Crosslinked PEG and PEBAX Membranes for Concurrent Permeation of Water and Carbon Dioxide
Membrane technology can be used for both post combustion carbon dioxide capture and acidic gas sweetening and dehydration of natural gas. These processes are especially suited for polymeric membranes with polyether functionality, because of the high affinity of this species for both H2O and CO2. Her...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2015-12-01
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| Series: | Membranes |
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| Online Access: | http://www.mdpi.com/2077-0375/6/1/1 |
| _version_ | 1827841621768536064 |
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| author | Colin A. Scholes George Q. Chen Hiep T. Lu Sandra E. Kentish |
| author_facet | Colin A. Scholes George Q. Chen Hiep T. Lu Sandra E. Kentish |
| author_sort | Colin A. Scholes |
| collection | DOAJ |
| description | Membrane technology can be used for both post combustion carbon dioxide capture and acidic gas sweetening and dehydration of natural gas. These processes are especially suited for polymeric membranes with polyether functionality, because of the high affinity of this species for both H2O and CO2. Here, both crosslinked polyethylene glycol diacrylate and a polyether-polyamide block copolymer (PEBAX 2533©) are studied for their ability to separate CO2 from CH4 and N2 under single and mixed gas conditions, for both dry and wet feeds, as well as when 500 ppm H2S is present. The solubility of gases within these polymers is shown to be better correlated with the Lennard Jones well depth than with critical temperature. Under dry mixed gas conditions, CO2 permeability is reduced compared to the single gas measurement because of competitive sorption from CH4 or N2. However, selectivity for CO2 is retained in both polymers. The presence of water in the feed is observed to swell the PEG membrane resulting in a significant increase in CO2 permeability relative to the dry gas scenario. Importantly, the selectivity is again retained under wet feed gas conditions. The presence of H2S is observed to only slightly reduce CO2 permeability through both membranes. |
| first_indexed | 2024-03-12T07:55:09Z |
| format | Article |
| id | doaj.art-ad1362b74aeb428292970918e078fafc |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-12T07:55:09Z |
| publishDate | 2015-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-ad1362b74aeb428292970918e078fafc2023-09-02T20:21:32ZengMDPI AGMembranes2077-03752015-12-0161110.3390/membranes6010001membranes6010001Crosslinked PEG and PEBAX Membranes for Concurrent Permeation of Water and Carbon DioxideColin A. Scholes0George Q. Chen1Hiep T. Lu2Sandra E. Kentish3Peter Cook Centre for Carbon Capture and Storage Research, Department of Chemical & Biomolecular Engineering, The University of Melbourne, Melbourne VIC 3010, AustraliaPeter Cook Centre for Carbon Capture and Storage Research, Department of Chemical & Biomolecular Engineering, The University of Melbourne, Melbourne VIC 3010, AustraliaPeter Cook Centre for Carbon Capture and Storage Research, Department of Chemical & Biomolecular Engineering, The University of Melbourne, Melbourne VIC 3010, AustraliaPeter Cook Centre for Carbon Capture and Storage Research, Department of Chemical & Biomolecular Engineering, The University of Melbourne, Melbourne VIC 3010, AustraliaMembrane technology can be used for both post combustion carbon dioxide capture and acidic gas sweetening and dehydration of natural gas. These processes are especially suited for polymeric membranes with polyether functionality, because of the high affinity of this species for both H2O and CO2. Here, both crosslinked polyethylene glycol diacrylate and a polyether-polyamide block copolymer (PEBAX 2533©) are studied for their ability to separate CO2 from CH4 and N2 under single and mixed gas conditions, for both dry and wet feeds, as well as when 500 ppm H2S is present. The solubility of gases within these polymers is shown to be better correlated with the Lennard Jones well depth than with critical temperature. Under dry mixed gas conditions, CO2 permeability is reduced compared to the single gas measurement because of competitive sorption from CH4 or N2. However, selectivity for CO2 is retained in both polymers. The presence of water in the feed is observed to swell the PEG membrane resulting in a significant increase in CO2 permeability relative to the dry gas scenario. Importantly, the selectivity is again retained under wet feed gas conditions. The presence of H2S is observed to only slightly reduce CO2 permeability through both membranes.http://www.mdpi.com/2077-0375/6/1/1carbon dioxide capturepoly ethylene glycolPEBAXcarbon dioxidewaterLennard Jonessolubility |
| spellingShingle | Colin A. Scholes George Q. Chen Hiep T. Lu Sandra E. Kentish Crosslinked PEG and PEBAX Membranes for Concurrent Permeation of Water and Carbon Dioxide Membranes carbon dioxide capture poly ethylene glycol PEBAX carbon dioxide water Lennard Jones solubility |
| title | Crosslinked PEG and PEBAX Membranes for Concurrent Permeation of Water and Carbon Dioxide |
| title_full | Crosslinked PEG and PEBAX Membranes for Concurrent Permeation of Water and Carbon Dioxide |
| title_fullStr | Crosslinked PEG and PEBAX Membranes for Concurrent Permeation of Water and Carbon Dioxide |
| title_full_unstemmed | Crosslinked PEG and PEBAX Membranes for Concurrent Permeation of Water and Carbon Dioxide |
| title_short | Crosslinked PEG and PEBAX Membranes for Concurrent Permeation of Water and Carbon Dioxide |
| title_sort | crosslinked peg and pebax membranes for concurrent permeation of water and carbon dioxide |
| topic | carbon dioxide capture poly ethylene glycol PEBAX carbon dioxide water Lennard Jones solubility |
| url | http://www.mdpi.com/2077-0375/6/1/1 |
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