High redox performance of Y0.5Ba0.5CoO3-: δ for thermochemical oxygen production and separation
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2020-04-01
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Journal Article
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Abstract
The efficient production and separation of oxygen is essential for numerous energy-intensive industrial applications in the fuel and mineral processing sectors. A thermochemical redox cycle is considered for separating oxygen from atmospheric air and other gas mixtures using solar or waste process heat. Based on electronic structure (DFT) computations Y0.5Ba0.5CoO3−δ is selected as a redox material, which surpasses the redox performance of state-of-the-art Cu2O. The thermochemical oxygen production is experimentally demonstrated by applying a temperature/pressure swing between 573 K at 0.2 bar O2 and 873 K at 1 bar O2. An energy balance shows the feasibility of using process waste heat from the solar thermochemical CO2/H2O splitting cycle and the potential to compete vis-a-vis with cryogenic distillation. Exploratory runs with a packed-bed reactor indicate the potential of both thermochemical oxygen production and separation for scale-up and industrial implementation.
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published
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5 (4)
Pages / Article No.
685 - 695
Publisher
Royal Society of Chemistry
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03530 - Steinfeld, Aldo (emeritus) / Steinfeld, Aldo (emeritus)
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320541 - Solar thermochemical production of fuels (EC)
823802 - Solar Facilities for the European Research Area - Third Phase (EC)
823802 - Solar Facilities for the European Research Area - Third Phase (EC)