Solar Thermal Splitting of Zinc Oxide: A Review of Some of the Rate Controlling Factors
Author:
Le´de´ Jacques1, Elorza-Ricart Enrique1, Ferrer Monique1
Affiliation:
1. Laboratoire des Sciences du Ge´nie Chimique, CNRS-ENSIC, 1 rue Grandville–BP 451, F-54001 NANCY Cedex, France
Abstract
It is possible to use concentrated solar energy for producing zinc by direct high temperature dissociation of ZnO. The purpose of the present paper is to show that the overall efficiency of such a process as well as the quality of the products may be controlled by several chemical and physical factors such as heat and mass transfer efficiencies, hydrodynamics and reactor design. The results of three complementary experimental approaches are reported. They are interpreted in connection with simplified models in order to describe the controlling processes occurring in the high temperature and quench sections of the reactor. One of the conclusions is that zinc can be recovered by condensation on the cold walls of a heat exchanger and/or under the form of small dispersed particles. Finally, it is shown that the reactor design must be optimized inside the perspective of a given future use of zinc.
Publisher
ASME International
Subject
Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment
Reference19 articles.
1. Le´de´, J., and Ferrer, M., 1999, “Solar Chemical Reactors,” J. Phys. IV, 9, Pr3, pp. 253–258. 2. Palumbo, R., Le´de´, J., Boutin, O., Elorza-Ricart, E., Steinfeld, A., Mo¨ller, S., Weindenkaff, A., Fletcher, E. A., and Bielicki, J., 1998, “The Production of Zn from ZnO in a High-Temperature Solar Decomposition Quench Process,” Chem. Eng. Sci., 53, 14, pp. 2503–2519. 3. Elorza-Ricart, E., Martin, P. Y., Ferrer, M., and Le´de´, J., 1999, “Direct Thermal Splitting of ZnO Followed by a Quench. Experimental Measurement of Mass Balances,” J. Phys. IV, 9, Pr3, pp. 325–330. 4. Elorza-Ricart, E., Ferrer, M., and Le´de´, J., 2000, “Dissociation thermique directe de l’oxyde de zinc para voie solaire,” Entropie, 36, No. 228, pp. 55–59. 5. Elorza-Ricart, E., 1998, “Dissociation thermique solaire, suivie de trempe, de l’oxyde de zinc,” Diplome d’Etudes Approfondies, ENSIC-INPL-LSGC, Nancy, France.
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27 articles.
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