کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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639663 | 1456201 | 2006 | 10 صفحه PDF | دانلود رایگان |
The pervaporation performance of mordenite membranes prepared by seeded hydrothermal synthesis was improved by a new post-synthetic treatment in which the membranes were hydrothermally treated at 180 °C under moderately alkaline conditions. The effect of the post-synthetic treatment was evidenced by pervaporation measurements, X-ray diffraction, scanning electron microscopy and chemical analysis of the solution after treatment. The post-synthetic treatment was found to be highly effective to improve the performance of mordenite membranes in the pervaporation of water/ethanol mixtures. The dissolution of Si-rich amorphous and zeolitic materials, possibly combined with further crystallization processes during post-synthetic treatment are invoked to explain the results obtained.
Journal: Journal of Membrane Science - Volume 270, Issues 1–2, 15 February 2006, Pages 32–41