File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Effect of feed spacer induced membrane deformation on the performance of pressure retarded osmosis (PRO): Implications for PRO process operation

TitleEffect of feed spacer induced membrane deformation on the performance of pressure retarded osmosis (PRO): Implications for PRO process operation
Authors
KeywordsFeed Spacer
Membrane Deformation
Osmotic Power
Pressure Retarded Osmosis (Pro)
Reverse Solute Diffusion
Issue Date2013
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci
Citation
Journal Of Membrane Science, 2013, v. 445, p. 170-182 How to Cite?
AbstractPressure retarded osmosis (PRO) is a promising technology for extracting renewable salinity-gradient energy. However, its performance can be significantly influenced by membrane deformation at the high applied pressures when feed spacers are used in the operation. This study systematically investigated the effect of feed spacer geometry on membrane deformation and the resulted PRO performance. It was observed that feed spacers with larger openings induced more severe membrane deformation at higher applied pressures. A theoretical mechanical model further reveals that the extent of membrane deformation is proportional to the applied pressure and the square of the opening size of the feed spacer and inversely proportional to the membrane mechanical strength. Moreover, a modified RO method was developed to measure the separation properties (i.e., the water permeability (A value), solute permeability (B value) and solute/water selectivity (B/A value)) of the deformed membrane. The measured A, B and B/A values increased with the extent of the membrane deformation. It was further found that the severe membrane deformation not only drastically reduced the PRO water fluxes but also substantially increased the hydraulic pressure loss in the feed flow channel. For feed spacers with large openings, the reduced PRO water fluxes together with the increased pumping need for feed flow severely decreased the net power output. In contrast, the use of feed spacers with small openings resulted in significant improvement of PRO performance. In the current study, the use of commercial RO permeate carrier as the PRO feed spacer (opening ratio ~0.35) lead to a significantly enhanced power density of 5.8W/m2 at the optimal applied pressure of 17.2bar due to the minimized membrane deformation. The current study can provide important implications for PRO studies. © 2013 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/185451
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.authorHou, Den_US
dc.contributor.authorLiu, Jen_US
dc.contributor.authorTan, KHen_US
dc.contributor.authorTang, CYen_US
dc.date.accessioned2013-07-30T07:32:40Z-
dc.date.available2013-07-30T07:32:40Z-
dc.date.issued2013en_US
dc.identifier.citationJournal Of Membrane Science, 2013, v. 445, p. 170-182en_US
dc.identifier.issn0376-7388en_US
dc.identifier.urihttp://hdl.handle.net/10722/185451-
dc.description.abstractPressure retarded osmosis (PRO) is a promising technology for extracting renewable salinity-gradient energy. However, its performance can be significantly influenced by membrane deformation at the high applied pressures when feed spacers are used in the operation. This study systematically investigated the effect of feed spacer geometry on membrane deformation and the resulted PRO performance. It was observed that feed spacers with larger openings induced more severe membrane deformation at higher applied pressures. A theoretical mechanical model further reveals that the extent of membrane deformation is proportional to the applied pressure and the square of the opening size of the feed spacer and inversely proportional to the membrane mechanical strength. Moreover, a modified RO method was developed to measure the separation properties (i.e., the water permeability (A value), solute permeability (B value) and solute/water selectivity (B/A value)) of the deformed membrane. The measured A, B and B/A values increased with the extent of the membrane deformation. It was further found that the severe membrane deformation not only drastically reduced the PRO water fluxes but also substantially increased the hydraulic pressure loss in the feed flow channel. For feed spacers with large openings, the reduced PRO water fluxes together with the increased pumping need for feed flow severely decreased the net power output. In contrast, the use of feed spacers with small openings resulted in significant improvement of PRO performance. In the current study, the use of commercial RO permeate carrier as the PRO feed spacer (opening ratio ~0.35) lead to a significantly enhanced power density of 5.8W/m2 at the optimal applied pressure of 17.2bar due to the minimized membrane deformation. The current study can provide important implications for PRO studies. © 2013 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.subjectFeed Spaceren_US
dc.subjectMembrane Deformationen_US
dc.subjectOsmotic Poweren_US
dc.subjectPressure Retarded Osmosis (Pro)en_US
dc.subjectReverse Solute Diffusionen_US
dc.titleEffect of feed spacer induced membrane deformation on the performance of pressure retarded osmosis (PRO): Implications for PRO process operationen_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.2013.05.061en_US
dc.identifier.scopuseid_2-s2.0-84880363033en_US
dc.identifier.hkuros231343-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84880363033&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume445en_US
dc.identifier.spage170en_US
dc.identifier.epage182en_US
dc.identifier.isiWOS:000323024100020-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridShe, Q=34868602200en_US
dc.identifier.scopusauthoridHou, D=55797422800en_US
dc.identifier.scopusauthoridLiu, J=55797239600en_US
dc.identifier.scopusauthoridTan, KH=55797734800en_US
dc.identifier.scopusauthoridTang, CY=35489259800en_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats