Abstract
Polyvinyl alcohol/zeolite NaA mixed-matrix membranes were synthesized on porous mullite as substrate. The membranes were prepared for application in dehydration of ethylene glycol. NaA zeolite was synthesized via a hydrogel with chemical formula of 1 Al2O3:2 SiO2:4 Na2O:200 H2O in molar basis. Hydrothermal method was utilized for synthesis of zeolite. NaA zeolite and mixed-matrix membranes were characterized by means of scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. The performance of as-synthesized hybrid membranes was examined in pervaporation dehydration of ethylene glycol in a cross flow operational mode. Effect of feed temperature on total mass transfer flux of water through the membrane was investigated. The results indicated that increasing temperature results in enhancement of mass transfer flux. The results also revealed that hybrid mixed-matrix membranes are promising for dehydration of ethylene glycol.
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