Highly active and stable Co/La0.7Sr0.3AlO3-δ catalyst for steam reforming of toluene

Kent Takise, Takuma Higo, Daiki Mukai, Shuhei Ogo, Yukihiro Sugiura, Yasushi Sekine

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We investigated steam reforming of toluene as a model compound of aromatic hydrocarbons included in biomass tar over Co supported La0.7Sr0.3AlO3-δ (LSAO), perovskite oxide. Ni-supported LSAO catalyst has shown high activity and coke resistance from the redox property of lattice oxygen in/on the LSAO support. Co is known as an active metal for this reaction, so Co/LSAO catalyst was investigated in this work. Co/LSAO catalyst, which showed high steady-state activity and stability, was characterized using H2 18O isotopic transient response tests, STEM, FT-IR, Arrhenius plot and partial pressure dependence to elucidate high and stable catalytic activity. In situ FT-IR measurements revealed that reaction intermediates on Co/LSAO desorbed at 873K or lower temperatures. Although redox property of lattice oxygen did not change at around 848K based on isotopic transient tests, the Arrhenius plots indicate that the rate-determining step changed at around 848K because of reaction intermediate decomposition desorption. Fast reaction and desorption of absorbed intermediates on Co/LSAO enable catalytic stability during toluene steam reforming.

Original languageEnglish
JournalCatalysis Today
DOIs
Publication statusAccepted/In press - 2015 Jun 29

Fingerprint

Reaction intermediates
Arrhenius plots
Steam reforming
Toluene
Desorption
Oxygen
Tars
Aromatic Hydrocarbons
Catalysts
Aromatic hydrocarbons
Tar
Catalyst supports
Coke
Transient analysis
Partial pressure
Perovskite
Oxides
Catalyst activity
Biomass
Metals

Keywords

  • Co catalyst
  • Hydrogen production
  • Perovskite oxide
  • Stable catalytic activity
  • Steam reforming of toluene
  • Surficial adsorption property

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Cite this

Highly active and stable Co/La0.7Sr0.3AlO3-δ catalyst for steam reforming of toluene. / Takise, Kent; Higo, Takuma; Mukai, Daiki; Ogo, Shuhei; Sugiura, Yukihiro; Sekine, Yasushi.

In: Catalysis Today, 29.06.2015.

Research output: Contribution to journalArticle

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AU - Higo, Takuma

AU - Mukai, Daiki

AU - Ogo, Shuhei

AU - Sugiura, Yukihiro

AU - Sekine, Yasushi

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AB - We investigated steam reforming of toluene as a model compound of aromatic hydrocarbons included in biomass tar over Co supported La0.7Sr0.3AlO3-δ (LSAO), perovskite oxide. Ni-supported LSAO catalyst has shown high activity and coke resistance from the redox property of lattice oxygen in/on the LSAO support. Co is known as an active metal for this reaction, so Co/LSAO catalyst was investigated in this work. Co/LSAO catalyst, which showed high steady-state activity and stability, was characterized using H2 18O isotopic transient response tests, STEM, FT-IR, Arrhenius plot and partial pressure dependence to elucidate high and stable catalytic activity. In situ FT-IR measurements revealed that reaction intermediates on Co/LSAO desorbed at 873K or lower temperatures. Although redox property of lattice oxygen did not change at around 848K based on isotopic transient tests, the Arrhenius plots indicate that the rate-determining step changed at around 848K because of reaction intermediate decomposition desorption. Fast reaction and desorption of absorbed intermediates on Co/LSAO enable catalytic stability during toluene steam reforming.

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KW - Surficial adsorption property

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