Enhancement of catalytic performance in the benzylation of benzene with benzyl alcohol over hierarchical mordenite

[Display omitted] •The hierarchical mordenite obtained by acid–base–acid treatment exhibited remarkably enhanced catalytic performance in the benzylation of benzene with benzyl alcohol.•The obtained hierarchical mordenite could be reused and maintain the initial catalytic activity after reuse. Hiera...

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Bibliographic Details
Published in:Chinese journal of catalysis 2013-10, Vol.306, p.100-108
Main Authors: Leng, Kunyue, Wang, Yi, Hou, Changmin, Lancelot, Christine, Lamonier, Carole, Rives, Alain, Sun, Yinyong
Format: Article
Language:English
Subjects:
acid treatment
Alkylation
aluminum
benzene
benzyl alcohol
Benzylation
Catalysis
Catalysts
catalytic activity
Chemical reactions
Chemical Sciences
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Hierarchical
Hydrocarbons
Ion-exchange
leaching
mass transfer
Mesoporous
Mordenite
Porous materials
silicon
Surface physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Treatment
Zeolites: preparations and properties
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Summary:[Display omitted] •The hierarchical mordenite obtained by acid–base–acid treatment exhibited remarkably enhanced catalytic performance in the benzylation of benzene with benzyl alcohol.•The obtained hierarchical mordenite could be reused and maintain the initial catalytic activity after reuse. Hierarchical mordenites were prepared by a sequential post-treatment method based on a commercial mordenite with a Si/Al molar ratio of 15. The mordenite obtained by acid treatment showed much higher catalytic activity than the parent mordenite in the benzylation of benzene with benzyl alcohol, even a little better than that obtained by acid–base treatment. The apparent reaction rate constant for acid-leached mordenite is six times higher than that for HM. Further, the mordenite with acid–base–acid treatment exhibited the highest catalytic activity among these samples. The apparent reaction rate constant for acid–base–acid-leached mordenite is 15 times that for HM and twice that for acid-leached mordenite and acid–base-leached mordenite. This remarkably enhanced catalytic performance should be attributed to more accessible acid sites and much better mass transfer ability from rich mesoporosity in acid–base–acid-leached mordenite.
ISSN:0021-9517
1872-2067
1090-2694
DOI:10.1016/j.jcat.2013.06.004