Oxidative steam reforming of methane over Ni/α-Al2O3 modified with trace noble metals

Kaori Yoshida, Noorjahan Begum, Shin ichi Ito, Keiichi Tomishige

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

Ni catalysts supported on α-Al2O3 modified with small amounts of noble metals (Pd, Pt, Au, Ir, Rh and Ru) were prepared by a co-impregnation method to investigate catalytic performance and catalyst bed temperature profile in oxidative steam reforming of methane. Modification of the Ni catalyst with noble metals was effective to decreasing the bed temperature near the catalyst bed inlet, and it is found that Pd is the most effective modifier among the noble metals. Additive effect of Pd has some aspects: the increase of the metal dispersion, suppression of oxidation and enhancement of reducibility judging from characterization results of H2 adsorption and evaluation by pulse reaction technique using O2 and H2. The extended X-ray absorption fine structure (EXAFS) analysis suggests that the excellent properties can be due to small Pd metallic cluster interacted with Ni particles.

Original languageEnglish
Pages (from-to)186-192
Number of pages7
JournalApplied Catalysis A: General
Volume358
Issue number2
DOIs
Publication statusPublished - 2009 May 1
Externally publishedYes

Keywords

  • Hot spot
  • Methane
  • Nickel
  • Noble metal
  • Oxidative reforming
  • Steam reforming
  • Thermography

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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