Synthesis and characterization of (h0l) oriented high-silica zeolite beta membrane

Chen, Y., Zhu, G., Peng, Y., Yao, X. and Qiu, S. (2009) Synthesis and characterization of (h0l) oriented high-silica zeolite beta membrane. MICROPOROUS AND MESOPOROUS MATERIALS, 124 1-3: 8-14. doi:10.1016/j.micromeso.2009.04.012


Author Chen, Y.
Zhu, G.
Peng, Y.
Yao, X.
Qiu, S.
Title Synthesis and characterization of (h0l) oriented high-silica zeolite beta membrane
Journal name MICROPOROUS AND MESOPOROUS MATERIALS   Check publisher's open access policy
ISSN 1387-1811
Publication date 2009-08-01
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.micromeso.2009.04.012
Volume 124
Issue 1-3
Start page 8
End page 14
Total pages 7
Editor Stoecker, M.
Place of publication Netherlands
Publisher Elsevier BV
Collection year 2010
Language eng
Subject C1
100708 Nanomaterials
970109 Expanding Knowledge in Engineering
Abstract The (h0l) oriented high-silica zeolite beta membrane was prepared with improved method in fluoride media. Dealuminated zeolite beta nanocrystals used as seeds were preliminary deposited on support, and then the seeded supports were vertically placed in autoclaves for hydrothermal synthesis. After the secondary growth of seeded supports at 413 K for 2 days, zeolite membranes were characterized by X-ray diffraction and scanning electron microscopy to determine their morphology and preferred orientation. Zeolite beta membranes with a thickness of intergrown crystal layer around 2 mu m were prepared and the crystals with typical truncated square bipyramidal morphology were packed tightly with their pyramidal (h0l) face perpendicular to the plane of membrane. in addition, ICP-AES chemical analysis was utilized to confirm the composition of seeds and membrane, and the Si/Al molar ratio of zeolite beta membrane was around 5000. The (001) and randomly orientated zeolite beta membranes were also prepared by changing the composition of starting synthesis gel and pH value. A competitive growth model was proposed to explain the formation of oriented membranes. The (h0l) oriented high-silica zeolite beta membrane with few cracks exhibited higher pervaporation flux.
Keyword Beta
IN-SITU CRYSTALLIZATION
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Chemical Engineering Publications
 
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Created: Thu, 03 Sep 2009, 07:45:16 EST by Mr Andrew Martlew on behalf of School of Chemical Engineering