Desalination 260 (2010) 276
Preparation of mordenite membranes for dehydration of water–UDMH
Toraj Mohammadi ,Mansoor Kazemimoghadam
Research Lab for Separation Processes, Faculty of Chemical Engineering, Iran University of Science and Technology, Narmak, Tehran, Iran
a b s t r a c t
Mordenite membranes were prepared on the outer surface of ceramic tubular tubes via hydrothermal
synthesis and evaluated for dehydration pervaporation of water unsymmetrical dimethylhydrazine UDMH
mixtures. Highly water-selective mordenite membranes were prepared and the optimum reaction condition
was found to be 24 h crystallization time and 170 °C crystallization temperature. Effect of gel composition on
separation factor and water
patterns showed that mordenite is the only zeolite material which presents in the membrane. Morphology of
the supports subjected to crystallization was characterized by Scanning electron microscopy (SEM). In PV of
the water
flux of the water–UDMH mixtures was investigated. X-ray diffraction (XRD)–UDMH mixtures, the membrane exhibits a hydrophilic behavior. The best membranes had a water fl
ux of 2.67 kg/m2h at 30 °C. The best PV selectivity was obtained to be 264.
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