抄録
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.
本文言語 | English |
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ページ(範囲) | 83-87 |
ページ数 | 5 |
ジャーナル | Journal of The Japan Petroleum Institute |
巻 | 51 |
号 | 2 |
DOI | |
出版ステータス | Published - 2008 |
ASJC Scopus subject areas
- 燃料技術
- エネルギー工学および電力技術