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CRYSTALLIZATION KINETICS OF SILICALITE .1. USE OF TETRAPROPYLAMMONIUM BROMIDE AND CHLORIDE AS TEMPLATES
Date
1993-01-01
Author
CULFAZ, A
Gündüz, Ufuk
ORBEY, H
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Silicalite-1, the aluminum-free end number of the ZSM-5 zeolites, was synthesized from a batch composition of 3.25 Na2O . 40.0 SiO2 . 552 H2O . 2.00 TPA by using tetrapropylammonium bromide (TPA-Br) or chloride (TPA-Cl) as templates in the temperature range of 100 to 175-degrees-C in a batch system. Conversion of silica in the starting batch composition into silicalite-1 in the product was followed quantitatively. The activation energies of nucleation and crystallization were determined as 37.2 and 66.5 kJ/mol, respectively. The use of TPA-Cl as the template instead of TPA-Br results in longer induction period for crystallization to start and a larger crystal size in product.
Subject Keywords
Zeolite ZSM-5
,
Nucleation
URI
https://hdl.handle.net/11511/32270
Journal
CRYSTAL RESEARCH AND TECHNOLOGY
DOI
https://doi.org/10.1002/crat.2170280107
Collections
Graduate School of Natural and Applied Sciences, Article
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BibTeX
A. CULFAZ, U. Gündüz, and H. ORBEY, “CRYSTALLIZATION KINETICS OF SILICALITE .1. USE OF TETRAPROPYLAMMONIUM BROMIDE AND CHLORIDE AS TEMPLATES,”
CRYSTAL RESEARCH AND TECHNOLOGY
, vol. 28, no. 1, pp. 29–38, 1993, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32270.