Accessibility and Interaction of Surface OH Groups in Microporous and Mesoporous Catalysts Applied for Vapor-Phase Beckmann Rearrangement of Oximes

Autor: V. R. Reddy Marthala, Jörg Frey, Michael Hunger
Rok vydání: 2010
Předmět:
Zdroj: Catalysis Letters. 135:91-97
ISSN: 1572-879X
1011-372X
DOI: 10.1007/s10562-010-0274-7
Popis: 1H and 2H MAS NMR spectroscopy were utilized for investigating the interaction of surface complexes upon adsorption of cyclohexanone and cyclododecanone oxime on MFI-type zeolites and [Al]SBA-15. Signals of hydrogen-bonded and protonated complexes were identified and evidenced the diffusion of cyclohexanone oxime into the micropores of silicalite-1 and ZSM-5 and limited accessibility of acid sites in [Al]SBA-15 for cyclododecanone oxime. 1H and 2H MAS NMR spectroscopy were utilized for investigating the accessibility and interaction of surface OH groups on microporous MFI-type zeolites and mesoporous [Al]SBA-15 material with oximes of different molecular sizes.
Databáze: OpenAIRE