Outer-selective thin film composite (TFC) hollow fiber membranes for osmotic power generation

Handle URI:
http://hdl.handle.net/10754/593681
Title:
Outer-selective thin film composite (TFC) hollow fiber membranes for osmotic power generation
Authors:
Le, Ngoc Lieu ( 0000-0002-4634-7267 ) ; Bettahalli Narasimha, Murthy Srivatsa ( 0000-0001-8605-0241 ) ; Nunes, Suzana Pereira ( 0000-0002-3669-138X ) ; Chung, Neal Tai-Shung ( 0000-0003-3704-8609 )
Abstract:
The pressure-retarded osmosis (PRO) process is a green technique for power generation to respond the world's need of energy sustainability. In this study, we have developed the vital component of the process, i.e. membrane, in the configuration of the outer-selective thin-film composite (TFC) hollow fiber, which is more practical than other configurations in the real applications. The support layer morphology and the formation of the selective polyamide layer have been optimized for a good PRO performance. The results show that the bore fluid with higher amount of the solvent N-methyl-2-pyrrolidone leads to full finger-like hollow fibers, which provide higher flux but lower pressure tolerance. The addition of higher amount of diethylene glycol into the dope solution, improves the pore formation and suppresses the macrovoid formation, while properly lowering the take-up speed increases their wall thickness and pressure tolerance. A simple alcohol-pre-wetting approach on the fiber support leads to a smooth and thin polyamide layer, which is favorable for a high water flux and power density. Its efficiency follows this order: n-propanol>ethanol>methanol>water. The n-propanol pre-wetted TFC membrane can tolerate 17 bar with a peak power density of 9.59 W/m2 at room temperature, using 1 M NaCl solution as the draw solution and DI water as feed. This work demonstrates the potential of outer-selective TFC hollow fiber membranes for energy conversion via PRO process, provides useful database to fabricate suitable support morphology and raise a simple technique to practically form a thin and smooth polyamide layer.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division
Citation:
Outer-selective thin film composite (TFC) hollow fiber membranes for osmotic power generation 2016 Journal of Membrane Science
Publisher:
Elsevier BV
Journal:
Journal of Membrane Science
Issue Date:
14-Jan-2016
DOI:
10.1016/j.memsci.2016.01.027
Type:
Article
ISSN:
03767388
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S0376738816300242
Appears in Collections:
Articles; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorLe, Ngoc Lieuen
dc.contributor.authorBettahalli Narasimha, Murthy Srivatsaen
dc.contributor.authorNunes, Suzana Pereiraen
dc.contributor.authorChung, Neal Tai-Shungen
dc.date.accessioned2016-01-18T08:16:28Zen
dc.date.available2016-01-18T08:16:28Zen
dc.date.issued2016-01-14en
dc.identifier.citationOuter-selective thin film composite (TFC) hollow fiber membranes for osmotic power generation 2016 Journal of Membrane Scienceen
dc.identifier.issn03767388en
dc.identifier.doi10.1016/j.memsci.2016.01.027en
dc.identifier.urihttp://hdl.handle.net/10754/593681en
dc.description.abstractThe pressure-retarded osmosis (PRO) process is a green technique for power generation to respond the world's need of energy sustainability. In this study, we have developed the vital component of the process, i.e. membrane, in the configuration of the outer-selective thin-film composite (TFC) hollow fiber, which is more practical than other configurations in the real applications. The support layer morphology and the formation of the selective polyamide layer have been optimized for a good PRO performance. The results show that the bore fluid with higher amount of the solvent N-methyl-2-pyrrolidone leads to full finger-like hollow fibers, which provide higher flux but lower pressure tolerance. The addition of higher amount of diethylene glycol into the dope solution, improves the pore formation and suppresses the macrovoid formation, while properly lowering the take-up speed increases their wall thickness and pressure tolerance. A simple alcohol-pre-wetting approach on the fiber support leads to a smooth and thin polyamide layer, which is favorable for a high water flux and power density. Its efficiency follows this order: n-propanol>ethanol>methanol>water. The n-propanol pre-wetted TFC membrane can tolerate 17 bar with a peak power density of 9.59 W/m2 at room temperature, using 1 M NaCl solution as the draw solution and DI water as feed. This work demonstrates the potential of outer-selective TFC hollow fiber membranes for energy conversion via PRO process, provides useful database to fabricate suitable support morphology and raise a simple technique to practically form a thin and smooth polyamide layer.en
dc.language.isoenen
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0376738816300242en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Journal of Membrane Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Membrane Science, 14 January 2016. DOI: 10.1016/j.memsci.2016.01.027en
dc.subjectOuter-selectiveen
dc.subjectHollow fiber membraneen
dc.subjectPressure-retarded osmosisen
dc.subjectWettingen
dc.titleOuter-selective thin film composite (TFC) hollow fiber membranes for osmotic power generationen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.identifier.journalJournal of Membrane Scienceen
dc.eprint.versionPost-printen
dc.contributor.institutionDepartment of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singaporeen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorLe, Ngoc Lieuen
kaust.authorBettahalli Narasimha, Murthy Srivatsaen
kaust.authorNunes, Suzana Pereiraen
kaust.authorChung, Neal Tai-Shungen
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