PREPARATION OF NANO PORE MORDENITE MEMBRANES

Abstract: Nano pore 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 ۲۴ h crystallization time and ۱۷۰ °C crystallization temperature. Effect of gel composition on separation factor and water flux of the water-UDMH mixtures was investigated. X-ray diffraction (XRD) 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-UDMH mixtures, the membrane exhibits a hydrophilic behavior, with a high selectivity towards water and a good flux. The best membranes had a water flux of ۲.۶۷ kg/m۲.h at ۲۷ °C. The best PV selectivity was obtained to be ۲۶۴.

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Keywords: Nano pore Zeolite membrane ، Mordenite ، Pervaporation ، UDMH ، hydrothermal synthesis