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Abstract
We describe the performance of graphene oxide (GO) membranes stabilized by crosslinkers and supported on polyethersulfone films in the dehydration of ethanol in a continuous cross-flow pervaporation set-up. We used two crosslinker species with branched structures (humic acid-like substances derived from urban waste and a synthetic hyperbranched polyol). The supported crosslinked GO films were prepared by rod coating on a polyethersulfone ultrafiltration membrane. Pervaporation experiments were carried out at temperatures of 40, 50, 60 and 70 °C. When the feed comprised pure water and ethanol, a much higher flux of water than ethanol was observed at all temperatures through GO films stabilized by the two crosslinkers (humic acid, GO-HAL, and the synthetic hyperbranched polyol, GO-HBPO), indicating the separation ability of these crosslinked membranes. For feed mixtures of water and ethanol, the GO-HAL and GO-HBPO membranes showed good separation performances by producing permeates with a significantly higher water content than the feed at all temperatures.
Original language | English |
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Article number | 1571 |
Journal | Nanomaterials |
Volume | 10 |
Issue number | 8 |
Pages (from-to) | 1-12 |
Number of pages | 12 |
ISSN | 2079-4991 |
DOIs | |
Publication status | Published - Aug 2020 |
Keywords
- Azeotrope
- Biofuel
- Graphene oxide
- Membrane
- Pervaporation
- Separation
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