High-pressure hydrogen permeability model for crystalline polymers

Hiroyuki Kanesugi, Keiko Ohyama, Hirotada Fujiwara, Shin Nishimura

研究成果: ジャーナルへの寄稿学術誌査読

8 被引用数 (Scopus)

抄録

Molded seal devices made of crystalline polymers are widely used in high-pressure hydrogen equipment. A method for evaluating high-pressure hydrogen permeability was recently reported; however, the evaluation cost is extremely high. To select suitable crystalline polymers for molded hydrogen seals or barrier devices, a high-pressure hydrogen permeability prediction method using the polymer structure and its conventional properties is required. In this study, we measured the pressure dependency of the hydrogen permeability of low-density polyethylene (LDPE), high-density polyethylene (HDPE), and polyamide 11 (PA11). We constructed the permeation model for crystalline polymers in terms of the tortuosity induced by their higher-order structures and free volume change in the amorphous region evaluated using PVT method for measuring the relationship between pressure (p), specific volume (v) and temperature (T) in the molten-solid state of a polymer. The results of the pressure dependency of hydrogen permeability were reproduced by the developed permeation model.

本文言語英語
ページ(範囲)723-739
ページ数17
ジャーナルInternational Journal of Hydrogen Energy
48
2
DOI
出版ステータス出版済み - 1月 5 2023

!!!All Science Journal Classification (ASJC) codes

  • 再生可能エネルギー、持続可能性、環境
  • 燃料技術
  • 凝縮系物理学
  • エネルギー工学および電力技術

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