Pentane transformation on HZSM-5
- Univ. of Wisconsin, Milwaukee, WI (United States)
The dealuminated HZSM-5 studied in this work have relatively low contents in nonframework aluminum (NFAl) and the number of Lewis acid sites is not measurable by CO low temperature desorption FTIR studies. Therefore the activity in pentane, or isopentane transformation is mainly due to the Bronsted acidity. A good correlation is found between the activity and the number of aluminum in the {sup 4}Q(Si-1-Al) linkage, suggesting that the Bronsted sites due to Al in the {sup 4}Q(Si-n-Al) with n>1 are less acidic. The activation energy for cracking is systematically higher than that for isomerization but cracking is the dominant reaction. The activity ratio C5/i-C5 could be used as a constraint index.
- OSTI ID:
- 215005
- Report Number(s):
- CONF-950801--
- Country of Publication:
- United States
- Language:
- English
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