Steam reforming of toluene over perovskite-supported Ni catalysts

Yasushi Sekine*, Daiki Mukai, Yuki Murai, Satoshi Tochiya, Yoshiyuki Izutsu, Kei Sekiguchi, Naomi Hosomura, Hirohisa Arai, Eiichi Kikuchi, Yukihiro Sugiura

*この研究の対応する著者

研究成果: Article査読

80 被引用数 (Scopus)

抄録

Hydrogen production by steam reforming of toluene as a model aromatic hydrocarbon has been investigated with various Ni/perovskite catalysts. Among them, Ni/LaAlO3 catalyst showed high catalytic activity. Partial substitution of the La site of LaAlO3 support with other elements (Sr, Ba or Ca) was conducted for the Ni/LaAlO3 catalyst, and substitution with 30% Sr promoted catalytic activity and selectivity to hydrogen. Optimization for the Ni loading amount over Ni/La0.7Sr 0.3AlO3-δ catalyst revealed that 5 wt% Ni/La 0.7Sr0.3AlO3-δ had the highest toluene conversion and the smallest amount of carbon deposition. To elucidate the role of doped Sr, the catalytic natures of Sr-substituted catalyst Ni/La 0.7Sr0.3AlO3-δ and Sr-supported catalyst Ni/Sr/LaAlO3 were compared. Results show that Sr-ions should be incorporated in the LaAlO3 perovskite structure to show high catalytic performance. Based on results of transient response test with H 218O on Ni/La0.7Sr0.3AlO 3-δ, Ni/Sr/LaAlO3, and Ni/LaAlO3 at reaction temperature of 873 K, the formation of 18O-products was observed only on Ni/La0.7Sr0.3AlO3-δ catalyst derived from redox between the lattice oxygen in the perovskite and water. Lattice oxygen in the La0.7Sr0.3AlO 3-δ support worked as active oxygen species to enhance its catalytic nature.

本文言語English
ページ(範囲)160-167
ページ数8
ジャーナルApplied Catalysis A: General
451
DOI
出版ステータスPublished - 2013 1月 31

ASJC Scopus subject areas

  • 触媒
  • プロセス化学およびプロセス工学

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