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首页> 外文期刊>Journal of porous materials >Gas permeation properties of NaA zeolite membranes: effect of silica source on hydrogel synthesis and layer thickness
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Gas permeation properties of NaA zeolite membranes: effect of silica source on hydrogel synthesis and layer thickness

机译：NaA分子筛膜的气体渗透特性：二氧化硅源对水凝胶合成和层厚度的影响

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摘要

NaA zeolite membranes were prepared on the inner surfaces of ceramic alpha-alumina tubes based on an aqueous phase synthesis in order to investigate the influence of different silica sources on NaA zeolite membrane synthesis and zeolite layer thickness with reference to the gas separation properties. SEM and XRD results indicated that zeolite prepared with sodium metasilicate as the silica source can be synthesized for a NaA zeolite membrane, leading to uniform zeolite layers and good thermal stability. The H-2 permeance at 25 degrees C was 4.99x10(-7)molm(-2)s(-1)Pa(-1), and the H-2/Ar and H-2/He permselectivities were 3.78 and 1.36, respectively. The morphologies and single gas permeation properties of the NaA zeolite membranes prepared through repeated aqueous phase synthesis treatments were also studied. When the zeolite layer thickness increased from 2.9 to 53 mu m, the H-2 permeance gradually decreased, while the permselectivities increased from 3.78 to 5.17. The gas permeance was mainly controlled by the Knudsen diffusion in our NaA zeolite membrane.
机译：基于水相合成，在陶瓷α-氧化铝管的内表面上制备NaA沸石膜，以参考气体分离特性，研究不同二氧化硅源对NaA沸石膜合成和沸石层厚度的影响。 SEM和XRD结果表明，以偏硅酸钠为二氧化硅源制备的沸石可以合成NaA分子筛膜，得到均匀的沸石层和良好的热稳定性。 25°C下的H-2磁导率为4.99x10（-7）molm（-2）s（-1）Pa（-1），H-2 / Ar和H-2 / He的磁导率分别为3.78和1.36 ， 分别。还研究了通过反复水相合成处理制备的NaA沸石膜的形貌和单气体渗透性能。当沸石层厚度从2.9增加到53μm时，H-2渗透率逐渐降低，而渗透率从3.78增加到5.17。气体渗透率主要是由我们的NaA沸石膜中的Knudsen扩散控制的。

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  • 来源
    《Journal of porous materials》 |2019年第4期|1121-1129|共9页
  • 作者

    Lee Sang Moon; Lee Ye Hwan; Grace John R.; Li Anwu; Lim C. Jim; Fotovat Farzam; Schaadt Achim; White Robin J.; Kim Sung Su;

  • 作者单位

    Kyonggi Univ, Dept Environm Energy Engn, 94-6 San, Suwon 442760, Gyeonggi Do, South Korea;

    Kyonggi Univ, Dept Environm Energy Engn, 94-6 San, Suwon 442760, Gyeonggi Do, South Korea;

    Univ British Columbia, Dept Chem & Biol Engn, 2360 East Mall, Vancouver, BC V6T 1Z3, Canada;

    Univ British Columbia, Dept Chem & Biol Engn, 2360 East Mall, Vancouver, BC V6T 1Z3, Canada|NORAM Engn & Constructors Ltd, Suite 1800-200,Granville St, Granville, BC V6C 1S4, Canada;

    Univ British Columbia, Dept Chem & Biol Engn, 2360 East Mall, Vancouver, BC V6T 1Z3, Canada;

    Univ British Columbia, Dept Chem & Biol Engn, 2360 East Mall, Vancouver, BC V6T 1Z3, Canada;

    Fraunhofer Inst Solar Energy Syst ISE, Heidenhofstr 2, D-79110 Freiburg, Germany;

    Fraunhofer Inst Solar Energy Syst ISE, Heidenhofstr 2, D-79110 Freiburg, Germany;

    Kyonggi Univ, Dept Environm Energy Engn, 94-6 San, Suwon 442760, Gyeonggi Do, South Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    NaA zeolite membrane; Permeance; Permselectivity; Knudsen diffusion; Molecular sieving;

    机译：Naa沸石膜;渗透;渗透率;knudsen扩散;分子筛分;

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