Pulverization mechanism of hydrogen storage alloys on microscale packing structure

Masahiko Okumura, Ayaka Ikado, Yasuhiro Saito, Hideyuki Aoki, Takatoshi Miura, Yoshiaki Kawakami

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


In-situ and transient visualizations of the packing structure of a hydrogen storage alloy bed are carried out using an X-ray computed tomography (CT) system. The packing structure is clearly observed on the microscale using the CT system. When the alloy bed is subjected to hydrogen absorption-desorption cycles, the pulverization progresses from the lower to the upper regions of the bed. After several hydrogen absorption-desorption cycles, the packing structure in the lower region of the bed changes and the microstructural void decreases slightly. Based on these results, we propose a pulverization mechanism of the packed bed in which the friction between particles affects the pulverization process.

Original languageEnglish
Pages (from-to)10715-10723
Number of pages9
JournalInternational Journal of Hydrogen Energy
Issue number14
Publication statusPublished - 2012 Jul


  • Computed tomography
  • Metal hydride
  • Packed bed
  • Pulverization

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology


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