Hydrogenation of adsorbed carbon monoxide on supported platinum group metals

Journal Article · Tue Jan 01 04:00:00 EST 1980 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(80)90333-4· OSTI ID:5448260

Fujimoto, K; Kameyama, M; Kunugi, T

Hydrogenation of adsorbed carbon monoxide on supported platinum group metals was studied by in situ ir spectroscopy and reactive temperature-programmed desorption (RTD) methods using hydrogen as a carrier gas. The main product of the hydrogenation was methane. The RTD gave spectra for methane formation which showed peaks between 423 and 650 K depending on the metals. On alumina-supported metals the temperature of maximum methane formation was in the following order: Ru(420K) approx. = Rh(420K) < Pd(490 K) < Pt(560 K) < Ir (600 K). It agreed well with the order of catalytic activity for the hydrogenation of carbon monoxide, which had been referenced elsewhere. The ir spectra of the bridge, linear, and twin types of adsorbed CO were observed on Rh/Al/sub 2/O/sub 3/ or Ru/Al/sub 2/O/sub 3/. On both samples the bridge CO was hydrogenated at lower temperature than the linear CO to form hydrocarbons consisting mainly of methane. The twin CO on Rh/Al/sub 2/O/sub 3/ desorbed without being hydrogenated. Some adsorbed hydrocarbon species were observed on Ru/Al/sub 2/O/sub 3/ during hydrogenation. Adsorbed CO reacted easily with H/sub 2/O in the gas phase to form CO/sub 2/. 8 figures, 2 tables.

• Research Organization: Univ. of Tokyo, Japan
• OSTI ID: 5448260
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 61:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

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10 SYNTHETIC FUELS
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
CRYOGENIC FLUIDS
DATA
DATA FORMS
DESORPTION
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
GASES
HIGH TEMPERATURE
HYDROCARBONS
HYDROGEN
IN-SITU PROCESSING
IN-SITU RETORTING
INFORMATION
INFRARED SPECTRA
IRIDIUM
ISOLATED VALUES
MECHANICAL STRUCTURES
METALS
METHANATION
METHANE
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM
PLATINUM METALS
PROCESSING
REFRACTORY METALS
RETORTING
RHODIUM
RUTHENIUM
SPECTRA
SUPPORTS
SYNTHESIS GAS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS
YIELDS