Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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Two-step thermochemical cycles for hydrogen production using NiFe2O4/m-ZrO2 and CeO2 devices

NiFe2O4/m-ZrO2와 CeO2를 이용한 고온 태양열 열화학 싸이클의 수소 생산

  • Kim, Chul-Sook (Dept. of Mechanical Engineering, Graduate School, Inha University) ;
  • Cho, Ji-Hyun (Dept. of Mechanical Engineering, Graduate School, Inha University) ;
  • Kim, Dong-Yeon (Dept. of Mechanical Engineering, Graduate School, Inha University) ;
  • Seo, Tae-Beom (Dept. of Mechanical Engineering, Graduate School, Inha University)
  • 김철숙 (인하대학교 대학원 기계공학과) ;
  • 조지현 (인하대학교 대학원 기계공학과) ;
  • 김동연 (인하대학교 대학원 기계공학과) ;
  • 서태범 (인하대학교 대학원 기계공학과)
  • Received : 2013.02.15
  • Accepted : 2013.03.22
  • Published : 2013.04.30
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Abstract

Two-step thermochemical cycle using ferrite-oxide($Fe_2O_4$) device was investigated. The $H_2O$(g) was converted into $H_2$ in the first experiment which was performed using a dish type solar thermal system. However the experiment was lasted only for 2 cycles because the metal oxide device was sintered and broken down. Another problem was that the reaction was taken place mainly on a side of the metal oxide device. The m-$ZrO_2$, which was widely known as a material preventing sintering, was applied on the metal oxide device. The ferrite loading rate and the thickness of the metal oxide device were increased from 10.67wt% to 20wt% and from 10mm to 15mm, respectively. The chemical reactor having two inlets was designed in order to supply the reactants uniformly to the metal oxide device. The second-experiment was lasted for 5 cycles, which was for 6 hours. The total amount of the $H_2$ production was 861.30ml. And cerium oxide($CeO_2$) device was used for increasing $H_2$ production rate. $CeO_2$ device had low thermal resistance, however, more $H_2$ production rate than $Fe_2O_4$ device.

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References

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