Thermochemical hydrogen production via redox reactions with the input of concentrated solar thermal energy has been well recognized as an advanced green hydrogen generation technology. Creating a high enough temperature in the solar receiver relies on very high solar concentration ratio. Through the development of special heliostats and solar concentration technology, high heat flux of over 3000 suns could be achieved. Each specially designed heliostat creates a solar disc image of small area, and overlapping images make possible temperatures of up to 1500 oC in the solar receiver. In this work, special solar receiving chambers are configured to accommodate reduction reaction and oxidation reaction reciprocally to satisfy the demand of temperatures and gas environments for the different reactions. Analysis of the redox material temperature variation in transient processes of reaction is carried out to understand the dynamics of temperature control for thermochemical reactions.
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