Steam reforming of ethanol over Co/La1-xSrxBO3 (B=Al, Cr, Mn, Fe) catalysts

Kohei Urasaki, Yoshie Fukuda, Yasushi Sekine, Masahiko Matsukata, Eiichi Kikuchi

Research output: Contribution to journalReview article

15 Citations (Scopus)

Abstract

The steam reforming of ethanol for producing hydrogen was evaluated over 5 wt % Co catalysts supported on perovskite-type oxides, La1-xSrxBO3 (B=Al, Cr, Mn, Fe, x=0-0.2) at 823 K. Co/LaAlO3 showed higher catalytic activity and stability than Co catalysts supported on LaCrO3, LaFeO3 and LaMnO3. The molar La/Al ratio significantly influenced the stability of Co/LaAlO3 catalyst and a molar La/Al ratio of 1:1 was the most suitable, suggesting that the properties of the perovskite structure are important in the catalytic activity and stability. Partial substitution of Sr2+ for La3+ in LaAlO3 led to further remarkable improvement of catalytic activity and hydrogen yield. Enhanced mobility of lattice oxygen in La1-xSrxAlO3-δ allows more frequent participation in the oxidation of intermediates over metallic cobalt, leading to both high catalytic activity and stability of Co/La1-xSrxAlO3-δ in comparison with Co/LaAlO3.

Original languageEnglish
Pages (from-to)83-87
Number of pages5
JournalJournal of The Japan Petroleum Institute
Volume51
Issue number2
DOIs
Publication statusPublished - 2008 May 22

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Keywords

  • Cobalt catalyst
  • Ethanol
  • Hydrogen production
  • Lattice oxygen
  • Perovskite
  • Steam reforming

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology

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