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Direct chlorination roasting is a worldwide applied industrial process for extracting metals from oxides and oxide mixtures, whereas specific oxides react with chlorine resulting in volatile chlorinated molecules, which can then be separated and further reduced to metallic products. In this context, the presence of a reducing agent, graphite for example, has proven to stimulate not only the thermodynamics...
This work is mainly related to the thermodynamic study of the V 2 O 5 carbon-chlorination. In this context, three different approaches of diverse complexity level were employed. First, the formation of individual vanadium chlorides and oxychlorides were considered on the basis of the well known ΔG°×T diagrams. It is suggested that these simple constructions can help in understanding...
The heat capacity of stoichiometric Al 2 MnO 4 spinel was measured from 2 to 873 K. These data are used to evaluate the entropy of this compound at 298.15 K and to propose a Gibbs energy function which was extrapolated to higher temperatures. Previously measured and assessed values for this compound are compared and the possible impact on the pseudo-binary Al 2 O 3 ...
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