Add time:08/08/2019 Source:sciencedirect.com
A derivatograph study has been carried out for the thermal decomposition of ferrous sulphate monohydrate in an oxidizing gaseous atmosphere. Based on the results from the derivatographic, thermogravimetric, and X-ray phase analyses, and from Mössbauer spectroscopy, a two-stage process for oxidizing Fe2+ to Fe3+ is suggested with formation of intermediate products, such as FeOHSO4 and Fe2O(SO4)2. A new mechanism is suggested for the thermal decomposition of FeSO4·H2O in an oxidizing gaseous atmosphere, that takes into account the effect of the partial pressure of the gaseous components on the rate of certain parallel reactions.
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