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Kinetics of dehydration of FeSO4.7H2O under different atmospheres

Abstract : Hydrated ferrous sulfate is a by-product of titanium and surface treatment industries. The majority of this product has to be disposed as a waste. Disposal is a significant extra cost for these industries. Recently, the ferrous sulfate partially dehydrated was successfully used for the synthesis of a new superoxidant material containing iron in hexavalent state (Fe-VI). The kinetics of dehydration of FeSO4. 7H2O under neutral, oxidizing and chlorinating atmospheres were studied by thermogravimetric and differential scanning calorimetry analysis. The obtained products were analyzed by X-ray diffraction and Mossbauer spectroscopy. The effects of temperature, gas velocity, type of sulfate, etc, on the dehydration rate were defined.
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Ndue Kanari, I. Gaballah, C. Mathieu, N. Neveux, O. Evrard. Kinetics of dehydration of FeSO4.7H2O under different atmospheres. 1999 TMS Annual Meeting, 1999, SAN DIEGO, CA, United States. pp. 17-28. ⟨hal-01510685⟩



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