Abstract
The processes of dehydration and thermal decomposition of aqueous solutions of manganese(II) nitrate, which depend on the composition of the initial test samples during their treatment in natural gas atmosphere, have been investigated using thermogravimetric analysis. The kinetics data have been analysed. It has been established that some impurities, such as calcium, magnesium and barium ions and crystal nuclei of manganese(IV) dioxide, influence the thermostability of manganese nitrate and the mechanism of its decomposition. The vital influence of water vapour on the kinetic mechanism and the rate of decomposition of manganese nitrate solutions containing alkaline earth nitrates has been demonstrated. The presence of a compensation effect in the alteration of the pre-exponential factor and the apparent activation energy has been recorded.
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