• high performance zif-8 molecular sieve membrane on hollow ceramic fiber via crystallizing-rubbing seed deposition

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 592
    • تعداد پرسش و پاسخ ها: 0
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     in this report, a continuous well-intergrown zif-8 membrane on hollow ceramic fiber tube was successfully synthesized by a novel crystallizing-rubbing seed deposition. it is shown that the obtained zif-8 membrane was compact and defect-free, with a thickness of about 5 μm. the obtained membrane displayed high h2 molecular sieve separation performance. specifically, the h2 permeance reached an excellent value of 1.1 × 10−6 mol m−2 s−1 pa−1, and the ideal separation factors for h2/co2, h2/n2 and h2/ch4 were calculated to be 5.2, 7.3 and 6.8 at room temperature, respectively. we show that the fine seeds generated by crystallizing-rubbing play the key role for enhancing the heterogeneous nucleation of zif-8 crystals, which thus result in a high quality zif-8 membrane.

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