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Characteristic and performance of polyvinylidene fluoride membranes blended with lithium chloride in direct contact membrane distillation

Lai, Soon Onn and Chong, Kok Chung and Lee, K. M. and Lau, Woei Jye and Ooi, B. S. (2014) Characteristic and performance of polyvinylidene fluoride membranes blended with lithium chloride in direct contact membrane distillation. Jurnal Teknologi (Sciences and Engineering), 69 (9). pp. 93-97. ISSN 0127-9696

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Official URL: http://dx.doi.org/10.11113/jt.v69.3404

Abstract

Membrane distillation (MD) is one of the recent rising membrane separation techniques adopted in the desalination and wastewater treatment. Unlike other pressure-driven separation processes such as reverse osmosis and nanofiltration, MD is a thermal-driven process which involves vapor pressure difference across the feed and permeates solutions. As such, MD requires low energy consumption. Hydrophobic polymeric materials such as polyvinylidene fluoride (PVDF) are frequently used in direct contact membrane distillation (DCMD) due to low surface energy and promising thermal resistance. In this study, the DCMD hollow fiber membranes were separately prepared with PVDF and PVDF blended with lithium chloride (LiCl) through dry/wet phase inversion method. Subsequently, the membranes were used in a DCMD process to remove sodium chloride (NaCl) under different feed inlet temperatures to examine the effect of LiCl additives on the neat membrane. The result showed that by adding LiCl into the neat membrane solution, the finger-like structure was change to a sponge-like structure with microvoids. Furthermore, the performance of the LiCl additive membrane in term of permeate flux was found to be 20% higher compared to that of the neat membrane. Other results of the membrane characteristics were also discussed

Item Type:Article
Uncontrolled Keywords:membrane distillation, lithium chloride, rejection, permeate flux
Subjects:T Technology > TN Mining engineering. Metallurgy
Divisions:Petroleum and Renewable Energy Engineering
ID Code:52087
Deposited By: Siti Nor Hashidah Zakaria
Deposited On:01 Feb 2016 11:52
Last Modified:29 Aug 2018 16:26

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