Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

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

Redox Characteristics of $MO/Al_2O_3-ZrO_2$ [M=Ni and Cu] Mixed Metal Oxides

$MO/Al_2O_3-ZrO_2$ [M=Ni 및 Cu] 혼합 금속 산화물의 환원-산화 특성

  • Ryu, Jae-Chun (Department of Fine Chemicals Engineering & Chemistry, Chungnam National University) ;
  • Kim, Young-Ho (Department of Fine Chemicals Engineering & Chemistry, Chungnam National University) ;
  • Park, Chu-Sik (Korea Institute of Energy Research) ;
  • Hwang, Gab-Jin (Korea Institute of Energy Research) ;
  • Kim, Jong-Won (Korea Institute of Energy Research)
  • Published : 2005.03.15
Download PDF
⟨ Previous Next ⟩

Abstract

[ $MO/Al_2O_3-ZrO_2$ ](M=Ni and Cu) mixed metal oxides were prepared using sol-gel method in order to investigate the applicability to the 2-step thermo-chemical water splitting process and their redox behaviors were studied by temperature programmed reaction(TPR) from room temperature to 900$^{\circ}C$ under 5% $H_2$/Ar for the reduction and $H_2O$/Ar for the oxidation, respectively. From the results, peaks of the reduction and the oxidation on temperature were shifted with the change of crystalline phases due to the addition of $Al_2O_3$ and $ZrO_2$. The intensities of the peaks were also increased with the increase of contents of NiO or CuO that could be considered as active species. In addition, based on the observation of SEM images before and after the redox test, it seemed that $Al_2O_3-ZrO_2$ added prevented high temperature sintering of active metal components such as Ni (or Cu) on the surface and played a role of dispersing the active species homogeneously in solid solution of mixed oxides.

Keywords

References

  1. T. Nakamura, 'Hydrogen production from water utilizing solar heat at high temperature, Solar Energy, Vol. 19, 1977, pp. 467-475 https://doi.org/10.1016/0038-092X(77)90102-5
  2. A. Weidenkaff , A. Reller, A. Wokaun and A. Steinfeld, 'Thermogravimetric analysis of the ZnO/Zn water splitting cycle', Thermochem. Acta, Vol. 359, 2000, pp. 69-75 https://doi.org/10.1016/S0040-6031(00)00508-6
  3. K. Ehrensberger , A. Frei , P. Kuhn , H. Oswald and P. Hug, 'Comparative experimental investigations of the water splitting reaction with iron oxide Fel-yO and iron manganese oxides (Fel-xMnx)l-yO', Solid State Ionics, Vol. 78, 1995, pp. 151-160 https://doi.org/10.1016/0167-2738(95)00019-3
  4. C. S. Park, I. T. Seo, J. M. Kim, S. H. Lee and G. J. Hwang, 'Study on the Hydrogen Production using the Metal Oxide(Cu-Ferrite)', Trans. of the Korean Hydrogen and New Energy Society, Vol. 15, No.3, 2004, pp. 201-207
  5. T. Tamaura , A. Steinfeld, P. Kuhn and K. Ehrensberger, 'Production of solar hydrogen by a novel, 2-step, water-splitting thermochemical cycle', Energy, Vol. 20, No. 4, 1995, pp. 325-330 https://doi.org/10.1016/0360-5442(94)00099-O
  6. A. Steinfeld , S. Sanders and R. Ralumbo, 'Design aspects of solar thermochemical engineering-a case study, two-step water splitting cycle using the $Fe_{3}O_{4}/FeO$ redox system. Solar Energy, Vol. 65, No. 1, 1999, pp.43-53 https://doi.org/10.1016/S0038-092X(98)00092-9
  7. M. Lundberg, 'Model calculations on some feasible two-step water splitting processes. Int. J. Hydrogen Energy, Vol.18(5), 1993, pp. 369-376 https://doi.org/10.1016/0360-3199(93)90214-U
  8. E. Bilgen , M. Ducarroir , M. Foex, F. Sibieude and F. Trombe, 'Use of solar energy for direct and two-step water decomposition cycle', Int. J. Hydrogen Energy, Vol. 2, 1977, pp. 251-257 https://doi.org/10.1016/0360-3199(77)90021-0
  9. R. Palumbo , J. Lede , O. Boutin, E. Ricart , A. Steinfeld , S. Moller, A. Weidenkaff , E. Fletcher, J. Bielicki, 'The production of Zn from ZnO in a high-temperature solar decomposition quench process. I. The scientific framework for the process. Chem. Eng. Sci., Vol. 53, No. 14, 1998, pp. 2503-2517 https://doi.org/10.1016/S0009-2509(98)00063-3
  10. T. Kodama, 'High temperature solar chemistry for converting solar heat to chemical fuels', Progress in Enegy and Combustion Science, Vol 29, 2003, pp. 567-597 https://doi.org/10.1016/S0360-1285(03)00059-5
  11. K. Tanabe, M. Misono, Y. Ono and H. Hattori, 'New Solid Acids and Bases-Their Catalytic Properties', Elsevier, Yokyo, 1989
  12. Y. H. Kim, 'Redox property of metal oxides and their behavior in catalytic oxidation', Seoul national university, 1992, pp. 73-76
  13. M. Del Arco, A. Caballero, P. Malet and V. Rives, 'Effect of consecutive and alternative oxidation and reduction treatments on the interaction between titania (anatase and rutile) and copper.', J. Catal., 113, 1988, pp. 120-128 https://doi.org/10.1016/0021-9517(88)90242-4
  14. H. W. Chen, J. M. White and J. G. Ekerdt, 'Electronic effect of supports on copper catalysts.', J. Catal., Vol. 99, 1986, pp. 293-303 https://doi.org/10.1016/0021-9517(86)90354-4