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Issue 22, 2018
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An efficient synthesis of NaA zeolite membranes from direct crystallization of gel-dipped macroporous alumina tubes with seeds

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Abstract

Compact NaA zeolite membranes are successfully synthesized by direct crystallization of gel-dipped macroporous Al2O3 tubes. Before gel-dipping, NaA seeds are pasted on Al2O3 tubes, followed by macropore-plugging with liquid. After the gel-dipping, a thin gel-layer formed on the Al2O3 tube is directly crystallized into NaA zeolite membranes at 100 °C for 4 h in the absence of any excess liquid. The as-synthesized NaA membranes exhibit high pervaporation performance with a remarkable separation factor larger than 10 000 and high flux of 2.73 kg m−2 h−1 for dehydration of 90 wt% ethanol at 75 °C. This new efficient synthesis is potentially significant for preparation of high-performance, low-cost, and reproducible zeolite membranes.

Graphical abstract: An efficient synthesis of NaA zeolite membranes from direct crystallization of gel-dipped macroporous alumina tubes with seeds

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Publication details

The article was received on 12 Jan 2018, accepted on 30 Apr 2018 and first published on 02 May 2018


Article type: Paper
DOI: 10.1039/C8TA00380G
Citation: J. Mater. Chem. A, 2018,6, 10484-10489
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    An efficient synthesis of NaA zeolite membranes from direct crystallization of gel-dipped macroporous alumina tubes with seeds

    S. Pan, X. Meng, Z. Wang, Y. Yan and F. Xiao, J. Mater. Chem. A, 2018, 6, 10484
    DOI: 10.1039/C8TA00380G

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