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Mössbauer study of CO-precipitated Fischer-Tropsch iron catalysts

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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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Authors and Affiliations

  1. Institute of Mining and Minerals Research, University of Kentucky, 40506-0107, Lexington, KY, USA

    K. R. P. M. Rao, Frank E. Huggins, Vikram Mahajan & Gerald P. Huffman

  2. Texas A&M University, 77843-3122, College Station, TX, USA

    D. B. Bukur

  3. Pittsburgh Energy Technology Center, U.S. Department of Energy, 15236, Pittsburgh, PA, USA

    V. U. S. Rao

Authors
  1. K. R. P. M. Rao
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  2. Frank E. Huggins
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  3. Vikram Mahajan
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  4. Gerald P. Huffman
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  5. D. B. Bukur
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  6. V. U. S. Rao
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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

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