Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
권호 표지

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

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

  • 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)
  • Published : 2006.03.15
Download PDF
⟨ Previous Next ⟩

Abstract

[ $M/Fe_2O_3$ ] (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.

Keywords

References

  1. K. Otsuka, C. Yamada, T. Kaburagi, and S. Takenaka, 'Hydrogen Storage and Production by Redox of Iron Oxide for Polymer Electrolyte Fuel Cell Vehicles', Int. J. Hydrogen Energy, Vol. 28, 2003, p. 335 https://doi.org/10.1016/S0360-3199(02)00070-8
  2. K. Otsuka., T. Kaburagi, C. Yamada, and S. Takenaka, 'Chemical Storage of Hydrogen by Modified Iron Oxides', Journal of Power Sources, Vol. 122, 2003, p. 111 https://doi.org/10.1016/S0378-7753(03)00398-7
  3. S. Takenaka, K. Nomura, N. Hanaizumi, and K. Otsuka, 'Storage and Formation of Pure Hydrogen Mediated by the Redox of Modified Iron Oxides', Applied Catalysis A: General, Vol. 282, 2005, p. 333 https://doi.org/10.1016/j.apcata.2004.12.028
  4. S. Takenaka, T. Kaburagi, C. Yamada, K. Nomura, and K. Otsuka, 'Storage and Supply of Hydrogen by Means of the Iron Oxides Modified with Mo and Rh species', J. Catal., Vol. 228, 2004, p. 66 https://doi.org/10.1016/j.jcat.2004.08.027
  5. E. Unmuth, L. H. Schwartz , and J. B. Butt, 'Iron Alloy Fischer- Tropsch Catalysts: I. Oxidation-Reduction Studies of the Fe-Ni System', J. Catal., Vol. 61, 1980, p. 242 https://doi.org/10.1016/0021-9517(80)90360-7
  6. M. Shimokawabe, R. Furuichi, and T. Ishii, 'Influence of the Preparation History of u -$Fe_2O_3$ on Its Reactivity for Hydrogen Reduction', Thermochim. Acta, Vol. 28, 1979, p.287 https://doi.org/10.1016/0040-6031(79)85133-3
  7. J. Bessibres, A. Bessibres, and J. J. Heizmann, 'Iron Oxide Reduction Kinetics by Hydrogen' Int. J. Hydrogen Energy, Vol. 5, 1980, p. 585 https://doi.org/10.1016/0360-3199(80)90037-3
  8. M. V. C. Sastri, R. P. Viswanath, and B. Viswanathan, 'Studies on the Reduction of Iron Oxide with Hydrogen ', Int. J. Hydrogen Energy, Vol. 7, 1982, p. 951 https://doi.org/10.1016/0360-3199(82)90163-X