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dc.contributor.authorFrancis, Lijo
dc.contributor.authorGhaffour, NorEddine
dc.contributor.authorAlsaadi, Ahmad Salem
dc.contributor.authorNunes, Suzana Pereira
dc.contributor.authorAmy, Gary L.
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.
dc.publisherElsevier BV
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.2013.12.033
dc.subjectDCMD flux
dc.subjectLarge scale module operating conditions
dc.subjectMD membranes
dc.subjectSeawater desalination
dc.titlePerformance evaluation of the DCMD desalination process under bench scale and large scale module operating conditions
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentNanostructured Polymeric Membrane Lab
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalJournal of Membrane Science
kaust.personFrancis, Lijo
kaust.personGhaffour, Noreddine
kaust.personAlsaadi, Ahmad Salem
kaust.personNunes, Suzana Pereira
kaust.personAmy, Gary L.

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