Hydrogen permeability of palladium alloy membrane at high temperatures in the impurity gases co-existing atmospheres

Atsushi Unemoto, A. Kaimai, T. Otake, Keiji Yashiro, Tatsuya Kawada, J. Mizusaki, T. Tsuneki, I. Yasuda

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

Hydrogen permeation measurements were carried out with Ag 23wt% Pd alloy membrane of 20μm in thickness so as to clarify the effect of co-existing gases on hydrogen permeability through the steam reforming reaction process. Co-introduction of impurity gases such as H2O, CO2, CO, CH4 with hydrogen did not affect hydrogen permeability of palladium alloy membrane at high temperatures (773K, 873K). The rate determining step was the bulk diffusion of H in the membrane. However, effects of co-existing gases were visible at low temperatures in H2-H2O, H 2-CO, H2-CO2, H2-CH4 atmospheres. Rate equation of surface reaction was obtained from the result of hydrogen permeation measurements. The results of performance simulation by the use of surface reaction rate equation suggested that the effect of impurity gases on hydrogen permeability was negligibly small at high temperatures.

本文言語English
ホスト出版物のタイトル16th World Hydrogen Energy Conference 2006, WHEC 2006
ページ3113-3121
ページ数9
出版ステータスPublished - 2006 12月 1
イベント16th World Hydrogen Energy Conference 2006, WHEC 2006 - Lyon, France
継続期間: 2006 6月 132006 6月 16

出版物シリーズ

名前16th World Hydrogen Energy Conference 2006, WHEC 2006
4

Other

Other16th World Hydrogen Energy Conference 2006, WHEC 2006
国/地域France
CityLyon
Period06/6/1306/6/16

ASJC Scopus subject areas

  • エネルギー工学および電力技術
  • 燃料技術

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