Mechanistic Investigations of Ethylbenzene Disproportionation over Medium-Pore Zeolites with Different Framework Topologies
SCIE
SCOPUS
- Title
- Mechanistic Investigations of Ethylbenzene Disproportionation over Medium-Pore Zeolites with Different Framework Topologies
- Authors
- Min, HK; Hong, SB
- Date Issued
- 2011-08-18
- Publisher
- AMER CHEMICAL SOC
- Abstract
- Ethylbenzene disproportionation has long been recognized as a useful test reaction for distinguishing between medium- and large-pore zeolites because medium-pore materials show neither an induction period nor a diethylbenzene deficit, unlike large-pore ones. Hence, the mechanism of this reaction over all medium-pore zeolites has been regarded as simply monomolecular to date. Here, we demonstrate that the pore architecture of medium-pore zeolites strongly influences the type of main reaction intermediates of ethylbenzene disproportionation and, thus, that of the prevailing reaction mechanism: dual-cycle diphenylethane-mediated, bimolecular diphenylethane-mediated, or monomolecular ethyl-transfer reaction pathway. To our knowledge, our study provides more manifest experimental evidence for the transition state shape selectivity in zeolite catalysis than has ever been reported.
- Keywords
- STATE SHAPE SELECTIVITY; HIGH-SILICA ZEOLITE; CATALYTIC-PROPERTIES; CONSTRAINT INDEX; MOLECULAR-SIEVES; TRANSITION-STATE; ALKYLBENZENES; ISOMERIZATION; CONVERSION; KINETICS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/16786
- DOI
- 10.1021/JP204945C
- ISSN
- 1932-7447
- Article Type
- Article
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY C, vol. 115, no. 32, page. 16124 - 16133, 2011-08-18
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