• pervaporation dehydration of ethylene glycol by naa zeolite membranes

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
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     home-made naa zeolite membranes were used for pervaporation dehydration of ethylene glycol (eg)/water mixtures. hydrothermal stability of the membranes in pervaporation was investigated for industrial application purpose. the membranes exhibited good stability for water content of less than 20 wt.% at 100 °c. the reduction of operating temperature was effective to improve membrane stability for operating at high feed water content (e.g. 30 wt.%). the influence of feed water content and operating temperature on dehydration of eg was extensively investigated. a permeation flux of 4.03 kg m−2 h−1 with separation factor of >5000 was achieved at 120 °c for the separation of the solution with 20 wt.% water content. a pilot-scale pervaporation facility with membrane area of 3 m2 was built up for dehydration of eg with the water content of 20 wt.%, which showed technical feasibility for industrial application.

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