Coking of Pt-Ir/Al sub 2 O sub 3 and Pt-Re/Al sub 2 O sub 3 catalysts in different pressures of cyclopentane

Journal Article · Thu Nov 01 04:00:00 EST 1990 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(90)90061-N· OSTI ID:5538031

Barbier, J; Churin, E; Marecot, P ^[1]

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1. Laboratoire de Catalyse Organique (France)

The coking reaction with cyclopentane was investigated at various pressures on bimetallic Pt-Re/Al{sub 2}O{sub 3} and Pt-Ir/Al{sub 2}O{sub 3} catalysts. At atmospheric pressure addition of iridium or rhenium to platinum acts in the same way on the amount of deposited coke as an increasing working pressure on pure Pt/Al{sub 2}O{sub 3} catalysts. Such modification induces a lowering of coke content and yields more dehydrogenated carbonaceous deposits. Nevertheless, the toxicity of coke defined by its fouling effect on the pure metallic reaction of benzene hydrogenation depends on the nature of the metallic phase and the overall pressure. These toxicities are linked to the presence of light polyaromatic compounds which are precursors of graphitic coke.

• OSTI ID: 5538031
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 126:1; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATICS
BENZENE
BIMETALS
CARBONIZATION
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CATALYTIC REFORMING
CHALCOGENIDES
CHEMICAL REACTIONS
COKE
COKING
CYCLOALKANES
DEACTIVATION
DECOMPOSITION
DEPOSITION
ELEMENTS
HYDROCARBONS
HYDROGENATION
IRIDIUM
METALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PENTANE
PLATINUM
PLATINUM METALS
PRESSURE DEPENDENCE
REFORMER PROCESSES
RHENIUM
TRANSITION ELEMENTS