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High redox performance of Y0.5Ba0.5CoO3−δ for thermochemical oxygen production and separation

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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.

Graphical abstract: High redox performance of Y0.5Ba0.5CoO3−δ for thermochemical oxygen production and separation

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Article information


Submitted
07 Nov 2019
Accepted
13 Dec 2019
First published
16 Dec 2019

This article is Open Access

React. Chem. Eng., 2020, Advance Article
Article type
Paper

High redox performance of Y0.5Ba0.5CoO3−δ for thermochemical oxygen production and separation

M. Ezbiri, A. Reinhart, B. Huber, K. M. Allen, A. Steinfeld, B. Bulfin and R. Michalsky, React. Chem. Eng., 2020, Advance Article , DOI: 10.1039/C9RE00430K

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