Water vapor permeation and dehumidification performance of poly(vinyl alcohol)/lithium chloride composite membranes
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Type
ArticleKAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionEnvironmental Science and Engineering Program
Water Desalination and Reuse Research Center (WDRC)
Date
2015-10-21Online Publication Date
2015-10-21Print Publication Date
2016-01Permanent link to this record
http://hdl.handle.net/10754/581361
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Thin and robust composite membranes comprising stainless steel scaffold, fine and porous TiO2 and polyvinyl alcohol/lithium chloride were fabricated and studied for air dehumidification application. Higher hydrophilicity, sorption and permeation were observed for membranes with increased lithium chloride content up to 50%. The permeation and sorption properties of the membranes were investigated under different temperatures. The results provided a deeper insight into the membrane water vapor permeation process. It was specifically noted that lithium chloride significantly reduces water diffusion energy barrier, resulting in the change of permeation energy from positive to negative values. Higher water vapor permeance was observed for the membrane with higher LiCl content at lower temperature. The isothermal air dehumidification tests show that the membrane is suitable for dehumidifying air in high humid condition. Additionally, results also indicate a trade-off between the humidity ratio drop with the water vapor removal rate when varying air flowrate.Citation
Water vapor permeation and dehumidification performance of poly(vinyl alcohol)/lithium chloride composite membranes 2016, 498:254 Journal of Membrane SciencePublisher
Elsevier BVJournal
Journal of Membrane ScienceAdditional Links
http://linkinghub.elsevier.com/retrieve/pii/S0376738815302519ae974a485f413a2113503eed53cd6c53
10.1016/j.memsci.2015.10.021