Influence of the support on the activity and selectivity of high dispersion Fe catalysts in the Fischer-Tropsch reaction

Journal Article · Tue May 01 04:00:00 EDT 1990 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(90)90154-C· OSTI ID:6223893

Cagnoli, M V; Marchetti, S G; Gallegos, N G; Alvarez, A M; Mercader, R C; Yeramian, A A ^[1]

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1. Centro Investigacion y Desarrollo en Procesos Cataliticos, La Plata (Argentina) Facultad de Ciencias Exactas, La Plata (Argentina)

In order to study the influence of the support on high dispersion catalysts used for the CO hydrogenation reaction, two catalysts, Fe/SiO{sub 2} and Fe/Al{sub 2}O{sub 3}, were prepared by the dry impregnation method. Selective chemisorption of CO, volumetric oxidation, and Moessbauer spectroscopy were used to determine the Fe species present as well as the metallic crystal size, the degree of dispersion, and the reduction percentage. The presence of small Fe{sup 0} crystallites with high dispersion was determined in both catalysts. Reaction rates were measured in a differential reactor and significant differences, about one order of magnitude less for the Al{sub 2}O{sub 3} than for the SiO{sub 2} supported catalysts, were found in the methane turnover frequencies. They are attributed to the interaction between the metal and the supports. The selectivity differences is also discussed in connection with distinct surface properties.

• OSTI ID: 6223893
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 123:1; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010408* -- Coal
Lignite
& Peat-- C1 Processes-- (1987-)
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISORPTION
COMPARATIVE EVALUATIONS
CRYSTAL STRUCTURE
ELEMENTS
FISCHER-TROPSCH SYNTHESIS
HYDROGENATION
IRON
KINETICS
METALS
METHANATION
MOESSBAUER EFFECT
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
REACTION KINETICS
SEPARATION PROCESSES
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
SPECTROSCOPY
SURFACE PROPERTIES
TRANSITION ELEMENTS