NiFe2O4/m-ZrO2와 CeO2를 이용한 고온 태양열 열화학 싸이클의 수소 생산

Two-step thermochemical cycle using ferrite-oxide(Fe2O4) device was investigated. The H2O(g) was converted into H2 in the first experiment which was performed using a dish type solar thermal system. However the experiment was lasted only for 2 cycles because the metal oxide device was sintered and broken down. Another problem was that the reaction was taken place mainly on a side of the metal oxide device. The m-ZrO2, which was widely known as a material preventing sintering, was applied on the metal oxide device. The ferrite loading rate and the thickness of the metal oxide device were increased from 10.67wt% to 20wt% and from 10mm to 15mm, respectively. The chemical reactor having two inlets was designed in order to supply the reactants uniformly to the metal oxide device. The second-experiment was lasted for 5 cycles, which was for 6 hours. The total amount of the H2 production was 861.30ml. And cerium oxide(CeO2) device was used for increasing H2 production rate. CeO2 device had low thermal resistance, however, more H2 production rate than Fe2O4 device.