95f4acbaacfab9dab15ac482025-01-24T13:43:07ZengMDPI AGMolecules1420-30492025-01-0130221110.3390/molecules30020211Reconcentrating the Ionic Liquid EMIM-HSO<sub>4</sub> Using Direct Contact Membrane DistillationMark J. Wong0Viral Sagar1Joan G. Lynam2Department of Chemical Engineering, Louisiana Tech University, 600 Dan Reneau Drive, P.O. Box 10348, Ruston, LA 71272, USADepartment of Chemical Engineering, Louisiana Tech University, 600 Dan Reneau Drive, P.O. Box 10348, Ruston, LA 71272, USADepartment of Chemical Engineering, Louisiana Tech University, 600 Dan Reneau Drive, P.O. Box 10348, Ruston, LA 71272, USAAdequate water supplies are crucial for missions to the Moon, since water is essential for astronauts’ health. Ionic liquids (ILs) have been investigated for processing metal oxides, the main components of lunar regolith, to separate oxygen and metals. The IL must be diluted in the process. Recycling this diluted IL post-processing is important to reduce the materials required in resupply missions. In addition, water will be needed in lunar greenhouses for growing food and aiding in sustaining a habitable environment. Direct contact membrane distillation (DCMD) is a new technology for water purification that was examined in this study for its feasibility to concentrate IL. Hydrophobic membranes composed of polytetrafluoroethylene (PTFE) and polyvinylidene (PVDF) were found to hold promise in separating solutes from water to concentrate a diluted IL solution and to recover water. A bench-scale DCMD system was employed to test this method at temperatures of 50 °C, 65 °C, and 80 °C. Hence, the benefits and limitations of DCMD with PTFE and PVDF membranes were explored for the aqueous IL 1-ethyl-3 methylimidazolium hydrogen sulfate for DCMD performed at different temperatures.https://www.mdpi.com/1420-3049/30/2/2111-ethyl-3 methylimidazolium hydrogen sulfateDCMDpolytetrafluoroethylenepolyvinylideneconductivityUV-vis |
| spellingShingle | Mark J. Wong Viral Sagar Joan G. Lynam Reconcentrating the Ionic Liquid EMIM-HSO<sub>4</sub> Using Direct Contact Membrane Distillation Molecules 1-ethyl-3 methylimidazolium hydrogen sulfate DCMD polytetrafluoroethylene polyvinylidene conductivity UV-vis |
| title | Reconcentrating the Ionic Liquid EMIM-HSO<sub>4</sub> Using Direct Contact Membrane Distillation |
| title_full | Reconcentrating the Ionic Liquid EMIM-HSO<sub>4</sub> Using Direct Contact Membrane Distillation |
| title_fullStr | Reconcentrating the Ionic Liquid EMIM-HSO<sub>4</sub> Using Direct Contact Membrane Distillation |
| title_full_unstemmed | Reconcentrating the Ionic Liquid EMIM-HSO<sub>4</sub> Using Direct Contact Membrane Distillation |
| title_short | Reconcentrating the Ionic Liquid EMIM-HSO<sub>4</sub> Using Direct Contact Membrane Distillation |
| title_sort | reconcentrating the ionic liquid emim hso sub 4 sub using direct contact membrane distillation |
| topic | 1-ethyl-3 methylimidazolium hydrogen sulfate DCMD polytetrafluoroethylene polyvinylidene conductivity UV-vis |
| url | https://www.mdpi.com/1420-3049/30/2/211 |
| work_keys_str_mv | AT markjwong reconcentratingtheionicliquidemimhsosub4subusingdirectcontactmembranedistillation AT viralsagar reconcentratingtheionicliquidemimhsosub4subusingdirectcontactmembranedistillation AT joanglynam reconcentratingtheionicliquidemimhsosub4subusingdirectcontactmembranedistillation |