Processing of magnesium bearing materials by dry chlorination - An overview of kinetic aspects - Université de Lorraine Access content directly
Journal Articles Journal of Physics: Conference Series Year : 2017

Processing of magnesium bearing materials by dry chlorination - An overview of kinetic aspects

Ndue Kanari
  • Function : Correspondent author
  • PersonId : 1000077

Connectez-vous pour contacter l'auteur
F. Diot
  • Function : Author
E. Allain
  • Function : Author
J. Yvon
  • Function : Author

Abstract

This paper is focused on the reactivity of Cl 2 towards MgO in presence of a reducing (CO) and oxidizing (O 2) agent at temperatures up to 1025 °C. Kinetics parameters are determined by thermogravimetry under isothermal conditions. The overviewed results showed that the carbochlorination (Cl 2 +CO) occurred at temperatures lower than oxychlorination (Cl 2 +O 2). The reaction of MgO with Cl 2 +CO from 425 °C to 600 °C proceeds with an activation energy (E a) of about 49 kJ/mol, while the reaction rate does not longer depend on the temperature between 600 and 675 °C. The reaction of MgO with Cl 2 +O 2 at 850-1025 °C was characterized by a value of E a of 214 kJ/mol indicating that the overall rate of the process is controlled by the rate of chemical reaction. Oxychlorination can also be used for removing the impurities contained in the industrial magnesium raw materials. Further, the behavior of the MgO in chlorine atmosphere leads to give an insight about the reaction mechanisms useful for the selective chlorination of complex ores and concentrates containing magnesium oxide.
Fichier principal
Vignette du fichier
Kanari_2017_J._Phys.__Conf._Ser._879_012011.pdf (1.09 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive
Loading...

Dates and versions

hal-02169159 , version 1 (30-06-2019)

Licence

Attribution

Identifiers

Cite

Ndue Kanari, F. Diot, E. Allain, J. Yvon. Processing of magnesium bearing materials by dry chlorination - An overview of kinetic aspects. Journal of Physics: Conference Series, 2017, 879, pp.012011. ⟨10.1088/1742-6596/879/1/012011⟩. ⟨hal-02169159⟩
40 View
86 Download

Altmetric

Share

Gmail Facebook X LinkedIn More