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

  • 제17권1호
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  • Pages.21-30
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  • 2006
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  • 1738-7264(pISSN)
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  • 2288-7407(eISSN)
한국수소및신에너지학회 (The Korean Hydrogen and New Energy Society)
권호 표지

$M/Fe_2O_3$ (M = Rh, Ce 및 Zr) 혼합 산화물의 산화-환원을 이용한 수소 저장 특성

Hydrogen Storage Characteristics Using Redox of $M/Fe_2O_3$ (M = Rh, Ce and Zr) Mixed Oxides

  • Ryu, Jae-Chun (Department of Fine Chemicals Engineering & Chemistry, Chungnam, National University) ;
  • Lee, Dong-Hee (Department of Fine Chemicals Engineering & Chemistry, Chungnam, National University) ;
  • Kim, Young-Ho (Department of Fine Chemicals Engineering & Chemistry, Chungnam, National University) ;
  • Yang, Hyun-Soo (Department of Fine Chemicals Engineering & Chemistry, Chungnam, National University) ;
  • Park, Chu-Sik (Korea Institute of Energy Research) ;
  • Wang, Gab-Jin (Korea Institute of Energy Research) ;
  • Kim, Jong-Won (Korea Institute of Energy Research)
  • 발행 : 2006.03.15
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초록

[ $M/Fe_2O_3$ ] (M=Rh, Ce and Zr) mixed oxides were prepared using urea method to develop a medium for chemical hydrogen storage by their redox cycles. And their redox behaviors by repeated cycles were studied using temperature programmed reaction(TPR) technique. Additives such as Rh, Ce and Zr were added to iron oxides in order to lower the reaction temperature for reduction by hydrogen and re-oxidation by water-splitting. From the results, concentration of urea used as a precipitant had little effect on particle size and reduction property of iron oxide. TPR patterns of iron oxide consisted of two reduction peaks due to the course of $Fe_2O_3\;{\rightarrow}\;Fe_3O_4\;{\rightarrow}\;Fe$. The results of repeated redox tests showed that Rh added to iron oxide have an effect on lowering the re-oxidation temperature by water-splitting. Meanwhile, Ce and Zr additives played an important role in prevention of deactivation by repeated cycles. Finally, Fe-oxide(Rh, Ce, Zr) sample added with Rh, Ce and Zr showed the lowest re-oxidation temperature by water-splitting and maintained high $H_2$ recovery in spite of the repeated redox cycles. Consequently, it is expected that Fe-oxide(Rh, Ce, Zr) sample can be a feasible medium for chemical hydrogen storage using redox cycle of iron oxide.

키워드

참고문헌

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