The tunneling action of Group VIII metal particles in catalyzed graphite hydrogenation

Journal Article · Tue Nov 01 04:00:00 EST 1988 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(88)90007-3· OSTI ID:6912951

Goethel, P J; Yang, R T ^[1]

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1. State Univ. of New York, Buffalo (USA)

A new catalyst action in catalyzed graphite hydrogenation, termed tunneling, is observed and studied for Pt, Ni, and Ru. The metal particles undergo tunneling in the a direction of graphite (parallel to the basal plane), gasifying carbon. The linear speed of tunneling is independent of particle size. The sequential steps in the reaction are C-C bond breakage and dissolution of carbon into the metal at the leading-edge carbon-metal interface, diffusion of carbon in metal, and reaction between C and H on metal surface. The last step is rate limiting, and is a common step for deep-layer channeling, monolayer channeling, as well as the methanation reaction. Both tunneling and monolayer channeling actions are at least as important as deep-layer channeling in the overall rate for graphite hydrogenation.

• OSTI ID: 6912951
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 114:1; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
CARBON
CATALYSIS
CATALYTIC EFFECTS
CHEMICAL BONDS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CLEAVAGE
COAL LIQUEFACTION
CRYSTAL STRUCTURE
DIFFUSION
DISSOLUTION
ELEMENTAL MINERALS
ELEMENTS
GRAPHITE
HYDROGENATION
KINETICS
LIQUEFACTION
METALS
METHANATION
MICROSTRUCTURE
MINERALS
NICKEL
NONMETALS
PARTICLE SIZE
PLATINUM
PLATINUM METALS
REACTION KINETICS
RUTHENIUM
SIZE
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS