The production of Zn from ZnO in a high-temperature solar decomposition quench process—I. The scientific framework for the process

We present a theoretical and experimental study of a solar decomposition process for producing Zn and O 2 from ZnO(s). The decomposition step occurs at temperatures near 2000 K, and the gaseous products are quenched. A numerical model that uses the latest kinetic data for the decomposition and reoxi...

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Bibliographic Details
Published in:Chemical engineering science 1998-07, Vol.53 (14), p.2503-2517
Main Authors: Palumbo, R., Léde, J., Boutin, O., Elorza Ricart, E., Steinfeld, A., Möller, S., Weidenkaff, A., Fletcher, E.A., Bielicki, J.
Format: Article
Language:English
Subjects:
Applied sciences
decomposition
Exact sciences and technology
Metals. Metallurgy
Production of alloys
Production of metals
Production of non ferrous metals. Process materials
quench
solar chemistry
Solar energy
solar fuel
zinc
zinc oxide
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Summary:We present a theoretical and experimental study of a solar decomposition process for producing Zn and O 2 from ZnO(s). The decomposition step occurs at temperatures near 2000 K, and the gaseous products are quenched. A numerical model that uses the latest kinetic data for the decomposition and reoxidation reactions suggests that Zn conversions as high as 80% can be obtained with solar flux densities of 2 MW m -2. The decomposition and quench were effected in a solar furnace and in a solar furnace simulator. Zn yields were as high as 90% depending in part on the dilution ratio and quenching surface’s temperature.
ISSN:0009-2509
1873-4405
DOI:10.1016/S0009-2509(98)00063-3