CHARACTERIZATION OF HIGH-SILICA MORDENITE OBTAINED BY DIRECT SYNTHESIS
Three high-silica mordenite zeolites differing in SiO440, ratio were prepared by direct synthesis without using any template. The products Si02/A120, ratio is influenced by the starting gel composition. This ratio is increased upon ion-exchange with NH,Cl and subsequent calcination to prepare proton...
Saved in:
| Format: | Article |
|---|---|
| Language: | English |
| Published: |
University of Tehran
1998-06-01
|
| Series: | Journal of Sciences, Islamic Republic of Iran |
| Online Access: | https://jsciences.ut.ac.ir/article_31468_b52852e42743d9b7f886653d167fdaeb.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Three high-silica mordenite zeolites differing in SiO440, ratio were prepared by
direct synthesis without using any template. The products Si02/A120, ratio is
influenced by the starting gel composition. This ratio is increased upon ion-exchange
with NH,Cl and subsequent calcination to prepare protonic mordenite. The protonic
mordenites with Si02/A1203ra tios of 14.6,29.2 and 34.6 were characterized by X-ray
diffraction, energy dispersive X-ray microprobe analysis, scanning electron microscopy
and thermogravimetric analysis. Catalytic cracking of n-hexane was studied as a
measure of catalytic activity of protonic mordenites. Catalytic activities are expressed
as conversion percent of n-hexane. Catalysts with higher Si02/A1,03 were found to
be more active |
|---|---|
| ISSN: | 1016-1104 2345-6914 |