Multiple isotope tracing of methanation over nickel catalyst

Journal Article · Mon Sep 01 04:00:00 EDT 1980 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(80)90278-X· OSTI ID:6872317

Happel, J ^[1]; Suzuki, I; Kokayeff, P; Fthenakis, V

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1. Columbia Univ., New York, NY

The methanation of mixtures of carbon monoxide and hydrogen over a supported nickel catalyst was studied by transient isotopic tracing with /sup 13/C, /sup 18/O, and D. A mechanism is proposed based on computer modeling which takes into account results from a wide variety of data. Evidence is presented that rate controlling steps involve hydrogenolysis of chemisorbed CH/sub x/ species (x = 0 to 3) rather than only the splitting of carbon monoxide or the formation of an enolic intermediate. Carbon dioxide formation appears to occur directly rather than through the water gas shift reaction. The computer program enables estimates to be made of concentrations of intermediates as well as velocities of individual steps in the mechanism. Under reaction conditions predominant adsorbed species appear to be carbidic carbon plus hydrogenated hydrocarbon intermediates.

• OSTI ID: 6872317
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 65:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

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10 SYNTHETIC FUELS
ALKANES
CARBON 13
CARBON COMPOUNDS
CARBON ISOTOPES
CARBON MONOXIDE
CARBON OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
DEUTERIUM
ELEMENTS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
HYDROCARBONS
HYDROGEN ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
KINETICS
LIGHT NUCLEI
METALS
METHANATION
METHANE
NICKEL
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
OXIDES
OXYGEN 18
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
PRODUCTION
REACTION KINETICS
STABLE ISOTOPES
TRACER TECHNIQUES
TRANSITION ELEMENTS