The influence of sulfur and carbonaceous deposits on the selectivity and activity of Pt/Co catalysts in hydrocarbon reactions

Journal Article · Sun Oct 01 04:00:00 EDT 1989 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(89)90168-1· OSTI ID:7086446

Dees, M J; Ponec, V ^[1]

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1. Leiden Univ. (Netherlands)

The selectivity patterns in n-hexane/hydrogen reactions have been studied with silica and {gamma}-alumina-supported Pt/Co monometallic and bimetallic catalysts. X-ray diffraction data of the silica-supported systems indicate that although alloys are formed, a part of Co stays out of the alloy particles observed by XRD. Changing the Co content in the bulk of the catalyst results in a dramatic shift in selectivity, due to the hydrogenolytic activity of Co. Also the activity and deactivation strongly depend upon the Co content. Presulfurization or coking of the bimetallic Pt/Co catalysts leads to a strong increase in the selectivity to isomerization when acidic sites are present. Experiments with pyridine confirm the acidic character of isomerization by {gamma}-alumina.

• OSTI ID: 7086446
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 119:2; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AZINES
BIMETALS
CARBON
CARBONIZATION
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL TAR OILS
COBALT
COHERENT SCATTERING
COKING
DEACTIVATION
DECOMPOSITION
DEHYDROGENATION
DIFFRACTION
DISTILLATES
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
HEXANE
HYDROCARBONS
HYDROGENATION
ISOMERIZATION
METALS
MINERALS
NAPHTHA
NONMETALS
OILS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PLATINUM
PLATINUM METALS
PROCESSING
PYRIDINE
PYRIDINES
REFINING
SCATTERING
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SPECIFICITY
SULFIDATION
SULFUR
TRANSITION ELEMENTS
X-RAY DIFFRACTION