A two-step water-splitting thermochemical cycle using redox working material of iron-based oxide (ferrite) particles has been developed for converting solar energy into hydrogen. The two-step thermochemical cycle for producing a solar hydrogen from water requires a development of a high temperature solar-specific receiver-reactor operating at 1000–1500°C. In the present work, ferrite-loaded ceramic foams with a high porosity (7 cells per linear inch) were prepared as a water splitting device by applying ferrite/zirconia particles on a MgO-partially stabilized Zirconia (MPSZ) ceramic foam. The water splitting foam device was prepared using a new method of spin coating. A spin coating method we newly employed that has advantages of shortening preparation period and reducing of the coating process in comparison to previous preparation method reported. The water-splitting foam devices, thus prepared, were examined on hydrogen productivity and reactivity through a two-step thermochemical cycle. NiFe2O4/m-ZrO2/MPSZ and Fe3O4/c-YSZ/MPSZ foam devices were firstly tested for thermal reduction of ferrite using the laboratory scale receiver-reactor by a sun-simulator to simulate concentrated solar radiation. Subsequently, with another quartz reactor the light-irradiated device was reacted with steam by infrared furnace. As a result, it was possible to perform cyclic reactions over several times and to produce hydrogen through thermal-reduction at 1500°C and water-decomposition at 1100–1200°C. In further experiments, the NiFe2O4/m-ZrO2/MPSZ foam device was successfully demonstrated in a windowed single reactor for cyclic hydrogen production by solar-simulated Xebeam irradiation with input power of 1 kW. The NiFe2O4/m-ZrO2/MPSZ foam device produced hydrogen of 70–190μmol per gram of device through 6 cycles and reached ferrite conversion of 60% at a maximum.
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ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences
July 19–23, 2009
San Francisco, California, USA
Conference Sponsors:
- Advanced Energy Systems Division and Solar Energy Division
ISBN:
978-0-7918-4890-6
PROCEEDINGS PAPER
Ferrite-Loaded Ceramic Foam Devices Prepared by Spin-Coating Method for a Solar Two-Step Thermochemical Cycle Available to Purchase
Nobuyuki Gokon,
Nobuyuki Gokon
Niigata University, Niigata, Japan
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Tatsuya Kodama,
Tatsuya Kodama
Niigata University, Niigata, Japan
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Ayumi Nagasaki,
Ayumi Nagasaki
Niigata University, Niigata, Japan
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Ko-ichi Sakai,
Ko-ichi Sakai
Niigata University, Niigata, Japan
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Tsuyoshi Hatamachi
Tsuyoshi Hatamachi
Niigata University, Niigata, Japan
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Nobuyuki Gokon
Niigata University, Niigata, Japan
Tatsuya Kodama
Niigata University, Niigata, Japan
Ayumi Nagasaki
Niigata University, Niigata, Japan
Ko-ichi Sakai
Niigata University, Niigata, Japan
Tsuyoshi Hatamachi
Niigata University, Niigata, Japan
Paper No:
ES2009-90172, pp. 439-449; 11 pages
Published Online:
September 29, 2010
Citation
Gokon, N, Kodama, T, Nagasaki, A, Sakai, K, & Hatamachi, T. "Ferrite-Loaded Ceramic Foam Devices Prepared by Spin-Coating Method for a Solar Two-Step Thermochemical Cycle." Proceedings of the ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences. ASME 2009 3rd International Conference on Energy Sustainability, Volume 2. San Francisco, California, USA. July 19–23, 2009. pp. 439-449. ASME. https://doi.org/10.1115/ES2009-90172
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