Performance evaluation of the DCMD desalination process under bench scale and large scale module operating conditions

Handle URI:
http://hdl.handle.net/10754/563467
Title:
Performance evaluation of the DCMD desalination process under bench scale and large scale module operating conditions
Authors:
Francis, Lijo; Ghaffour, Noreddine ( 0000-0003-2095-4736 ) ; Alsaadi, Ahmad Salem ( 0000-0002-5334-8305 ) ; Nunes, Suzana Pereira ( 0000-0002-3669-138X ) ; Amy, Gary L.
Abstract:
The flux performance of different hydrophobic microporous flat sheet commercial membranes made of poly tetrafluoroethylene (PTFE) and poly propylene (PP) was tested for Red Sea water desalination using the direct contact membrane distillation (DCMD) process, under bench scale (high δT) and large scale module (low δT) operating conditions. Membranes were characterized for their surface morphology, water contact angle, thickness, porosity, pore size and pore size distribution. The DCMD process performance was optimized using a locally designed and fabricated module aiming to maximize the flux at different levels of operating parameters, mainly feed water and coolant inlet temperatures at different temperature differences across the membrane (δT). Water vapor flux of 88.8kg/m2h was obtained using a PTFE membrane at high δT (60°C). In addition, the flux performance was compared to the first generation of a new locally synthesized and fabricated membrane made of a different class of polymer under the same conditions. A total salt rejection of 99.99% and boron rejection of 99.41% were achieved under extreme operating conditions. On the other hand, a detailed water characterization revealed that low molecular weight non-ionic molecules (ppb level) were transported with the water vapor molecules through the membrane structure. The membrane which provided the highest flux was then tested under large scale module operating conditions. The average flux of the latter study (low δT) was found to be eight times lower than that of the bench scale (high δT) operating conditions.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program; Nanostructured Polymeric Membrane Lab
Publisher:
Elsevier BV
Journal:
Journal of Membrane Science
Issue Date:
Apr-2014
DOI:
10.1016/j.memsci.2013.12.033
Type:
Article
ISSN:
03767388
Appears in Collections:
Articles; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorFrancis, Lijoen
dc.contributor.authorGhaffour, Noreddineen
dc.contributor.authorAlsaadi, Ahmad Salemen
dc.contributor.authorNunes, Suzana Pereiraen
dc.contributor.authorAmy, Gary L.en
dc.date.accessioned2016-05-22T07:58:10Z-
dc.date.available2015-08-03T11:52:14Zen
dc.date.available2016-05-22T07:58:10Z-
dc.date.issued2014-04-
dc.identifier.issn03767388-
dc.identifier.doi10.1016/j.memsci.2013.12.033-
dc.identifier.urihttp://hdl.handle.net/10754/563467-
dc.description.abstractThe flux performance of different hydrophobic microporous flat sheet commercial membranes made of poly tetrafluoroethylene (PTFE) and poly propylene (PP) was tested for Red Sea water desalination using the direct contact membrane distillation (DCMD) process, under bench scale (high δT) and large scale module (low δT) operating conditions. Membranes were characterized for their surface morphology, water contact angle, thickness, porosity, pore size and pore size distribution. The DCMD process performance was optimized using a locally designed and fabricated module aiming to maximize the flux at different levels of operating parameters, mainly feed water and coolant inlet temperatures at different temperature differences across the membrane (δT). Water vapor flux of 88.8kg/m2h was obtained using a PTFE membrane at high δT (60°C). In addition, the flux performance was compared to the first generation of a new locally synthesized and fabricated membrane made of a different class of polymer under the same conditions. A total salt rejection of 99.99% and boron rejection of 99.41% were achieved under extreme operating conditions. On the other hand, a detailed water characterization revealed that low molecular weight non-ionic molecules (ppb level) were transported with the water vapor molecules through the membrane structure. The membrane which provided the highest flux was then tested under large scale module operating conditions. The average flux of the latter study (low δT) was found to be eight times lower than that of the bench scale (high δT) operating conditions.en
dc.publisherElsevier BVen
dc.rightsThis is the authors' accepted manuscript version of the article later published in 2014 in the Journal of Membrane Science with the DOI: 10.1016/j.memsci.2013.12.033en
dc.subjectDCMD fluxen
dc.subjectLarge scale module operating conditionsen
dc.subjectMD membranesen
dc.subjectRejectionen
dc.subjectSeawater desalinationen
dc.titlePerformance evaluation of the DCMD desalination process under bench scale and large scale module operating conditionsen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentEnvironmental Science and Engineering Programen
dc.contributor.departmentNanostructured Polymeric Membrane Laben
dc.identifier.journalJournal of Membrane Scienceen
dc.eprint.versionPost-printen
kaust.authorFrancis, Lijoen
kaust.authorGhaffour, Noreddineen
kaust.authorAlsaadi, Ahmad Salemen
kaust.authorNunes, Suzana Pereiraen
kaust.authorAmy, Gary L.en

Version History

VersionItem Editor Date Summary
2 10754/563467grenzdm2016-05-22 08:51:16.0Accepted manuscript received from Noreddine Ghaffour. - DG
1 10754/563467.1grenzdm2015-08-03 12:52:14.0null
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