Computational aspects of kinetic analysis: Part A: The ICTAC kinetics project-data, methods and results

Computational aspects of kinetic analysis. Part C. The ICTAC Kinetics Project — the light at the end of the tunnel?

Thermal decomposition of ammonium perchlorate

Catalytic effects of nano additives on decomposition and combustion of RDX-, HMX-, and AP-based energetic compositions

The methods of thermogravimetric analysis (TGA) and differential scanning calorimettry (DSC) have been used to study the thermal decomposition of ammonium perchlorate (AP). TGA curves obtained under both isothermal and nonisothermal conditions show a characteristic slowdown at the extents of conversion, α = 0.30−0.35. DSC demonstrates that in this region the process changes from an exothermic to an endothermic regime. The latter is ascribed to dissociative sublimation of AP. A new computational technique (advanced isoconversional method) has been used to determine the dependence of the effective activation energy (Eα) on α for isothermal and nonisothermal TGA data. At α > 0.1, the Eα dependencies obtained from isothermal and nonisothermal data are similar. By the completion of decomposition (α → 1) the activation energy for the isothermal and nonisothermal decomposition respectively rises to ∼110 and ∼130 kJ mol-1, which are assigned to the activation energy of sublimation. The initial decomposition (α → ...

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Patrick William McCarthy Jacobs

Papers

Decomposition and combustion of ammonium perchlorate