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Synthesis and Characterization of Large NaX Zeolite Crystals by Continuous Crystallization

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Abstract:

NaX zeolite crystals of 50 µm were grown by a continuous crystallization with seed crystal (10 ㎛) in a mother solution having a 3.5Na2O : Al2O3 : 2.1SiO2 : 1000H2O composition. The seed crystal morphology of NaX zeolite shows that an octahedron is formed composed of 8 equilateral triangles which have an average lattice constant of a = 24.9911 Å with a SiO2/Al2O3 molar ratio of 2.1~2.4. In order to grow crystals of zeolite X to an appropriate size by the continuous method, the mother solution was supplied with various seed contents (3~20 wt%) in an autoclave at 90°C after 7, 12, 16, 19 and 24 days.

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Periodical:

Materials Science Forum (Volumes 492-493)

Pages:

731-736

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.492-493.731

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Online since:

August 2005

Authors:

Hae Jin Lee, Hyung Mi Lim, Ik Jin Kim

Keywords:

Crystallization, Large Crystal, NaX Zeolite, Nucleation, Seed

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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