Stability of bimetallic reforming catalysts

Journal Article · Mon Aug 01 04:00:00 EDT 1988 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(88)90149-2· OSTI ID:6573496

Parera, J M; Beltramini, J N ^[1]

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1. INCAPE, Santa Fe (Argentina)

The catalytic activity, selectivity, and stability of catalysts whose metallic functions were Pt-, Pt-Re-, and Pt-Re-S supported on the same {gamma}-Al{sub 2}O{sub 3} were measured in the reforming of n-hexane and methylcyclopentane. The coke deposition was measured with a microbalance and was studied by TPO, analysis of C and H/C ratio. The introduction of Re and S to Pt increases the selectivity similarly to, but more effectively than, coke formation on Pt during the run. The deactivation during the first hours of the run is due to coke deposition on the metal and at longer times to deposition on the support, which produces very small deactivation. Comparison of the coking of the presulfided bimetallic catalysts with that of the monometallic reveals that the main difference resides in the distribution of the coke. On the presulfided catalyst the fraction of coke on the metallic function is very small because this function was predeactivated for coke formation. The deactivation of the metallic function controls all the catalysts deactivation.

• OSTI ID: 6573496
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 112:2; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BIMETALS
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CATALYTIC REFORMING
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COAL TAR OILS
COKE
CONTROL
CYCLOALKANES
DEACTIVATION
DEPOSITION
DISTILLATES
DISTRIBUTION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HEXANE
HYDROCARBONS
METALS
NAPHTHA
NONMETALS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PLATINUM
PLATINUM METALS
REFORMER PROCESSES
RHENIUM
STABILITY
SULFUR
TEMPERATURE CONTROL
TRANSITION ELEMENTS