Changes in surface structure and composition of an iron catalyst of reduced or unreduced Fe/sub 2/O/sub 3/ during the reaction of carbon monoxide and hydrogen

Journal Article · Sat May 01 04:00:00 EDT 1982 · J. Catal.; (United States)

OSTI ID:6882235

Reymond, J P; Meriaudeau, P; Teichner, S J

Iron oxide (Fe/sub 2/O/sub 3/) prepared by decomposition of iron nitrate acquires a catalytic activity in the CO + H/sub 2/ (1 atm) reaction at 250 C even without any reduction pretreatment in H/sub 2/. The nonreduced catalyst and the reduced one have their surface and bulk compositions modified in different ways. In both cases the surface is covered by carbon and a small fraction of it is directly involved in the Fischer-Tropsch reaction with H/sub 2/, whereas the remainder is transformed into carbide not involved in the Fischer-Tropsch reaction or stays as inactive carbon. The formation of iron carbide is faster for the reduced sample and must be correlated with a higher rate of deactivation of this sample than of the nonreduced sample. A sequence of steps, different for the nonreduced and the reduced catalyst, is proposed, and accounts for the higher Fischer-Tropsch activity of the former material.

• Research Organization: Universite Claude Bernard (Lyon I), Cedex, France
• OSTI ID: 6882235
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 75:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALKANES
BINDING ENERGY
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
ELEMENTS
ENERGY
EXPERIMENTAL DATA
FISCHER-TROPSCH SYNTHESIS
HIGH TEMPERATURE
HYDROCARBONS
HYDROGEN
INFORMATION
IRON COMPOUNDS
IRON NITRATES
IRON OXIDES
MEDIUM PRESSURE
METHANATION
METHANE
NITRATES
NITROGEN COMPOUNDS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REDUCTION
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS