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The Properties of the Several Metal Oxides in the Water-splitting for H2 Production  

Son, Hyun-Myung (Hydrogen Energy Research Center, Korea Institute of Energy Research)
Park, Chu-Sik (Hydrogen Energy Research Center, Korea Institute of Energy Research)
Lee, Sang-Ho (Hydrogen Energy Research Center, Korea Institute of Energy Research)
Hwang, Gab-Jin (Hydrogen Energy Research Center, Korea Institute of Energy Research)
Kim, Jong-Won (Hydrogen Energy Research Center, Korea Institute of Energy Research)
Lee, Jin-Bae (Hydrogen Energy Research Center, Korea Institute of Energy Research)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.14, no.3, 2003 , pp. 268-275 More about this Journal
Abstract
The water-splitting process by the metal oxides using solar heat is one of the hydrogen production method. The hydrogen production process using the metal oxides (NiFe2O4/NiAl2O4,CoFe2O4/CoAl2O4, CoMnNiFerrite, CoMnSnFerrite, CoMnZnFerrite, CoSnZnFerrite) was carried out by two steps. The first step was carried out by the CH4-reduction to increase activation of metal oxides at operation temperature. And then, it was carried out the water-splitting reaction using the water at operation temperature for the second step. Hydrogen was produced in this step. The production rates of H2 were 110, 160, 72, 29, 17, $21m{\ell}/hr{\cdot}g-_{Metal\;Oxide}$ for NiFe2O4/NiAl2O4, CoFe2O4/CoAl2O4, CoMnNiFerrite, CoMnSnFerrite, CoMnZnFerrite, CoSnZnFerrite respectively in the second step. CoFe2O4/CoAl2O4 had higher H2 production rate than the other metal oxides.
Keywords
Water-splitting process; Metal oxides; Hydrogen;
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