Deactivation of nickel methanation catalysts induced by the decomposition of iron carbonyl. II. Interactions between iron and nickel

Journal Article · Tue Nov 01 00:00:00 EST 1983 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(83)90092-1· OSTI ID:5250094

Shen, W M; Dumesic, J A

Catalysts prepared by thermally decomposing Fe(CO)/sub 5/ on Al/sub 2/O/sub 3/ (alumina) powder or Ni/Al/sub 2/O/sub 3/ catalysts were studied using both methanation reaction kinetics measurements and in situ Moessbauer spectroscopy. Iron-induced shifts in the kinetic parameters of the methanation reaction over supported nickel catalysts are the consequence of both pore-mouth blocking of the alumina micropores by iron particles and the interaction of iron with nickel particles in the macropores of the support. The presence of nickel appears to facilitate the formation of zero-valent iron during the decompoition of Fe(CO)/sub 5/. In addition, Auger electron spectroscopy (AES) studies of model Ni/Al/sub 2/O/sub 3/ samples composed of nickel evaporated onto thin films of alumina demonstrated that, at low partial pressures, Fe(CO)/sub 5/ decomposes preferentially on nickel surfaces rather than on Al/sub 2/O/sub 3/. Besides pore-mouth blocking, iron-induced deactivation of nickel methanation catalysts can also be attributed to the deposition of carbon on the catalyst. 20 references, 4 figures, 2 tables.

• Research Organization: Univ. of Wisconsin, Madison
• DOE Contract Number: FG21-78ET12248
• OSTI ID: 5250094
• Journal Information: J. Catal.; (United States), Vol. 84:1
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALUMINIUM OXIDES
CATALYTIC EFFECTS
DEACTIVATION
MOESSBAUER EFFECT
SORPTIVE PROPERTIES
CARBON MONOXIDE
METHANATION
CATALYSTS
HYDROGEN
CHEMICAL REACTIONS
IRON COMPOUNDS
DECOMPOSITION
METHANE
CHEMICAL REACTION YIELD
NICKEL
AUGER ELECTRON SPECTROSCOPY
CARBONYLS
CATALYST SUPPORTS
CHEMICAL REACTION KINETICS
EXPERIMENTAL DATA
FILMS
HIGH TEMPERATURE
IRON 57
LOW PRESSURE
MEDIUM PRESSURE
MEDIUM TEMPERATURE
PARTIAL PRESSURE
POWDERS
PRESSURE DEPENDENCE
SAMPLE PREPARATION
SYNTHESIS GAS
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
ALKANES
ALUMINIUM COMPOUNDS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
DATA
ELECTRON SPECTROSCOPY
ELEMENTS
EVEN-ODD NUCLEI
FLUIDS
GASES
HYDROCARBONS
INFORMATION
INTERMEDIATE MASS NUCLEI
IRON ISOTOPES
ISOTOPES
KINETICS
METALS
NONMETALS
NUCLEI
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
SPECTROSCOPY
STABLE ISOTOPES
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YIELDS
090121* - Hydrocarbon Fuels- Chemical Synthesis- (1976-1989)
400201 - Chemical & Physicochemical Properties
400301 - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)