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Issue 29, 2017
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Further insights into the kinetics of thermal decomposition during continuous cooling

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Abstract

Following the previous work (Phys. Chem. Chem. Phys., 2016, 18, 32021), this study continues to investigate the intriguing phenomenon of thermal decomposition during continuous cooling. The phenomenon can be detected and its kinetics can be measured by means of thermogravimetric analysis (TGA). The kinetics of the thermal decomposition of ammonium nitrate (NH4NO3), nickel oxalate (NiC2O4), and lithium sulfate monohydrate (Li2SO4·H2O) have been measured upon heating and cooling and analyzed by means of the isoconversional methodology. The results have confirmed the hypothesis that the respective kinetics should be similar for single-step processes (NH4NO3 decomposition) but different for multi-step ones (NiC2O4 decomposition and Li2SO4·H2O dehydration). It has been discovered that the differences in the kinetics can be either quantitative or qualitative. Physical insights into the nature of the differences have been proposed.

Graphical abstract: Further insights into the kinetics of thermal decomposition during continuous cooling

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Publication details

The article was received on 26 Jan 2017, accepted on 04 May 2017 and first published on 18 May 2017


Article type: Paper
DOI: 10.1039/C7CP00573C
Citation: Phys. Chem. Chem. Phys., 2017,19, 18836-18844
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    Further insights into the kinetics of thermal decomposition during continuous cooling

    T. Liavitskaya, N. Guigo, N. Sbirrazzuoli and S. Vyazovkin, Phys. Chem. Chem. Phys., 2017, 19, 18836
    DOI: 10.1039/C7CP00573C

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