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Fischer–Tropsch Synthesis on SiC-Supported Cobalt Catalysts

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Abstract

Seven SiC supports provided by SICAT with different surface areas and pore volumes were impregnated with 12,5 wt% Co. H2-chemisorption, N2-adsorption, temperature programmed reduction and Fischer–Tropsch synthesis in a fixed-bed reactor at 483 K, 20 bar and H2/CO = 2.1 were performed in order to characterize and test the samples. The performances were compared with well characterized Co/Al2O3 and Co-Re/Al2O3 reference catalysts. The selectivity towards heavier hydrocarbons (C5+) was found to be moderately higher for the SiC supported catalysts while the site-time yields was 20 to 66 % lower than the Co-Re/Al2O3 catalyst. Elemental analysis showed the presence of several impurities in the SiC material. Alkali and alkaline earth elements, such as Na, K and Ca, are all known to lower the catalytic activity and also to influence the selectivity. It is proposed that these impurities in addition to sulfur and phosphorus known to be present in SiC, are responsible for the significantly lower catalytic activity of the SiC supported catalysts.

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Acknowledgments

We gratefully acknowledge the financial support from the Norwegian Research Council, Statoil, SINTEF and NTNU through the NRC project 190763 Biomass to liquid fuels. Statoil and SICAT are acknowledged for providing the reference CoRe/Al2O3 catalyst and SiC support, respectively.

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Author notes

  1. S. Håvik

    Present address: Statoil Mongstad, 5954, Mongstad, Norway

Authors and Affiliations

  1. Department of Chemical Engineering, Norwegian University of Science & Technology (NTNU), 7491, Trondheim, Norway

    A. Lillebø, E. A. Blekkan & A. Holmen

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  1. A. Lillebø
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  2. S. Håvik
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  3. E. A. Blekkan
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  4. A. Holmen
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Correspondence to A. Holmen.

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Lillebø, A., Håvik, S., Blekkan, E.A. et al. Fischer–Tropsch Synthesis on SiC-Supported Cobalt Catalysts. Top Catal 56, 730–736 (2013). https://doi.org/10.1007/s11244-013-0032-3

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