CO2 methanation catalysts prepared from amorphous Ni-Zr-Sm and Ni-Zr-misch metal alloy precursors

Michiaki Yamasaki, Mitsuru Komori, Eiji Akiyama, Hiroki Habazaki, Asahi Kawashima, Katsuhiko Asami, Koji Hashimoto

Research output: Contribution to journalConference article

52 Citations (Scopus)

Abstract

Nickel catalysts supported on nano-grained oxides have been prepared from amorphous Ni-Zr-Sm and Ni-Zr-Mm (Mm: misch metal) alloys and crystalline Ni-Sm and Ni-Mm alloys. These catalysts show higher catalytic activity for methanation of carbon dioxide than a conventionally prepared zirconia supported nickel catalyst. The catalytic activity of Ni-Zr-5 at% Sm catalysts increases with increase in nickel content, and is higher than the samarium-free Ni-Zr catalysts containing the same amount of nickel. The stabilization of tetragonal zirconia and the increase in the number of active surface nickel sites by addition of samarium to the nickel-rich catalysts leads to enhancement of catalytic activity. In the Ni-Zr-5 at% Mm catalysts, only the activity of the catalyst containing 60 at% nickel is enhanced in comparison with misch metal-free Ni-Zr catalysts. It is also found that Ni-Sm and Ni-Mm catalysts show activities as high as that of Ni-Zr catalyst, suggesting that samarium and misch metal oxides also act as good catalyst supports for methanation catalysts.

Original languageEnglish
Pages (from-to)220-226
Number of pages7
JournalMaterials Science and Engineering A
Volume267
Issue number2
DOIs
Publication statusPublished - 1999 Jul 31
EventProceedings of the 1998 5th International Symposium on Electrochemical/Chemical Reactivity of Novel Materials - Sendai, Jpn
Duration: 1998 Oct 41998 Oct 7

Keywords

  • Amorphous alloy precursors
  • Carbon dioxide
  • Methanation
  • Nickel catalysts
  • Samarium
  • Tetragonal zirconia

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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