Characterization by [.sup.27.Al] NMR, X-ray absorption spectroscopy, and density functional theory techniques of the species responsible for benzene hydrogenation in Y zeolite-supported carburized molybdenum catalysts
Article Abstract:
The effects of molybdenum loading and the method of molybdenum incorporation, adsorption of molybdenum hexacarbonyl or impregnation with ammonium heptamolybdate (AHM) solution, on benzene hydrogenation activity and stability are investigated for catalysts supported on a dealuminated Y zeolite. In the catalyst prepared by impregnation with AHM solution followed by carburization, the molybdenum has interacted with extraframework alumina to produce highly disordered mixed molybdenum-aluminum oxycarbides.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
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Interplay of bonding and geometry of the adsorption complexes of light alkanes within cationic faujasites. Combined spectroscopic and computational study
Article Abstract:
Adsorption of light alkanes to magnesium and calcium exchanged Y zeolite is investigated using FT-IR spectroscopy, quantum-chemical methods, and topological analysis of the electron density distribution functions. Results reveal that, due to the much smaller ionic radius of the [Mg.sup.2} ion as compared to that of [Ca.sup.2}, the former ions are significantly shielded with the surrounding oxygens of the zeolitic cation site.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
User Contributions:
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