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ZJUS-B
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology)  2005, Vol. 6 Issue ( 5): 11-    DOI: 10.1631/jzus.2005.B0369
    
Growth mechanism of a preferentially oriented mordenite membrane
LI Gang, LIN Rui-sen, KIKUCHI Eiichi, MATSUKATA Masahiko
Department of Chemistry, Zhejiang University, Hangzhou 310027, China; Department of Applied Chemistry, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
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Abstract  A preferentially oriented mordenite membrane was successfully prepared on a seeded porous a-alumina support. Characterization results of XRD (X-ray diffractometer) and FE-SEM (field emission scanning electron microscope) revealed that evolutionary selection might predominantly contribute to the formation of the sharply oriented mordenite membrane. The necessary conditions under which evolutionary selection occurs are: (a) the number density of nuclei on the support surface should be high enough at the early stage; (b) the crystals should grow fastest along one direction; and (c) the zeolite layer should proceed via the successive growth of the crystals nucleated on the support surface instead of the accumulation of the crystals formed in the bulk solution.

Key words： Chemistry Mordenite      Zeolite membrane      Orientation      Evolutionary selection     
Received: 03 September 2004     
CLC:  O69  
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LI Gang
LIN Rui-sen
KIKUCHI Eiichi
MATSUKATA Masahiko
Cite this article:

LI Gang, LIN Rui-sen, KIKUCHI Eiichi, MATSUKATA Masahiko. Growth mechanism of a preferentially oriented mordenite membrane. Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology), 2005, 6( 5): 11-.

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http://www.zjujournals.com/xueshu/zjus-b/10.1631/jzus.2005.B0369     OR     http://www.zjujournals.com/xueshu/zjus-b/Y2005/V6/I 5/11

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