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TG/DTA/MS Study of the thermal decomposition of FeSO4·6H2O

Abstract : The thermal decomposition of FeSO4•6H2O was studied by mass spectroscopy coupled with DTA/TG thermal analysis under inert atmosphere. On the ground of TG measurements, the mechanism of decomposition of FeSO4•6H2O is:
i) three dehydration steps
FeSO4•6H2O FeSO4•4H2O+2H2O
FeSO4•4H2O FeSO4•H2O+3H2O
FeSO4•H2O FeSO4+H2O
ii) two decomposition steps
6FeSO4 Fe2(SO4)3+2Fe2O3+2SO2
Fe2(SO4)3 Fe2O3+3SO2+3/2O2
The intermediate compound was identified as Fe2(SO4)3 and the final product as the hematite Fe2O3.
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https://hal.archives-ouvertes.fr/hal-00386403
Contributor : Michel Levy <>
Submitted on : Thursday, May 21, 2009 - 9:01:19 AM
Last modification on : Thursday, November 19, 2020 - 1:50:07 PM

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Patrick Masset, Jean-Yves Poinso, Jean-Claude Poignet. TG/DTA/MS Study of the thermal decomposition of FeSO4·6H2O. Journal of Thermal Analysis and Calorimetry, Springer Verlag, 2006, 83 (2), pp. 457-462. ⟨10.1007/s10973-005-7267-6⟩. ⟨hal-00386403⟩

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