Exothermic hydrogen production system in supercritical water from biomass and usual domestic wastes with an exploitation of RuO2 catalyst

Yukihiro Izumizaki, Ki Chul Park, Tomoo Yamamura, Hiroshi Tomiyasu, Bungo Goda, Yasuhiko Fujii

研究成果: Article査読

7 被引用数 (Scopus)

抄録

This paper deals with a method of producing hydrogen from biomass and sewage disposals in supercritical water by use of ruthenium dioxides as a catalyst. Experiments were carried out under argon atmosphere with a batch reactor made of INCONEL625. Reaction temperatures and pressures were changed in the ranges of 400-500 °C and 30-50 MPa, respectively. The gas produced was quantitatively analyzed by on-line gas chromatography. In conclusion, considerably high ratios of hydrogen up to 38.5% were produced from the sewage disposals. This value was even higher than the hydrogen production ratios from other biomass: 15.0% from cellulose, 14.1% from pulp, 16.0% from waste paper, and 27.0% from paper sludge. The heat balance was calculated in the present reaction system using ruthenium oxide as the catalyst in supercritical water for the reaction of naphthalene and cellulose. The result showed that the total reaction was exothermic. This is rather surprising, because most of the hydrogen forming reactions are endothermic. The present result should be due to the excess heat derived by the partial formation of carbon dioxide.

本文言語English
ページ(範囲)438-442
ページ数5
ジャーナルProgress in Nuclear Energy
50
2-6
DOI
出版ステータスPublished - 2008 3月

ASJC Scopus subject areas

  • 原子力エネルギーおよび原子力工学
  • 安全性、リスク、信頼性、品質管理
  • エネルギー工学および電力技術
  • 廃棄物管理と処理

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