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 00:00:00 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), Vol. 126:1; ISSN 0021-9517
• Country of Publication: United States
• Language: English

Related Subjects

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