Modification of Co/TiO2 for dry reforming of methane at 2 MPa by Pt, Ru or Ni

Katsutoshi Nagaoka, Kazuhiro Takanabe, Ken Ichi Aika*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

127 Scopus citations

Abstract

Influences of an addition of trace amounts of Pt (Pt/Co = 0.005-0.05 in atomic ratio) or Ru (Ru/Co = 0.01-0.05) and of replacement of Co by Ni (Ni:Co = 1:99-100:0) to 0.5wt.% Co/TiO2 have been investigated for the dry reforming of methane at 2MPa. Co/TiO2 reduced at 1123K showed slow deactivation due to oxidation of Co. The addition of noble metals improved the catalytic stability of Co/TiO2 drastically. The strong resistant nature of Co/TiO2 to coke deposition was also retained by the catalysts. TPR revealed that noble metals improved the reducibility of cobalt oxide. The replacement of Co by a small amount of Ni also enhanced the catalytic stability of Co/TiO2, but replacement by an excess of Ni resulted in the decrease of catalytic stability because of coking. CoNi/TiO2 with an optimum Co:Ni ratio of 90:10 presented high stability with only an insignificant amount of coke deposition under 2MPa, where coke deposition is highly favorable.

Original languageEnglish (US)
Pages (from-to)151-158
Number of pages8
JournalApplied Catalysis A: General
Volume268
Issue number1-2
DOIs
StatePublished - Aug 10 2004

Keywords

  • Co/TiO
  • Deactivation by metal oxidation
  • Effect of nickel
  • Effect of noble metals
  • High pressure
  • Methane dry reforming

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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