Investigation of kinetic parameters for ammonium perchlorate thermal decomposition in presence of gCN/CuO by TG-MS analysis and kinetic compensation correction

The desire to develop a benign burn rate modifier for propellants has accentuated polymeric carbon nitride (gCN) as a potential candidate for the thermal decomposition of ammonium perchlorate (AP). Here, we have synthesized composites of leaf-shaped CuO and gCN via a facile sonochemical approach. From DSC analysis, the addition of gCNCuO1 reduced the decomposition temperature of AP by 59 degrees C and increased the heat release by similar to 1.4 times that of pure AP. The kinetics of AP decomposition was well investigated via in-situ TG-MS technique. From evolved gas analysis evolution of NO, Cl, HCl, N2O/CO2, NO2 and Cl-2 fragments were detected. The quantitative interpretation of kinetic parameters for AP decomposition was done using Coats-Redfern method and the normalization of E values were carried out by applying Kinetic Compensation Correction (KCC). After normalization, E values were decreased by 17 kJ/mol and 18 kJ/mol for the first and second stages respectively.

Automated summary

The study shows that gCN-CuO1 composite material can effectively reduce the decomposition temperature of AP and increase the heat release. Gas evolution during AP decomposition was successfully detected using in-situ TG-MS technique, and quantitative interpretation of kinetic parameters for AP decomposition was carried out using Coats-Redfern method and Kinetic Compensation Correction (KCC).