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Surface silanol sites in mesoporous MFI zeolites for catalytic Beckmann rearrangement

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Title
Surface silanol sites in mesoporous MFI zeolites for catalytic Beckmann rearrangement
Author(s)
Hanyoung Park; Jisuk Bang; Hongjun Park; Jaeheon Kim; Jeong-Chul Kim; Jeong Young Park; Ryoo, Ryong
Publication Date
2023-06
Journal
CATALYSIS SCIENCE & TECHNOLOGY, v.2023, no.11, pp.3436 - 3444
Publisher
ROYAL SOC CHEMISTRY
Abstract
Silanol groups were generated in siliceous MFI zeolite nanosheets, via alkali-free synthesis routes, for catalytic application for gas-phase Beckmann rearrangement. The catalytic conversion by the zeolite nanosheets was investigated at 310 or 350 degrees C with cyclohexanone oxime, 4-phenylcyclohexanone oxime and cyclododecanone oxime. Here, cyclohexanone oxime was chosen as a small reactant that should be able to diffuse into the zeolite micropores, while the others were too bulky to diffuse. The catalytic conversion was analyzed in reference to a previous method used to generate hydrogen-bonded silanol nests in bulk-crystalline MFI zeolites using NH3/NH4+. The result of the analysis indicated that the silanol nest was necessary for the catalytic conversion of cyclohexanone oxime and 4-phenylcyclohexanone oxime, but isolated silanols on the external surface were sufficient for the reaction of cyclododecanone oxime.
URI
https://pr.ibs.re.kr/handle/8788114/13436
DOI
10.1039/d3cy00543g
ISSN
2044-4753
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > 1. Journal Papers (저널논문)
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