Abstract
The reduction of different metal sulphates by hydrogen occurs at different temperatures and can lead to a variety of products. It has been shown that the starting temperatures for the reduction of several sulphates are directly related to the magnitude of their (exothermic) heats of formation per equivalent. The thermochemical data also provide a basis for the interpretation of the relative thermal stabilities (under nitrogen atmosphere) of several metal sulphates. A consideration of the appropriate heat of formation values can also be useful in understanding the different reduction products obtained for different metal sulphates. Finally, the reduction behaviour of some binary metal sulphates is also consistent with the thermochemical data.
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Vijh, A.K. A thermochemical approach to the gas-phase reduction of metal sulphates. J Mater Sci 13, 2413–2417 (1978). https://doi.org/10.1007/BF00808056
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DOI: https://doi.org/10.1007/BF00808056