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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Citation Formats

A. CULFAZ, U. Gündüz, and H. ORBEY, “CRYSTALLIZATION KINETICS OF SILICALITE .1. USE OF TETRAPROPYLAMMONIUM BROMIDE AND CHLORIDE AS TEMPLATES,” CRYSTAL RESEARCH AND TECHNOLOGY, pp. 29–38, 1993, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32270.