Some kinetics aspects of chlorine-solids reactions

Kanari, N and Mishra, D and Mochon, J and Verdeja, L F and Diot, F and Allain, E (2010) Some kinetics aspects of chlorine-solids reactions. REVISTA DE METALURGIA, 46 (1). pp. 22-36.

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The present paper describes detailed kinetics investigations on some selected chlorine-solid reactions through thermogravimetric measurements. The solids studied in this article include chemical pure oxides and sulfides as well as their natural bearing materials. The chlorinating agents employed are gaseous mixtures of Cl-2+N-2 (chlorination), Cl-2+O-2 (oxychlorination), and Cl-2+CO (carbochlorination). Results are presented as effects of various parameters on the reaction rate of these solids with these chlorinating agents. It was observed that the reactivity of these solids towards different chlorinating agents varied widely. Sulfides could be chlorinated at room temperature, while carbochlorination of chromium (III) oxide was possible only above 500 degrees C. The variation of the chlorination rate of these complex materials with respect to gas velocity, composition and temperature enabled us to focus some light on the plausible reaction mechanisms and stoichiometries. The obtained results were used for selective removal of iron from chromite concentrates, extraction of valuable metals from sulfide materials, purification of MgO samples, etc.

Item Type:Article
Official URL/DOI:DOI: 10.3989/revmetalm.0852
Uncontrolled Keywords:Thermogravimetric analysis; Complex oxides; Sulfides; Chlorination; Oxychlorination; Carbochlorination; Kinetics
Divisions:Material Science and Technology
ID Code:3264
Deposited On:13 Jul 2011 12:01
Last Modified:03 Jan 2012 11:46
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