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dc.contributor.authorAlsaadi, Ahmad Salem
dc.contributor.authorFrancis, Lijo
dc.contributor.authorMaab, Husnul
dc.contributor.authorAmy, Gary L.
dc.contributor.authorGhaffour, NorEddine
dc.identifier.citationAhmad S. Alsaadi, Lijo Francis, Husnul Maab, Gary L. Amy, Noreddine Ghaffour, Evaluation of air gap membrane distillation process running under sub-atmospheric conditions: Experimental and simulation studies, Journal of Membrane Science,
dc.description.abstractThe importance of removing non-condensable gases from air gap membrane distillation (AGMD) modules in improving the water vapor flux is presented in this paper. Additionally, a previously developed AGMD mathematical model is used to predict to the degree of flux enhancement under sub-atmospheric pressure conditions. Since the mathematical model prediction is expected to be very sensitive to membrane distillation (MD) membrane resistance when the mass diffusion resistance is eliminated, the permeability of the membrane was carefully measured with two different methods (gas permeance test and vacuum MD permeability test). The mathematical model prediction was found to highly agree with the experimental data, which showed that the removal of non-condensable gases increased the flux by more than three-fold when the gap pressure was maintained at the saturation pressure of the feed temperature. The importance of staging the sub-atmospheric AGMD process and how this could give better control over the gap pressure as the feed temperature decreases are also highlighted in this paper. The effect of staging on the sub-atmospheric AGMD flux and its relation to membrane capital cost are briefly discussed.
dc.publisherElsevier BV
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, 16 April 2015. DOI: 10.1016/j.memsci.2015.04.008
dc.subjectMembrane distillation (MD)
dc.subjectAir gap width
dc.subjectHeat and mass transfer coefficients
dc.subjectSub-atmospheric pressure
dc.subjectGas permeance
dc.titleEvaluation of air gap membrane distillation process running under sub-atmospheric conditions: Experimental and simulation studies
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalJournal of Membrane Science
kaust.personAlsaadi, Ahmad Salem
kaust.personFrancis, Lijo
kaust.personMaab, Husnul
kaust.personAmy, Gary L.
kaust.personGhaffour, Noreddine

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