An efficient synthesis of NaA zeolite membranes from direct crystallization of gel-dipped macroporous alumina tubes with seeds†,Journal of Materials Chemistry A

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An efficient synthesis of NaA zeolite membranes from direct crystallization of gel-dipped macroporous alumina tubes with seeds†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2018-05-02 00:00:00 , DOI: 10.1039/c8ta00380g
Shuxiang Pan _{1,

2,

3,

4,

5} , Xiangju Meng _{1,

2,

3,

4,

5} , Zhengbao Wang _{3,

5,

6,

7,

8} , Yushan Yan _{3,

5,

6,

7,

8} , Feng-Shou Xiao _{1,

2,

3,

4,

5}

Affiliation

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.

中文翻译：

从带有种子的胶浸大孔氧化铝管直接结晶中有效合成NaA沸石膜†

通过直接浸胶的大孔Al ₂ O ₃管的直接结晶，成功合成了紧凑的NaA沸石膜。浸胶之前，将NaA种子粘贴在Al ₂ O ₃管上，然后用液体进行大孔堵塞。凝胶浸渍后，在没有任何过量液体的情况下，在100°C下将在Al ₂ O ₃管上形成的薄凝胶层直接结晶成NaA沸石膜4小时。合成后的NaA膜表现出高全蒸发性能，分离系数大于10000，通量高达2.73 kg m ^-2 h ^-1用于在90°C下脱水90 wt％的乙醇。这种新的有效合成方法对于制备高性能，低成本和可重现的沸石膜具有潜在的重要意义。

更新日期：2018-05-02

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