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  • Author or Editor: P. Masset x
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Abstract  

The dehydration of LiCl·H2O was studied under inert helium atmosphere by DTA/TG for different heating rates. The dehydration of LiCl·H2O proceeds through a two step reaction between 99–110 and 160–186°C, respectively. It leads to the formation of LiCl·0.5H2O as intermediate compound. The proposed mechanism is:

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Based on the temperature peak of the DTA signals the activation energies of the two reactions were determined to be 240 kJ mol−1 (step 1) and 137 kJ mol−1 (step 2), respectively.

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Abstract  

The thermal decomposition of FeSO46H2O 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 FeSO46H2O is: i) three dehydration steps FeSO46H2O FeSO44H2O+2H2O FeSO44H2O FeSO4H2O+3H2O FeSO4H2O 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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