Surfactant-directed mesoporous zeolites with enhanced catalytic activity in tetrahydropyranylation of alcohols: Effect of framework type and morphology

Nanosponge zeolite beta was hydrothermally synthesized using multi-quarternary ammonium surfactant as a mesa-micro hierarchical structure directing agent. The nanosponge morphology of the beta zeolite consisted of randomly interconnected nanocrystals with thickness of 10-20 nm. The beta nanosponges with highly mesoporous structure exhibited enhanced catalytic activity in tetrahydropyranylation of alcohols (methanol, 1-octanol, cyclohexanol and 2-adamantanol) when compared with the conventional beta zeolites and nanosponge zeolites of MTW and MFT framework types. The enhanced catalytic performance (similar to 60% conversion with 90-100% selectivity towards tetrahydropyranyl ether and over two times higher initial rate compared to other zeolites) of hierarchical beta nanosponges can be attributed to the high accessibility of acid sites and facile diffusion of reactants and products through the mesopores. (C) 2017 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2017-05
Language
English
Keywords

SOLVENT-FREE TETRAHYDROPYRANYLATION; MFI ZEOLITE; 2-DIMENSIONAL ZEOLITES; ACIDIC PROPERTIES; ORGANIC-SYNTHESIS; GROUP PROTECTION; PHENOLS; BETA; DEACTIVATION; PERFORMANCE

Citation

APPLIED CATALYSIS A-GENERAL, v.537, pp.24 - 32

ISSN
0926-860X
DOI
10.1016/j.apcata.2017.02.019
URI
http://hdl.handle.net/10203/223906
Appears in Collection
CH-Journal Papers(저널논문)
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