The CO/H sub 2 reaction on Rh/Al sub 2 O sub 3. I. Steady-state and transient kinetics

Journal Article · Wed Nov 01 04:00:00 EST 1989 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(89)90255-8· OSTI ID:6781429

Efstathiou, A M; Bennett, C O ^[1]

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1. Univ. of Connecticut, Storrs (USA)

Various hydrogen titrations yield the surface composition of Rh/Al{sub 2}O{sub 3} during the CO/H{sub 2} reaction at temperatures in the range 180-260 C. There is a very small amount of active carbon C{sub {alpha}}, 0.02-0.06 monolayer, and 0.70-0.98 monolayer of CO on the metal surface. The coverage of H is low. Also present are inactive carbon C{sub {beta}} on the metal and formate species on the support. The surface coverages are consistent with the observed steady-state kinetics, which result in methane as the predominant product. Although the rate-limiting step may be the dissociation of surface CO, it is found that the reaction sequence passes through a small coverage of highly active surface carbon C{sub {alpha}}.

• OSTI ID: 6781429
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 120:1; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010408* -- Coal
Lignite
& Peat-- C1 Processes-- (1987-)
ACTIVATED CARBON
ADSORBENTS
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DEPOSITION
DISSOCIATION
ELEMENTS
HYDROCARBONS
HYDROGENATION
KINETICS
METALS
METHANATION
METHANE
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
REACTION KINETICS
RHODIUM
STEADY-STATE CONDITIONS
SURFACE PROPERTIES
SYNTHESIS
TEMPERATURE DEPENDENCE
TRANSIENTS
TRANSITION ELEMENTS