A simple embedded-seeding method to prepare silicalite-1 membrane on porous α-Al2O3 hollow fibers
A simple embedded-seeding method to prepare silicalite-1 membrane on porous α-Al2O3 hollow fibers
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DOI：
10.1016/j.matlet.2017.02.034
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发表时间：
2017-05
影响因子：
3
通讯作者：
Mingyong Sun;Xiaobin Wang;Bo Meng;X. Tan;Shaomin Liu
中科院分区：
文献类型：
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作者：
Mingyong Sun;Xiaobin Wang;Bo Meng;X. Tan;Shaomin Liu
采用一种新型的包埋晶种法在陶瓷中空纤维外表面成功制备了高质量的silicalite-1膜。采用XRD、SEM和气体渗透试验对样品进行了表征。结果表明，所制得的silicalite-1膜致密连续，膜厚约4-5 μm。silicalite-1膜的H2和N2透过率分别为8.3 × 10− 6和2.4 × 10− 6 mol·m−2·s−1·Pa− 1，H2-N2选择透过率为3.45。中空纤维中更多的指状孔使气体通过支撑体的传输阻力最小化，这是制备的支撑silicalite-1膜具有高渗透性的原因之一。
High quality silicalite-1 membrane was successfully synthesized on the external surface of ceramic hollow fibers by a novel embedded-seeding method. The samples were characterized by XRD, SEM and gas permeation test. It is shown that the obtained silicalite-1 membrane was dense and continuous, with a thickness of about 4–5 μm. Specifically, silicalite-1 membrane exhibited high H2and N2permeances of 8.3 × 10−6and 2.4 × 10−6mol·m−2·s−1·Pa−1with good H2-N2perm-selectivity of 3.45. More finger-like pores in the hollow fibers minimized the gas transport resistance through the support, which is one of the reasons that the prepared supported silicalite-1 membrane is highly permeable.