Catalytic steam reforming of biomass-derivatives for hydrogen production

Yasushi Sekine*

*この研究の対応する著者

研究成果: Conference contribution

抄録

Catalytic steam reforming of bio-ethanol and bio-tar for hydrogen production was studied. As for bio-ethanol steam reforming, Co-catalyst showed higher performance than others. Loading of 1-2 wt% K on Co/α-Al2O3 was effective for improving catalytic activity, hydrogen selectivity and suppressing byproduct (CH4, C2H4, and coke) formations. TEM measurements showed that the Co0-CoO core-shell structure was formed over Co/K/α-Al2O3 during ethanol steam reforming at 823 K, suggesting that the oxidized Co species (CoO) is a highly active species in ethanol steam reforming. In-situ IR measurements revealed that the adsorbed ethanol forms stable acetate species by K loading, which improves hydrogen selectivity. Applying electric field to the catalyst bed enabled low temperature hydrogen production. Pt/CeO2 catalyst showed high activity in an electric field even at 423 K. The supported platinum worked as an active site for the ethanol steam reforming. Ethanol conversion and H2 yield drastically increased with imposing the electric field, and apparent activation energies for three elementary reactions (ethanol dehydrogenation, acetaldehyde decomposition, and acetaldehyde steam reforming) were lowered by the electric field. For bio-tar steam reforming, Ni/perovskite catalysts showed excellent features including less coke formation. Ni/Al2O3 showed much coke formation, aggregated by oxidation or longer catalytic activity test, and lost its steam reforming activity by oxidation treatment. In contrast, Ni/La0.7Sr0.3AlO3-d catalyst showed high and stable steam reforming activity even after the oxidation treatment. Ni particles on Ni/La0.7Sr0.3AlO3-d retained the fine structure after oxidation treatment or reduction treatment.

本文言語English
ホスト出版物のタイトル28th Annual Saudi-Japan Symposium on Technology in Petroleum Refining and Petrochemicals 2018
出版社King Fahd University of Petroleum and Minerals
ページ6
ページ数1
ISBN(電子版)9781510877436
出版ステータスPublished - 2018
イベント28th Annual Saudi-Japan Symposium on Technology in Petroleum Refining and Petrochemicals 2018 - Dhahran, Saudi Arabia
継続期間: 2018 11 122018 11 13

出版物シリーズ

名前King Fahd University of Petroleum and Minerals, Research Institute - Annual Catalysts in Petroleum Refining and Petrochemicals Symposium Papers
2018-November

Conference

Conference28th Annual Saudi-Japan Symposium on Technology in Petroleum Refining and Petrochemicals 2018
国/地域Saudi Arabia
CityDhahran
Period18/11/1218/11/13

ASJC Scopus subject areas

  • 触媒
  • エネルギー工学および電力技術
  • 燃料技術
  • 化学 (全般)

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