Abstract
Mössbauer spectroscopy studies of precipitated Fischer-Tropsch (FT) iron catalysts, viz. 100 Fe/5 Cu/4.2 K/x SiO2, wherex=0,8, 16, 24, 25, 40, or 100, have shown that reduction of the oxide precursor in CO gives rise to χ-carbide Fe5C2 whose amount decreases with an increase of SiO2 content. The χ-carbide is converted into magnetite Fe3O4 while catalyzing the FT synthesis reaction. A correlation between FT activity and the content of χ-carbide in the catalysts was found, which indicated that χ-carbide is active for FT synthesis reaction.
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Rao, K.R.P.M., Huggins, F.E., Mahajan, V. et al. Mössbauer study of CO-precipitated Fischer-Tropsch iron catalysts. Hyperfine Interact 93, 1751–1754 (1994). https://doi.org/10.1007/BF02072940
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DOI: https://doi.org/10.1007/BF02072940