The thermal reduction of metal oxides as part of a thermochemical two-step water-splitting cycle requires the development of a high-temperature solar reactor operating at . Direct solar energy absorption by metal-oxide particles provides direct efficient heat transfer to the reaction site. This paper describes the experimental results of a windowed small reactor using an internally circulating fluidized bed of reacting metal-oxide particles under direct solar-simulated Xe-beam irradiation. Concentrated Xe-beam irradiation directly heats the internally circulating fluidized bed of metal-oxide particles. (Ni-ferrite on zirconia support) particles are loaded as the working redox material and are thermally reduced by concentrated Xe-beam irradiation. In a separate step, the thermally reduced sample is oxidized back to Ni-ferrite with steam at . The conversion efficiency of ferrite reached 44% , which was achieved using the reactor at of incident Xe lamp power. The effects of preheating temperature and particle size on the performance of the reactor for thermal reduction using an internally circulating fluidized bed were evaluated.
New Solar Water-Splitting Reactor With Ferrite Particles in an Internally Circulating Fluidized Bed
Gokon, N., Takahashi, S., Yamamoto, H., and Kodama, T. (January 7, 2009). "New Solar Water-Splitting Reactor With Ferrite Particles in an Internally Circulating Fluidized Bed." ASME. J. Sol. Energy Eng. February 2009; 131(1): 011007. https://doi.org/10.1115/1.3027511
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