Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Two-Step Thermochemical Cycle with Supported $NiFe_2O_4$ for Hydrogen Production

지지체의 변화에 따른 Ni-페라이트의 2단계 열화학 사이클 반응 특성에 관한 연구

  • Kim, Woo-Jin (Department of Chemical Engineering, Chungnam National Univ.) ;
  • Kang, Kyoung-Soo (Hydrogen Energy Research Group, Korea Institute of Energy Research) ;
  • Kim, Chang-Hee (Hydrogen Energy Research Group, Korea Institute of Energy Research) ;
  • Choi, Won-Chul (Hydrogen Energy Research Group, Korea Institute of Energy Research) ;
  • Kang, Yong (Department of Chemical Engineering, Chungnam National Univ.) ;
  • Park, Chu-Sik (Hydrogen Energy Research Group, Korea Institute of Energy Research)
  • 김우진 (충남대학교 화학공학과) ;
  • 강경수 (한국 에너지 기술 연구원 수소에너지 연구 센터) ;
  • 김창희 (한국 에너지 기술 연구원 수소에너지 연구 센터) ;
  • 조원철 (한국 에너지 기술 연구원 수소에너지 연구 센터) ;
  • 강용 (충남대학교 화학공학과) ;
  • 박주식 (한국 에너지 기술 연구원 수소에너지 연구 센터)
  • Published : 2008.12.30
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Abstract

The two-step thermochemical cycle was examined on the $CeO_2$, YSZ, and $ZrO_2$-supported $NiFe_2O_4$ to investigate the effects of support material addition. The supported $NiFe_2O_4$ was prepared by the aerial oxidation method. Thermal reduction was conducted at 1573K and 1523K while water-splitting was carried out at 1073K. Supporting $NiFe_2O_4$ on $CeO_2$, YSZ and $ZrO_2$ alleviated the high-temperature sintering of iron-oxide. As a result, the supported $NiFe_2O_4$ exhibited greater reactivity and repeatability in the water-splitting cycle as compared to the unsupported $NiFe_2O_4$. Especially, $ZrO_2$-supported $NiFe_2O_4$ showed better sintering inhibition effect than other supporting materials, but hydrogen production amount was decreased as cycle repeated. In case of $CeO_2$-supported $NiFe_2O_4$, improvement of hydrogen production was found when the thermal reduction was conducted at 1573K. It was deduced that redox reaction of $CeO_2$ activated above 1573K.

Keywords

References

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