Thermal kinetic study of 1-amino-1,2,3-triazolium nitrate

Abstract

In this work, the thermal decomposition and kinetics of 1-amino-1,2,3-triazolium nitrate (ATZ-NO3) were investigated by non-isothermal thermogravimetric analyzer at various heating rates. A comparison of selected non-isothermal model-free methods for analyzing solid-state kinetics data was presented. The result showed that the thermal decomposition process of ATZ-NO3 consisted of two stages corresponding to the absence of amino-group, nitrate ion and the opening of triazole heterocycle, respectively. The experimental result showed that values of E obtained by three different methods were in good agreement, but kinetic parameters obtained by Kissinger method are constants during each decomposition stage and independent on conversion, while kinetic parameters from isoconversional methods have a close relationship with conversion. So comparing with Kissinger method, isoconversional methods, such as FWO and KAS methods, are more efficient in the description of decomposition mechanism. The Gibbs free energy of activation (ΔG ≠) for the decomposition reaction was calculated to compare the thermal stability of ATZ-NO3 with its homologues.