Influence of metal-support interactions on the reaction of n-hexane over supported Pt catalysts

Journal Article · Thu Oct 01 00:00:00 EDT 1987 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(87)90302-2· OSTI ID:5204484

Anderson, J B.F.; Burch, R; Cairns, J A

The hydrogenolysis and skeletal rearrangement reactions of n-hexane have been investigated on Pt catalysts supported on silica and titania. The results show that the product distribution is dependent on the choice of support but that Pt/titania catalysts in the normal state are similar to Pt/titania catalysts in the strong metal-support interaction (SMSI) state. It is observed that in the SMSI state, when more than 99% of the Pt is inaccessible to hydrogen, the activity is only slightly reduced. Surprisingly, the selectivity for hydrogenolysis versus skeletal isomerization is almost the same in normal and in SMSI catalysts. The results provide evidence that the same active center is involved in both the hydrogenolysis and the skeletal rearrangement reactions, and do not support the contention that hydrogenolysis requires a larger ensemble of Pt atoms than skeletal rearrangement. The results are interpreted in terms of an active center consisting of a single Pt atom located in the planes of the small Pt crystallites. The precise selectivity observed may depend on the local environment of the Pt atom during the sojourn of the n-hexane molecule on the active center.

• Research Organization: Univ. of Reading (England)
• OSTI ID: 5204484
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 107:2; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKANES
CATALYSIS
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
ELEMENTS
HEXANE
HYDROCARBONS
HYDROGENATION
ISOMERIZATION
METALS
MINERALS
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS