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Titre :
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Development of reactive ceramics for conversion of concentrated solar heat into solar hydrogen with two-step water-splitting reaction (2011)
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Auteurs :
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H. Kaneko, Auteur ;
S. Taku, Auteur ;
Y. Naganuma, Auteur
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Type de document :
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Article : texte imprimé
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Dans :
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Transactions of the ASME. Journal of solar energy engineering (Vol. 132 N° 2, Mai 2010)
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Article en page(s) :
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pp. [021202/1-4]
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Note générale :
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Energie Solaire
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Langues :
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Anglais
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Index. décimale :
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621.47
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Tags :
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Reactive ceramics Concentrated solar heat Hydrogen production Two-step water-splitting process Ceria
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Résumé :
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The reactive ceramics suitable for the rotary-type solar reactor (proposed by Tokyo Institute of Technology, Tokyo) with two-step water-splitting reaction were developed. It is confirmed that O2 gas is evolved in the two-step water-splitting reaction with the reactive ceramics vigorously by rapid heating (-O2-releasing reaction). The -O2-releasing reaction is due to the formation of interstitial defect and the conversion of lattice oxygen into O2 gas at a nonequilibrium state. Reactive ceramics (NiFe2O4 and yttria stabilized zirconia (YSZ)-NiFe2O4 solid solution) can absorb solar thermal energy and convert thermal energy into chemical energy under high O2 partial pressure atmosphere in the -O2-releasing reaction. Repetitive evolutions of O2 gas were observed in the two-step water-splitting reaction with YSZ-Fe3O4 solid solution and cerium based metal oxides (CeO2–NiO, CeO2–ZrO2, and CeO2–Ta2O5) at high O2 partial pressure. The CeO2–Ta2O5 (Ce:Ta=90:10) released a large amount of O2 gas (3.95 cm3/g) in the -O2 releasing reaction in the flow of air.
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DEWEY :
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621.47
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ISSN :
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0199-6231
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En ligne :
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http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JSEEDO000132000002021202000001&idtype=cvips&gifs=Yes&ref=no
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