Ester hydrogenation over Pd-Zn/SiO[sub 2]
- Eastman Chemical Co., Kingsport, TN (United States)
The activity of bimetallic Pd-Zn/SiO[sub 2] catalysts have been measured for a series of samples prepared by either impregnation or ion-exchange techniques. Catalysts prepared by ion-exchange of Pd(NH[sub 3])[sub 4][sup +] onto SiO[sub 2] followed by reduction and subsequent impregnation of Zn exhibited the highest activity for methyl acetate hydrogenation. Both catalyst activity and selectivity to ethanol were dependent on the Pd:Zn ratio. The presence of PdZn bimetallics was confirmed using controlled atmosphere XRD, XPS, and STEM/EDS analysis. Oxidation at ambient temperatures did not disrupt the bulk Pd-Zn interaction, but did result in changes in the reversible oxidation of the surface. 12 refs., 2 figs., 9 tabs.
- OSTI ID:
- 6201741
- Journal Information:
- Journal of Catalysis; (United States), Journal Name: Journal of Catalysis; (United States) Vol. 140:2; ISSN 0021-9517; ISSN JCTLA5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ACETIC ACID ESTERS
ALCOHOLS
CARBOXYLIC ACID ESTERS
CATALYSIS
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COHERENT SCATTERING
CONCENTRATION RATIO
DIFFRACTION
ELECTRON DIFFRACTION
ELECTRON MICROSCOPY
ELECTRON SPECTROSCOPY
ESTERS
ETHANOL
HETEROGENEOUS CATALYSIS
HYDROGENATION
HYDROXY COMPOUNDS
IMPREGNATION
ION EXCHANGE
METHYL ACETATE
MICROSCOPY
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PALLADIUM COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
REDUCTION
SCANNING ELECTRON MICROSCOPY
SCATTERING
SILICON COMPOUNDS
SILICON OXIDES
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY
ZINC COMPOUNDS