Double-Skinned Forward Osmosis Membranes for Reducing Internal Concentration Polarization within the Porous Sublayer

Handle URI:
http://hdl.handle.net/10754/598017
Title:
Double-Skinned Forward Osmosis Membranes for Reducing Internal Concentration Polarization within the Porous Sublayer
Authors:
Wang, Kai Yu; Ong, Rui Chin; Chung, Tai-Shung
Abstract:
A scheme to fabricate forward osmosis membranes comprising a highly porous sublayer sandwiched between two selective skin layers via phase inversion was proposed. One severe deficiency of existing composite and asymmetric membranes used in forward osmosis is the presence of unfavorable internal concentration polarization within the porous support layer that hinders both (i) separation (salt flux) and (ii) the performance (water flux). The double skin layers of the tailored membrane may mitigate the internal concentration polarization by preventing the salt and other solutes in the draw solution from penetrating into the membrane porous support. The prototype double-skinned cellulose acetate membrane displayed a water flux of 48.2 L·m-2·h -1 and lower reverse salt transport of 6.5 g·m -2·h-1 using 5.0 M MgCl2 as the draw solution in a forward osmosis process performed at 22 °C. This can be attributed to the effective salt rejection by the double skin layers and the low water transport resistance within the porous support layer. The prospects of utilizing the double-selective layer membranes may have potential application in forward osmosis for desalination. This study may help pave the way to improve the membrane design for the forward osmosis process. © 2010 American Chemical Society.
Citation:
Wang KY, Ong RC, Chung T-S (2010) Double-Skinned Forward Osmosis Membranes for Reducing Internal Concentration Polarization within the Porous Sublayer. Ind Eng Chem Res 49: 4824–4831. Available: http://dx.doi.org/10.1021/ie901592d.
Publisher:
American Chemical Society (ACS)
Journal:
Industrial & Engineering Chemistry Research
Issue Date:
19-May-2010
DOI:
10.1021/ie901592d
Type:
Article
ISSN:
0888-5885; 1520-5045
Sponsors:
The authors would like to thank King Abdullah University of Science and Technology (KAUST), Saudi Arabia, and National University of Singapore (NUS) for funding this research project with Grant Nos. R-279-000-265-597 and R-279-000-265-598. Special thanks are due to Dr. Yang Qian, Ms. Low Bee Ting, Ms. Zhang Jiyuan, and Ms. Zhang Sui for their valuable assistance.
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Full metadata record

DC FieldValue Language
dc.contributor.authorWang, Kai Yuen
dc.contributor.authorOng, Rui Chinen
dc.contributor.authorChung, Tai-Shungen
dc.date.accessioned2016-02-25T13:11:03Zen
dc.date.available2016-02-25T13:11:03Zen
dc.date.issued2010-05-19en
dc.identifier.citationWang KY, Ong RC, Chung T-S (2010) Double-Skinned Forward Osmosis Membranes for Reducing Internal Concentration Polarization within the Porous Sublayer. Ind Eng Chem Res 49: 4824–4831. Available: http://dx.doi.org/10.1021/ie901592d.en
dc.identifier.issn0888-5885en
dc.identifier.issn1520-5045en
dc.identifier.doi10.1021/ie901592den
dc.identifier.urihttp://hdl.handle.net/10754/598017en
dc.description.abstractA scheme to fabricate forward osmosis membranes comprising a highly porous sublayer sandwiched between two selective skin layers via phase inversion was proposed. One severe deficiency of existing composite and asymmetric membranes used in forward osmosis is the presence of unfavorable internal concentration polarization within the porous support layer that hinders both (i) separation (salt flux) and (ii) the performance (water flux). The double skin layers of the tailored membrane may mitigate the internal concentration polarization by preventing the salt and other solutes in the draw solution from penetrating into the membrane porous support. The prototype double-skinned cellulose acetate membrane displayed a water flux of 48.2 L·m-2·h -1 and lower reverse salt transport of 6.5 g·m -2·h-1 using 5.0 M MgCl2 as the draw solution in a forward osmosis process performed at 22 °C. This can be attributed to the effective salt rejection by the double skin layers and the low water transport resistance within the porous support layer. The prospects of utilizing the double-selective layer membranes may have potential application in forward osmosis for desalination. This study may help pave the way to improve the membrane design for the forward osmosis process. © 2010 American Chemical Society.en
dc.description.sponsorshipThe authors would like to thank King Abdullah University of Science and Technology (KAUST), Saudi Arabia, and National University of Singapore (NUS) for funding this research project with Grant Nos. R-279-000-265-597 and R-279-000-265-598. Special thanks are due to Dr. Yang Qian, Ms. Low Bee Ting, Ms. Zhang Jiyuan, and Ms. Zhang Sui for their valuable assistance.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleDouble-Skinned Forward Osmosis Membranes for Reducing Internal Concentration Polarization within the Porous Sublayeren
dc.typeArticleen
dc.identifier.journalIndustrial & Engineering Chemistry Researchen
dc.contributor.institutionNational University of Singapore, Singapore City, Singaporeen
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