Mechanism of graphite hydrogenation catalyzed by ruthenium particles

Journal Article · Sun May 01 04:00:00 EDT 1988 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(88)90079-6· OSTI ID:6963512

Goethel, P J; Yang, R T

Monolayer channeling on the basal plane of graphite is studied for the Ru-catalyzed C-H/sub 2/ reaction (producing CH/sub 4/). Etch decoration transmission electron microscopy is the principal technique employed in the study. The monolayer channeling action commences at approximately 850/sup 0/C and involves the following sequential steps: breakage of two carbon-carbon bonds and dissolution of C in Ru at the /101l/ edge/Ru interface, bulk/surface diffusion of C in Ru, and reaction of C with chemisorbed H on the Ru surface. The surface reaction is the rate-limiting step. Using a lower-bound diffusivity from filament growth data and their experimental value of solubility, the bulk diffusion flux of C in Ru is an order of magnitude higher than the overall rate. Furthermore, it is shown that the contribution of monolayer channeling to the overall carbon gasification rate is at least as important as that by deep-layer channeling.

• Research Organization: State Univ. of New York, Buffalo (USA)
• OSTI ID: 6963512
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 111:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
ALKANES
CARBON
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL GASIFICATION
ELECTRON MICROSCOPY
ELEMENTAL MINERALS
ELEMENTS
GASIFICATION
GRAPHITE
HYDROCARBONS
HYDROGENATION
KINETICS
METALS
METHANE
MICROSCOPY
MINERALS
NONMETALS
ORGANIC COMPOUNDS
PLATINUM METALS
REACTION KINETICS
RUTHENIUM
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
TRANSMISSION ELECTRON MICROSCOPY