Effect of pore diffusion in enantioselective hydrogenation with supported nickel catalysts
Journal Article
·
· J. Catal.; (United States)
Nickel dispersed on wide-pore silica has been used as catalyst in a study of the reaction kinetics of the hydrogenation of methyl-acetoacetate (MAA). The hydrogenation in the gas phase with a H/sub 2//MAA ratio of approx. 10/sup 3/ is found to be limited by the catalytic reaction proper if the rate is kept low, but tends to become limited by pore diffusion of MAA when higher temperatures, higher Ni surface areas, or lower space velocities are used. In the liquid (MAA + methanol) phase the rate is limited by pore diffusion of dissolved hydrogen. Consequently the rate depends on the catalyst pellet size, as does also the enantioselectivity for samples modified with aqueous R,R-tartaric acid.
- Research Organization:
- Rijksuniversiteit Leiden, Netherland
- OSTI ID:
- 6384337
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 76:2; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ACETOACETIC ACID ESTERS
ALCOHOLS
CARBOXYLIC ACID ESTERS
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
DATA
DIFFUSION
ELEMENTS
ENANTIOMORPHS
ESTERS
EXPERIMENTAL DATA
FLUIDS
GASES
HYDROGEN
HYDROGENATION
HYDROXY COMPOUNDS
INFORMATION
KINETICS
METALS
METHANOL
MICROSTRUCTURE
MINERALS
NICKEL
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
POROSITY
REACTION KINETICS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
TRANSITION ELEMENTS
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ACETOACETIC ACID ESTERS
ALCOHOLS
CARBOXYLIC ACID ESTERS
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
DATA
DIFFUSION
ELEMENTS
ENANTIOMORPHS
ESTERS
EXPERIMENTAL DATA
FLUIDS
GASES
HYDROGEN
HYDROGENATION
HYDROXY COMPOUNDS
INFORMATION
KINETICS
METALS
METHANOL
MICROSTRUCTURE
MINERALS
NICKEL
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
POROSITY
REACTION KINETICS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
TRANSITION ELEMENTS