ISSN:
1572-9028
Keywords:
1‐butene
;
silicoaluminophosphates
;
molecular sieves
;
skeletal isomerization
;
Brønsted acidity
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The skeletal isomerization of 1‐butene was performed over a series of silicoaluminophosphate molecular sieves with AEL structure (SAPO‐11). The results were compared with those obtained over an aluminophosphate molecular sieve (AlPO4‐11). The three SAPO‐11 samples, with different acidic properties, were synthesized by either varying the chemical composition of the synthesis gel or by varying the preparation time of the aforementioned gel. The catalytic results indicate that irrespective of how the acidity of the SAPO‐11 samples is changed (viz., independently of the method elected to modify the acidic properties of the samples), a close parallelism between the selectivity towards the skeletal isomerization and the number of (moderate + strong) Brønsted acid sites (sites retaining pyridine above 623 K) was observed for the SAPO‐11 solids. These results, definitively, indicate the participation of these acid sites in the skeletal isomerization process.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1019107916156
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