Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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The Hydrogenation Behaviors of V-xAl (x=1, 5wt.%) Composites by Mechanical Alloying

기계적 합금화법으로 제조한 V-xAl (x=1, 5wt.%) 복합재료의 수소화 반응 거동

  • Kim, Kyeong-Il (Grad. School of Hydrogen Univ., Department of Materials Science and Engineering, Chungju National University) ;
  • Hong, Tae-Whan (Grad. School of Hydrogen Univ., Department of Materials Science and Engineering, Chungju National University)
  • 김경일 (충주대학교 신소재공학과/친환경에너지 부품 연구센터) ;
  • 홍태환 (충주대학교 신소재공학과/친환경에너지 부품 연구센터)
  • Received : 2011.07.29
  • Accepted : 2011.08.22
  • Published : 2011.08.30
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Abstract

Recently, one of the hydrogen production methods has attracted using dense metallic membrane. It has high hydrogen permeation and selectivity which hardly could adopt industrial product because of high cost, hydrogen embrittlment and thermal stability. Meanwhile, vanadium has high hydrogen solubility and it use to instead of Pd-Ag amorphous membrane. Aluminum carried out blocking hydrogen diffusion on grain boundary therefore protecting hydrogen embrittlement. Most of dense metallic membrane is solution diffusion mechanism. The solution diffusion mechanism was very similar hydrogen storing steps such as steps of metal hydride. Thus, V-Al composites were fabricated to use hydrogen induced mechanical alloying. The fabricated V-Al composites were characterized by XRD, SEM, EDS and simultaneous TG/DSC analyses. The hydrogenation behaviors were evaluated using a Sievert's type automatic PCT apparatus. The hydrogenation behaviors of V-Al composites was evaluated too low hydrogen stored capacity and fast hydrogenation kinetics. In PCI results, V-Al composites had low hydrogen solubility, in spite of that, hydrogen kinetics was calculated very fast and hydrogen absorption/desorption contents were same capacity.

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References

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