Enhancement of hydrogen absorption rate of Zr2Fe particles by NaOH pretreatment

Satoshi Fukada, Kiichi Tokunaga

研究成果: ジャーナルへの寄稿記事

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A comparative investigation was carried out to determine which manner of pretreatment with NaOH solutions, electroless Pd-plating and Cu-plating enhances the hydrogen absorption rate of Zr2Fe particles most greatly. The hydrogen effluent concentration from a bed packed with Zr2Fe particles pretreated with any of the above manners was compared with that from an as-received particle bed. Numerical calculations of two equations on the hydrogen material balance and the hydrogenation rate were fitted to the experimental effluent data, and the results were correlated in terms of the hydrogen absorption capacity and the mass-transfer coefficient. The preferred manner for enhancing the hydrogenation rate was found to be treatment with a 6 N NaOH solution. The packed bed of Zr2Fe particles pretreated with the NaOH solution can remove H2 in a H2-N2-Ar stream at room temperature down to a concentration < 1 ppm. The alkali pretreatment preferentially enhances the mass-transfer rate of the solid-phase side. The effect remained unchanged within at least eight hydrogenating-dehydrogenating cycles. The Pd-plating and Cu-plating were found to be ineffective for enhancing the hydrogen absorption rate of the Zr2Fe particles.

元の言語英語
ページ(範囲)189-197
ページ数9
ジャーナルFusion Engineering and Design
43
発行部数2
DOI
出版物ステータス出版済み - 12 1 1998

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All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

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