Hydrogen production via steam-iron reaction using iron oxide modified with very small amounts of palladium and zirconia

Kohei Urasaki, Naoshi Tanimoto, Taito Hayashi, Yasushi Sekine, Eiichi Kikuchi, Masahiko Matsukata*

*この研究の対応する著者

研究成果: Article査読

71 被引用数 (Scopus)

抄録

We investigated hydrogen production by the steam-iron reaction using iron oxide modified with very small amounts of palladium and/or zirconia at a temperature of 723 K and under atmospheric pressure. Reduction of iron oxide with hydrogen and oxidation of partially reduced iron oxide with steam (Fe 3O4 + 4H2 ↔ 3Fe + 4H2O) were repeated in the range of reduction degree of 30-50 mol%. Changes in the weight of the samples were monitored using a tapered element oscillating microbalance (TEOM) to control the degree of reduction. Unmodified iron oxide caused significant deactivation due to sintering with increasing number of redox cycles. The addition of a very small amount (0.23 mol%) of palladium or zirconia onto the surface of the iron oxide enhanced the reduction and/or oxidation of the partially reduced iron oxide, which suppressed sintering. Palladium accelerated both the reduction and oxidation rates of partially reduced iron oxide, while zirconia increased only the oxidation rate. Addition of both palladium and zirconia together to the iron oxide resulted in marked enhancement of both reduction and oxidation.

本文言語English
ページ(範囲)143-148
ページ数6
ジャーナルApplied Catalysis A: General
288
1-2
DOI
出版ステータスPublished - 2005 7月 15

ASJC Scopus subject areas

  • 触媒
  • プロセス化学およびプロセス工学

フィンガープリント

「Hydrogen production via steam-iron reaction using iron oxide modified with very small amounts of palladium and zirconia」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル