Adsorption of hydrogen and deuterium on A-type zeolites at 77 K after various heat treatments

Norihiro Ikemoto*, Tomohiko Kawakami, Kazuo Yonehara, Yuri Natori, Katsuyoshi Tatenuma, Masanori Hara

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Molecular sieves (MSs) are a potentially useful means of hydrogen isotope recovery as well as the temporary storage and supply of such isotopes. In this study, the hydrogen adsorption isotherms for various MS samples were acquired after applying different water removal processes to activate the MSs. MS-3A sample was found not to adsorb hydrogen regardless of the activation conditions. MS-4A sample adsorbed hydrogen at 77 K after heating at 473, 513, and 673 K. However, the adsorption amount after heating at 473, 513 K was considerably less than that at 673 K. Consequently, heating at 673 K was required to activate this type of MS. In the case of an MS-5A sample, the presence of residual water had little effect on hydrogen isotope adsorption at 77 K. From these results, it is evident that MS-5A is the most suitable hydrogen adsorption material because it is readily activated and is less affected by water adsorption.

Original languageEnglish
Article number111701
JournalFusion Engineering and Design
Volume158
DOIs
StatePublished - 2020/09

Keywords

  • Adsorption isotherm
  • Cryogenic adsorption
  • DT fuel cycle
  • Molecular sieve

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • General Materials Science
  • Mechanical Engineering

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