The solar 2-step Zn/ZnO redox cycle for splitting H2O and CO2 has the potential of reaching high solar-to-fuel energy conversion efficiencies and, consequently, economic competitiveness. It consists of: (1) the endothermic dissociation of ZnO to Zn and O2 using concentrated solar energy; and (2) the subsequent exothermic reaction of Zn with H2O/CO2 to H2/CO (mixture known as syngas) and the initial ZnO; the latter is recycled to the first step. Following the technical demonstration of the first step with a 10-kW solar reactor prototype, a 100 kW solar pilot plant has been designed, fabricated, and experimentally tested. Solar experimentation was carried out at the 1-MW Solar Furnace (MWSF) in Odeillo, France. A description of the pilot plant layout, including the solar reactor technology, operational experience and results from work in progress are presented.

Experimental demonstration of a 100 kW solar pilot plant for the thermal dissociation of zinc oxide

245th National Meeting (2013)

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