Influence of the Support on the Activity and Selectivity of High dispersion Fe Catalysts in the Fischer-Tropsch Reaction
作者： Maria V Cagnoli , Sergio G Marchetti , Norma G Gallegos , Ana M Alvarez , Roberto C Mercader
DOI: 10.1016/0021-9517(90)90154-C
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摘要: In order to study the influence of support on high dispersion catalysts used for CO hydrogenation reaction, two catalysts, Fe/SiO{sub 2} and Fe/Al{sub 2}O{sub 3}, were prepared by dry impregnation method. Selective chemisorption CO, volumetric oxidation, Moessbauer spectroscopy determine Fe species present as well metallic crystal size, degree dispersion, reduction percentage. The presence small Fe{sup 0} crystallites with was determined in both catalysts. Reaction rates measured a differential reactor significant differences, about one magnitude less Al{sub 3} than SiO{sub supported found methane turnover frequencies. They are attributed interaction between metal supports. selectivity differences is also discussed connection distinct surface properties.
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