Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/89501
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dc.titleMorphological architecture of dual-layer hollow fiber for membrane distillation with higher desalination performance
dc.contributor.authorWang, P.
dc.contributor.authorTeoh, M.M.
dc.contributor.authorChung, T.-S.
dc.date.accessioned2014-10-09T06:54:29Z
dc.date.available2014-10-09T06:54:29Z
dc.date.issued2011-11-01
dc.identifier.citationWang, P., Teoh, M.M., Chung, T.-S. (2011-11-01). Morphological architecture of dual-layer hollow fiber for membrane distillation with higher desalination performance. Water Research 45 (17) : 5489-5500. ScholarBank@NUS Repository.
dc.identifier.issn00431354
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/89501
dc.description.abstractA new strategy to enhance the desalination performance of polyvinylidene fluoride (PVDF) hollow fiber membrane for membrane distillation (MD) via architecture of morphological characteristics is explored in this study. It is proposed that a dual-layer hollow fiber consisting of a fully finger-like macrovoid inner-layer and a sponge-like outer-layer may effectively enhance the permeation flux while maintaining the wetting resistance. Dual-layer fibers with the proposed morphology have been fabricated by the dry-jet wet spinning process via careful choice of dopes composition and coagulation conditions. In addition to high energy efficiency (EE) of 94%, a superior flux of 98.6 L m -2 h -1 is obtained during the direct contact membrane distillation (DCMD) desalination experiments. Moreover, the liquid entry pressure (LEP) and long-term DCMD performance test show high wetting resistance and long-term stability. Mathematical modeling has been conducted to investigate the membrane mass transfer properties in terms of temperature profile and apparent diffusivity of the membranes. It is concluded that the enhancement in permeation flux arises from the coupling effect of two mechanisms; namely, a higher driving force and a lower mass transfer resistance, while the later is the major contribution. This work provides an insight on MD fundamentals and strategy to tailor making ideal membranes for DCMD application in desalination industry. © 2011 Elsevier Ltd.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.watres.2011.08.012
dc.sourceScopus
dc.subjectFully sponge-like structure
dc.subjectHeat and mass transfer model
dc.subjectLiquid entry pressure
dc.subjectMembrane distillation
dc.subjectUniform finger-like macrovoids
dc.typeArticle
dc.contributor.departmentCHEMICAL & BIOMOLECULAR ENGINEERING
dc.description.sourcetitleWater Research
dc.description.volume45
dc.description.issue17
dc.description.page5489-5500
dc.description.codenWATRA
dc.identifier.isiut000295894600014
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