Method for producing hydrogen by means of thermochemical water-splitting, and device for producing hydrogen
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United States of America Patent
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Sep 24, 2013
Grant Date -
Sep 20, 2012
app pub date -
Dec 1, 2010
filing date -
Dec 3, 2009
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Abstract
The disclosed method for producing hydrogen by means of thermochemical water-splitting can efficiently use solar energy obtained by means of a beam-down typed light collecting system. Further disclosed is a device for producing hydrogen. While circulating within a reactor (1) a fluidized bed (2) made of metal oxide particles, two reactions are simultaneously caused to proceed: a thermal reduction reaction, which is an oxygen evolution reaction wherein a portion of the fluidized bed (2) is heated by solar light (S) in a nitrogen atmosphere, which is a low oxygen partial pressure gas, releasing oxygen from the metal oxide; and a thermochemical water-splitting reaction, which is a hydrogen evolution reaction wherein water vapor is brought into contact with the metal oxide after oxygen has been released, generating hydrogen.
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