Evaluation of hydroacid complex in the forward osmosis–membrane distillation (FO–MD) system for desalination

Handle URI:
http://hdl.handle.net/10754/594232
Title:
Evaluation of hydroacid complex in the forward osmosis–membrane distillation (FO–MD) system for desalination
Authors:
Wang, Peng; Cui, Yue; Ge, Qingchun; Fern Tew, Tjin; Chung, Neal Tai-Shung ( 0000-0003-3704-8609 )
Abstract:
The incorporation of membrane distillation (MD) into forward osmosis (FO) provides process sustainability to regenerate the draw solution and to produce clean water simultaneously. However, the reverse salt flux is the major hurdle in the FO-MD system because it not only reduces the effective osmotic driving force across the membrane but also increases the replenishment cost and scaling issue. For the first time, a hydroacid complex with abundant hydrophilic groups and ionic species is evaluated as the draw solutes in the hybrid FO-MD system consisting of multi-bore PVDF MD membranes for seawater/brackish desalination. In order to evaluate the practicality of the hydroacid complex in the FO-MD system, FO and MD experiments were conducted at elevated temperatures and concentrations. The hydroacid complex has displayed desired properties such as high solubility, low viscosity, excellent thermal stability and minimal reverse salt flux suitable for FO and MD operations. FO-MD desalination process was demonstrated with a highest seawater desalination flux of 6/32 LMH (FO/MD). This study may open up the prospective of employing the hydroacid complex as the draw solute in FO-MD hybrid systems for seawater /brackish desalination. © 2015 Elsevier B.V.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC)
Citation:
Wang P, Cui Y, Ge Q, Fern Tew T, Chung T-S (2015) Evaluation of hydroacid complex in the forward osmosis–membrane distillation (FO–MD) system for desalination. Journal of Membrane Science 494: 1–7. Available: http://dx.doi.org/10.1016/j.memsci.2015.07.022.
Publisher:
Elsevier BV
Journal:
Journal of Membrane Science
Issue Date:
Nov-2015
DOI:
10.1016/j.memsci.2015.07.022
Type:
Article
ISSN:
0376-7388
Sponsors:
National Research Foundation and National University of Singapore[R-279-000-336-281]
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorWang, Pengen
dc.contributor.authorCui, Yueen
dc.contributor.authorGe, Qingchunen
dc.contributor.authorFern Tew, Tjinen
dc.contributor.authorChung, Neal Tai-Shungen
dc.date.accessioned2016-01-19T14:43:57Zen
dc.date.available2016-01-19T14:43:57Zen
dc.date.issued2015-11en
dc.identifier.citationWang P, Cui Y, Ge Q, Fern Tew T, Chung T-S (2015) Evaluation of hydroacid complex in the forward osmosis–membrane distillation (FO–MD) system for desalination. Journal of Membrane Science 494: 1–7. Available: http://dx.doi.org/10.1016/j.memsci.2015.07.022.en
dc.identifier.issn0376-7388en
dc.identifier.doi10.1016/j.memsci.2015.07.022en
dc.identifier.urihttp://hdl.handle.net/10754/594232en
dc.description.abstractThe incorporation of membrane distillation (MD) into forward osmosis (FO) provides process sustainability to regenerate the draw solution and to produce clean water simultaneously. However, the reverse salt flux is the major hurdle in the FO-MD system because it not only reduces the effective osmotic driving force across the membrane but also increases the replenishment cost and scaling issue. For the first time, a hydroacid complex with abundant hydrophilic groups and ionic species is evaluated as the draw solutes in the hybrid FO-MD system consisting of multi-bore PVDF MD membranes for seawater/brackish desalination. In order to evaluate the practicality of the hydroacid complex in the FO-MD system, FO and MD experiments were conducted at elevated temperatures and concentrations. The hydroacid complex has displayed desired properties such as high solubility, low viscosity, excellent thermal stability and minimal reverse salt flux suitable for FO and MD operations. FO-MD desalination process was demonstrated with a highest seawater desalination flux of 6/32 LMH (FO/MD). This study may open up the prospective of employing the hydroacid complex as the draw solute in FO-MD hybrid systems for seawater /brackish desalination. © 2015 Elsevier B.V.en
dc.description.sponsorshipNational Research Foundation and National University of Singapore[R-279-000-336-281]en
dc.publisherElsevier BVen
dc.subjectDraw solutionen
dc.subjectForward osmosisen
dc.subjectHybrid membrane processen
dc.subjectHydroacid complexen
dc.subjectMembrane distillationen
dc.titleEvaluation of hydroacid complex in the forward osmosis–membrane distillation (FO–MD) system for desalinationen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalJournal of Membrane Scienceen
dc.contributor.institutionDepartment of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, Singaporeen
kaust.authorChung, Neal Tai-Shungen
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