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Hydrogen Storage Property of MgH2 Synthesized by Hydriding Chemical Vapor Deposition

Hydriding Chemical Vapor Deposition 방법으로 제조된 MgH2의 수소저장 특성

  • 박경덕 (동아대학교 대학원 신소재공학과) ;
  • 한정섭 (동아대학교 대학원 신소재공학과) ;
  • 김진호 (한국세라믹 기술원) ;
  • 김병관 ((주) 한국 에너지재료)
  • Received : 2011.05.26
  • Accepted : 2011.06.20
  • Published : 2011.06.30

Abstract

$MgH_2$ was synthesized by hydriding chemical vapor deposition (HCVD). In this study, we examined the hydrogen storage property of $MgH_2$ synthesized by HCVD. The results of pressure-composition-temperature (PCT) measurement showed that the HCVDed $MgH_2$ reversibly absorbed hydrogen as much as 6 wt%. Each hydrogenation rate was very greater than the conventional alloy methods. The reason was that the particle size made by HCVD was small as approximately 1 ${\mu}m$. The PCT of $MgH_2$ made by HCVD methode was similar to a commercial $MgH_2$. The ${\Delta}H$ and ${\Delta}S$ value are respectively -76.8 $kJ/mol{\cdot}H_2$ and -137.4 $kJ/mol{\cdot}H_2$. Mg made by HCVD methode was activated easily than commercial Mg. Also the initial reaction rate was faster than that of commercial $MgH_2$. 70% of the total storage were stored during 400s.

Keywords

References

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