Hydrogenolysis and isomerization of n-butane on low-index Pt single crystals and polycrystalline Pt foil

Journal Article · Fri Mar 01 04:00:00 EST 1996 · Journal of Catalysis

DOI:https://doi.org/10.1006/jcat.1996.0060· OSTI ID:263768

Anderson, S L; Datye, A K ^[1]

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1. Univ. of New Mexico, Albuquerque, NM (United States); and others

The hydrogenolysis and isomerization of n-butane over Pt(100) and Pt(111) single crystals and a polycrystalline Pt foil have been studied over a wide range of reaction temperatures (510-610 K) and hydrogen partial pressures (7.5-250 Torr). The activity and selectivity have both been determined as a function of temperature and hydrogen partial pressure. The more open Pt(100) surface was an order of magnitude more active than the close-packed Pt(111) surface. Hydrogenolysis selectivities were invariant with reaction temperature over the range studied. Hydrogen partial pressure affected both the activity and product distribution. Both single-crystal surfaces exhibit a decrease in the activity as the H{sub 2} pressure is decreased below a critical amount and this decrease is directly attributable to the formation of a carbonaceous surface residue. The amount of isomerization was always less than the amount of hydrogenolysis regardless of the n-butane to hydrogen ratio or the reaction temperature. 30 refs., 8 figs.

• OSTI ID: 263768
• Journal Information: Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 1 Vol. 159; ISSN 0021-9517; ISSN JCTLA5
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
40 CHEMISTRY
BUTANE
CATALYTIC EFFECTS
HETEROGENEOUS CATALYSIS
HYDROGENATION
ISOMERIZATION
PARTIAL PRESSURE
PLATINUM
PRESSURE DEPENDENCE
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0400-1000 K