Catalytic activities and coking resistance of Ni/perovskites in steam reforming of methane

Kohei Urasaki, Yasushi Sekine, Sho Kawabe, Eiichi Kikuchi, Masahiko Matsukata

Research output: Contribution to journalArticle

125 Citations (Scopus)

Abstract

Steam reforming of methane for the purpose of hydrogen production was performed using nickel catalysts supported on a variety of perovskites, including LaAlO3, LaFeO3, SrTiO3, BaTiO 3, La0.4Ba0.6Co0.2Fe 0.8O3-8, to compare the catalytic activity and resistance to coking of these catalysts to those of the conventional Ni/α-Al 2O3 catalyst. Ni/LaAlO3 and Ni/SrTiO 3 showed high catalytic activities among the Ni/ perovskites and longer-term stabilities than the conventional catalyst. Temperature programmed oxidation of carbon deposited on used catalysts revealed that inactive carbon species detected on Ni/α-Al2O3 were not formed in the case of Ni/LaAlO3. The results of temperature programmed reduction confirmed that consumption and recovery of the lattice oxygen in perovskites occurred during the reaction, and that the reducibility of perovskites had a great impact on the steam reforming activity. The lattice oxygen in perovskites is considered to play important roles in promoting the oxidation of CH, fragments adsorbed on metallic nickel.

Original languageEnglish
Pages (from-to)23-29
Number of pages7
JournalApplied Catalysis A: General
Volume286
Issue number1
DOIs
Publication statusPublished - 2005 May 26

Keywords

  • Coking
  • Hydrogen
  • Lattice oxygen
  • Ni/BaTiO
  • Ni/LaAlO
  • Ni/LaBaCoFeO
  • Ni/LaFeO
  • Ni/SrTiO
  • Steam reforming of methane

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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