Title
Molecular shape-selectivity of MFI zeolite nanosheets in n-decane isomerization and hydrocracking Molecular shape-selectivity of MFI zeolite nanosheets in n-decane isomerization and hydrocracking
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
San Diego, Calif. ,
Subject
Physics
Chemistry
Source (journal)
Journal of catalysis. - San Diego, Calif.
Volume/pages
300(2013) , p. 70-80
ISSN
0021-9517
ISI
000317558000009
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
MFI zeolite nanosheets with thickness of 2 and 8 nm were synthesized, transformed into bifunctional catalysts by loading with platinum and tested in n-decane isomerization and hydrocracking. Detailed analysis of skeletal isomers and hydrocracked products revealed that the MFI nanosheets display transition-state shape-selectivity similar to bulk MFI zeolite crystals. The suppressed formation of bulky skeletal isomers and C5 cracking products are observed both in the nanosheets and the bulk crystals grown in three dimensions. This is typical for restricted transition-state shape-selectivity, characteristic for the MFI type pores. It is a first clear example of transition-state shape-selectivity inside a zeolitic nanosheet. Owing to the short diffusion path across the sheets, expression of diffusion-based discrimination of reaction products in the MFI nanosheets was limited. The 2-methylnonane formation among monobranched C10 isomers and 2,7-dimethyloctane among dibranched C10 isomers, which in MFI zeolite are favored by product diffusion, was much less favored on the nanosheets compared to the reference bulk ZSM-5 material.
E-info
https://repository.uantwerpen.be/docman/iruaauth/38bdd2/1ee3ac11296.pdf
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