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Article: Modeling double-skinned FO membranes

TitleModeling double-skinned FO membranes
Authors
KeywordsDouble Skin
Forward Osmosis (Fo)
Internal Concentration Polarization (Icp)
Selectivity
Solute Permeability
Water Permeability
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/desal
Citation
Desalination, 2011, v. 283, p. 178-186 How to Cite?
AbstractForward osmosis (FO) has attracted wide interest for its many potential applications. Recent developments suggest that double-skinned FO membranes may perform superiorly over conventional single-skinned ones. In this design, a dense rejection skin facing the draw solution is responsible for the separation, while a second skin facing the feed solution is designed to prevent foulants entering into the porous support layer sandwiched between the two skins. For the first time, an analytical model is developed for double-skinned FO membranes and is verified experimentally. Model simulations suggest that an optimal double-skinned membrane shall have a feed skin similar to that of a low rejection nanofiltration membrane to minimize the overall hydraulic resistant and to reduce internal concentration polarization. On the other hand, the optimization of the draw skin calls for a compromise between its water permeability and solute rejection. FO water flux is greater for support layers with higher mass transfer coefficients. In addition, it decreases with decreasing draw solution concentration and increasing feed solution concentration. While membrane orientation plays an important role for applications with low feed solution concentrations (with the denser skin preferentially facing the draw solution), this effect becomes negligible at high feed solution concentrations. © 2011 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/185396
ISSN
2015 Impact Factor: 4.412
2015 SCImago Journal Rankings: 1.549
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorTang, CYen_US
dc.contributor.authorShe, Qen_US
dc.contributor.authorLay, WCLen_US
dc.contributor.authorWang, Ren_US
dc.contributor.authorField, Ren_US
dc.contributor.authorFane, AGen_US
dc.date.accessioned2013-07-30T07:32:13Z-
dc.date.available2013-07-30T07:32:13Z-
dc.date.issued2011en_US
dc.identifier.citationDesalination, 2011, v. 283, p. 178-186en_US
dc.identifier.issn0011-9164en_US
dc.identifier.urihttp://hdl.handle.net/10722/185396-
dc.description.abstractForward osmosis (FO) has attracted wide interest for its many potential applications. Recent developments suggest that double-skinned FO membranes may perform superiorly over conventional single-skinned ones. In this design, a dense rejection skin facing the draw solution is responsible for the separation, while a second skin facing the feed solution is designed to prevent foulants entering into the porous support layer sandwiched between the two skins. For the first time, an analytical model is developed for double-skinned FO membranes and is verified experimentally. Model simulations suggest that an optimal double-skinned membrane shall have a feed skin similar to that of a low rejection nanofiltration membrane to minimize the overall hydraulic resistant and to reduce internal concentration polarization. On the other hand, the optimization of the draw skin calls for a compromise between its water permeability and solute rejection. FO water flux is greater for support layers with higher mass transfer coefficients. In addition, it decreases with decreasing draw solution concentration and increasing feed solution concentration. While membrane orientation plays an important role for applications with low feed solution concentrations (with the denser skin preferentially facing the draw solution), this effect becomes negligible at high feed solution concentrations. © 2011 Elsevier B.V. All rights reserved.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/desalen_US
dc.relation.ispartofDesalinationen_US
dc.subjectDouble Skinen_US
dc.subjectForward Osmosis (Fo)en_US
dc.subjectInternal Concentration Polarization (Icp)en_US
dc.subjectSelectivityen_US
dc.subjectSolute Permeabilityen_US
dc.subjectWater Permeabilityen_US
dc.titleModeling double-skinned FO membranesen_US
dc.typeArticleen_US
dc.identifier.emailTang, CY: tangc@hku.hken_US
dc.identifier.authorityTang, CY=rp01765en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.desal.2011.02.026en_US
dc.identifier.scopuseid_2-s2.0-84856100409en_US
dc.identifier.isiWOS:000299198400026-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridTang, CY=35489259800en_US
dc.identifier.scopusauthoridShe, Q=34868602200en_US
dc.identifier.scopusauthoridLay, WCL=25225504600en_US
dc.identifier.scopusauthoridWang, R=35081334000en_US
dc.identifier.scopusauthoridField, R=55697349100en_US
dc.identifier.scopusauthoridFane, AG=35593963600en_US

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