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Journal of Materials Science

, Volume 29, Issue 3, pp 768–772 | Cite as

Methanation of carbon deposited directly from CO2 on rhodium-bearing activated magnetite

  • K. Nishizawa
  • H. Kato
  • K. Mimori
  • T. Yoshida
  • N. Hasegawa
  • M. Tsuji
  • Y. Tamaura
Papers

Abstract

Methanation reactivity was studied for the surface carbon deposited from CO2 on the surface of Rh-bearing activated magnetite. The most active material (Rh=0.83 wt %) for methanation was prepared by the impregnation method at 60°C and showed 98% conversion at 300°C. The surface carbon was composed of elemental carbon (α-carbon) and polymerized carbon (β-carbon), the proportion being dependent on the density of carbon deposited. In temperature-programmed surface reaction, the extent of conversion of the α- and β-carbon to CH4 was 0.34 (α-carbon) and 0.53 (β-carbon), respectively, and the total conversion was 0.87. This result indicates that not only elemental carbon but polymerized carbon (β-carbon) could be converted to CH4 on the Rh-bearing activated (α-carbon) magnetite, whereas β-carbon is not hydrogenated on activated magnetite.

Keywords

Polymer Methanation Magnetite Active Material Surface Reaction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Y. Tamaura and M. Tabata, Nature 346 (1990) 255.CrossRefGoogle Scholar
  2. 2.
    K. Nishizawa, T. Kodama, M. Tabata, T. Yoshida and Y. Tamaura, J. Chem. Soc. Faraday Trans. 88 (1992) 2771.CrossRefGoogle Scholar
  3. 3.
    K. Akanuma, M. Tabata, N. Hasegawa, M. Tsuji, Y. Tamaura, Y. Nakahara and S. Hoshino, J. Mater. Chem. 3 (1993) 943.CrossRefGoogle Scholar
  4. 4.
    K. Akanuma, K. Nishizawa, T. Kodama, M. Tabata, K. Mimori, T. Yoshida and Y. Tamaura, J. Mater. Sci. 28 (1993) 860.CrossRefGoogle Scholar
  5. 5.
    M. Tsuji, K. Nishizawa, T. Yoshida and Y. Tamaura, J. Mater. Sci., submitted.Google Scholar
  6. 6.
    Y. Tamaura, S. Mechaimonchit and T. Kastura, J. Inorg. Nucl. Chem. 43 (1980) 671.CrossRefGoogle Scholar
  7. 7.
    T. Katsura, Y. Tamaura and G. S. Chyo, Bull. Chem. Soc. Jpn 52 (1979) 96.CrossRefGoogle Scholar
  8. 8.
    Y. Tamaura and K. Nishizawa, Energy Convers. Mgmt. 33 (1992) 573.CrossRefGoogle Scholar

Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • K. Nishizawa
    • 1
    • 2
  • H. Kato
    • 1
    • 2
  • K. Mimori
    • 1
    • 2
  • T. Yoshida
    • 1
    • 2
  • N. Hasegawa
    • 1
    • 2
  • M. Tsuji
    • 1
    • 2
  • Y. Tamaura
    • 1
    • 2
  1. 1.Department of ChemistryResearch Centre for Carbon Recycling and UtilizationTokyo
  2. 2.Institute of TechnologyMeguro-Ku, TokyoJapan

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