Investigation of supported iron Fischer-Tropsch synthesis catalysts by Moessbauer spectroscopy

Journal Article · Tue May 01 04:00:00 EDT 1984 · J. Catal.; (United States)

OSTI ID:6704618

Tau, L M; Borcar, S; Bianchi, D; Bennett, C O

The carburization of the iron in a 10% Fe on Al/sub 2/O/sub 3/ (Alon-C) catalyst has been followed by Moessbauer spectroscopy. The studies were made mostly at 270-285/sup 0/C and the catalyst was exposed to CO/H/sub 2/ and CO/He gas mixtures. The decarburization by H/sub 2/ was also studied. The principal carbides found are x-carbide, Fe/sub 2.5/C, epsilon'-carbide, Fe/sub 2.2/C with a tendency for a preponderance of the latter at long reaction times. The carburization by CO is promoted by the presence of H/sub 2/, even in a small concentration. The promoting action of H/sub 2/ seems to be related to the ease of carburizing a particle with a well-reduced surface. Adding water to CO/H/sub 2/ slows the carburization rate without slowing the carbon deposition rate. Similar experiments with 10% Fe/SiO/sub 2/ (Cab-O-Sil) catalyst give similar results. Rates are somewhat reduced, but there is no qualitative change introduced by the different support.

• Research Organization: Univ. of Connecticut, Storrs
• OSTI ID: 6704618
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 87:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBURIZATION
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
FISCHER-TROPSCH SYNTHESIS
HARDENING
HIGH TEMPERATURE
IRON
METALS
OXIDES
OXYGEN COMPOUNDS
SPECTROSCOPY
SURFACE HARDENING
SURFACE TREATMENTS
TRANSITION ELEMENTS