Abstract
The kinetics and the mechanism of the thermal decomposition of NH 4HSO 4 were studied by means of thermogravimetry at constant temperature and with increasing temperature. The mechanism function of the reaction was found and identified by a three-stage identification method. Some kinetic parameters were determined. The results of the two methods showed that the thermal decomposition of NH 4HSO 4 is dominated by an R 1 mechanism, i.e. a one-dimensional phase-boundary reaction. The activation energy E obtained by thermogravimetry at constant temperature is 141.25 kJ mol −1. The frequency factor A is 1.563 × 10 10 min −1. Its kinetic compensation effect is log A = 0.0899 E−2.5143.
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