Novel nickel catalysts based on spinel-type mixed oxides for methane and propane steam reforming

Ryuji Kikuchi, Misato Yokoyama, Shohei Tada, Atsushi Takagaki, Takashi Sugawara, S. Ted Oyama

Research output: Contribution to journalConference article

8 Citations (Scopus)

Abstract

Novel nickel catalysts based on magnesium aluminate spinel-type mixed oxides are developed as hydrocarbon reforming catalysts for hydrogen supply to polymer electrolyte fuel cells. The spinel catalysts were prepared by co-precipitation and the Pechini method, and the spinels prepared by the former method exhibited higher activity for methane steam reforming. The effect of spinel composition, Mg1-xNixAl2O4 (x=0.17, 0.35, 0.50, 0.70, 1) was investigated on the activity and resistance to carbon deposition in steam reforming reaction. The turnover frequency for methane steam reforming at a steam-to-carbon (S/C) ratio of 2 increased with increase in the x value from 0.17 to 0.35, and then gradually decreased with further increase in the nickel content. The carbon deposition tolerance of the spinel catalysts was examined in propane steam reforming at S/C=1 and 600°C. The propane conversion during the reaction was ca. 98% over all catalysts tested, and the amount of deposited carbon, determined as carbon dioxide by temperature programmed oxidation, was least at x=0.17, which is 1/8 of that deposited on a conventional Ni/γ-Al2O3 catalyst. The spinels with x≤0.5 exhibited smaller amounts of carbon deposition, and thus superior tolerance to deactivation.

Original languageEnglish
Pages (from-to)530-535
Number of pages6
JournalJOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Volume47
Issue number7 SPECIAL ISSUE
DOIs
Publication statusPublished - Jan 1 2014
Externally publishedYes
EventInternational Symposium on Innovative Materials for Processes in Energy Systems, IMPRES 2013 - Fukuoka, Japan
Duration: Sep 4 2013Sep 6 2013

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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