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 2 18O 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.
| 元の言語 | English |
|---|---|
| ページ（範囲） | 160-167 |
| ページ数 | 8 |
| ジャーナル | Applied Catalysis A: General |
| 巻 | 451 |
| DOI | |
| 出版物ステータス | Published - 2013 1 31 |
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ASJC Scopus subject areas
- Catalysis
- Process Chemistry and Technology
これを引用
Steam reforming of toluene over perovskite-supported Ni catalysts. / Sekine, Yasushi; Mukai, Daiki; Murai, Yuki; Tochiya, Satoshi; Izutsu, Yoshiyuki; Sekiguchi, Kei; Hosomura, Naomi; Arai, Hirohisa; Kikuchi, Eiichi; Sugiura, Yukihiro.
：: Applied Catalysis A: General, 巻 451, 31.01.2013, p. 160-167.研究成果: Article
}
TY - JOUR
T1 - Steam reforming of toluene over perovskite-supported Ni catalysts
AU - Sekine, Yasushi
AU - Mukai, Daiki
AU - Murai, Yuki
AU - Tochiya, Satoshi
AU - Izutsu, Yoshiyuki
AU - Sekiguchi, Kei
AU - Hosomura, Naomi
AU - Arai, Hirohisa
AU - Kikuchi, Eiichi
AU - Sugiura, Yukihiro
PY - 2013/1/31
Y1 - 2013/1/31
N2 - 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 2 18O 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.
AB - 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 2 18O 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.
KW - Coke-formation
KW - Hydrogen production
KW - Lattice oxygen
KW - Perovskite oxide
KW - Steam reforming
UR - http://www.scopus.com/inward/record.url?scp=84873289143&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84873289143&partnerID=8YFLogxK
U2 - 10.1016/j.apcata.2012.11.005
DO - 10.1016/j.apcata.2012.11.005
M3 - Article
VL - 451
SP - 160
EP - 167
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
SN - 0926-860X
ER -