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Article: Osmotic power production from salinity gradient resource by pressure retarded osmosis: Effects of operating conditions and reverse solute diffusion

TitleOsmotic power production from salinity gradient resource by pressure retarded osmosis: Effects of operating conditions and reverse solute diffusion
Authors
KeywordsForward Osmosis (Fo)
Internal Concentration Polarization (Icp)
Modeling
Power Density
Pressure Retarded Osmosis (Pro)
Reverse Solute Diffusion Enhanced Icp
Issue Date2012
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci
Citation
Journal Of Membrane Science, 2012, v. 401-402, p. 262-273 How to Cite?
AbstractPressure retarded osmosis (PRO) is a potential technology to harvest the renewable osmotic power from the salinity-gradient resources. This study systematically investigated the effects of operating conditions (feed and draw solution concentration, membrane type, membrane orientation, and temperature) and reverse solute diffusion on PRO performance using commercially available osmotic membranes. The PRO performance was improved by decreasing the feed solution concentration, increasing the draw solution concentration, orientating the membrane with active layer facing draw solution (AL-DS), and increasing temperature. The membrane with higher water permeability, lower solute permeability and lower structure parameter performed better in PRO process. However, the experimentally obtained power densities for all the membranes used in this study were lower than the predictions from conventional ICP model that assumes membrane separation parameters are constant in PRO process. It was found that this was mainly caused by the severe reverse solute diffusion and thus the enhanced internal concentration polarization (ICP) in PRO. The specific reverse solute flux was found to increase with increasing the applied hydraulic pressure, but the increase of experimental results was much more drastic than the theoretic prediction especially under higher hydraulic pressure, probably due to the increased solute permeability caused by membrane deformation. © 2012 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/185418
ISSN
2015 Impact Factor: 5.557
2015 SCImago Journal Rankings: 2.042
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorShe, Qen_US
dc.contributor.authorJin, Xen_US
dc.contributor.authorTang, CYen_US
dc.date.accessioned2013-07-30T07:32:23Z-
dc.date.available2013-07-30T07:32:23Z-
dc.date.issued2012en_US
dc.identifier.citationJournal Of Membrane Science, 2012, v. 401-402, p. 262-273en_US
dc.identifier.issn0376-7388en_US
dc.identifier.urihttp://hdl.handle.net/10722/185418-
dc.description.abstractPressure retarded osmosis (PRO) is a potential technology to harvest the renewable osmotic power from the salinity-gradient resources. This study systematically investigated the effects of operating conditions (feed and draw solution concentration, membrane type, membrane orientation, and temperature) and reverse solute diffusion on PRO performance using commercially available osmotic membranes. The PRO performance was improved by decreasing the feed solution concentration, increasing the draw solution concentration, orientating the membrane with active layer facing draw solution (AL-DS), and increasing temperature. The membrane with higher water permeability, lower solute permeability and lower structure parameter performed better in PRO process. However, the experimentally obtained power densities for all the membranes used in this study were lower than the predictions from conventional ICP model that assumes membrane separation parameters are constant in PRO process. It was found that this was mainly caused by the severe reverse solute diffusion and thus the enhanced internal concentration polarization (ICP) in PRO. The specific reverse solute flux was found to increase with increasing the applied hydraulic pressure, but the increase of experimental results was much more drastic than the theoretic prediction especially under higher hydraulic pressure, probably due to the increased solute permeability caused by membrane deformation. © 2012 Elsevier B.V.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memscien_US
dc.relation.ispartofJournal of Membrane Scienceen_US
dc.subjectForward Osmosis (Fo)en_US
dc.subjectInternal Concentration Polarization (Icp)en_US
dc.subjectModelingen_US
dc.subjectPower Densityen_US
dc.subjectPressure Retarded Osmosis (Pro)en_US
dc.subjectReverse Solute Diffusion Enhanced Icpen_US
dc.titleOsmotic power production from salinity gradient resource by pressure retarded osmosis: Effects of operating conditions and reverse solute diffusionen_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.memsci.2012.02.014en_US
dc.identifier.scopuseid_2-s2.0-84858446881en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84858446881&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume401-402en_US
dc.identifier.spage262en_US
dc.identifier.epage273en_US
dc.identifier.isiWOS:000301932400030-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridShe, Q=34868602200en_US
dc.identifier.scopusauthoridJin, X=7402589561en_US
dc.identifier.scopusauthoridTang, CY=35489259800en_US

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