Deactivation Behavior of Co/SiC Fischer–Tropsch Catalysts by Formation of Filamentous Carbon

Abstract

Silicon carbide (SiC) having high thermal conductivity and macro-porosity was investigated for the Fischer–Tropsch Synthesis (FTS) reaction over Co-based catalysts in order to elucidate its support effects by surface modification with alumina. Even at a low temperature of around 230 °C, filamentous carbon formation was observed on the unmodified Co/SiC catalyst possessing large cobalt crystallites with a weak metal–support interaction. On the contrary, the cobalt catalyst supported on the alumina-modified SiC was found to be superior with respect to the CO conversion and stability. Even though the dispersion of cobalt oxides on the alumina-modified SiC support was not significantly improved, the remarkable performance improvements of the alumina-modified Co/SiC catalyst were mainly attributed to the enhanced metal–support interaction by the added alumina which suppressed the filamentous carbon formation.

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Acknowledgments

This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) under “Energy Efficiency & Resources Programs” with Project number of 2011T100200023. The authors would like to acknowledge the financial support from the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST; 2011-0009003 and 2012R1A2A2A02013876).

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Correspondence to Myung-June Park or Jong Wook Bae.

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Lee, B., Koo, H.M., Park, MJ. et al. Deactivation Behavior of Co/SiC Fischer–Tropsch Catalysts by Formation of Filamentous Carbon. Catal Lett 143, 18–22 (2013). https://doi.org/10.1007/s10562-012-0936-8

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Keywords

  • Fischer–Tropsch synthesis
  • Cobalt
  • Silicon carbide
  • Alumina modification
  • Filamentous carbon
  • Deactivation