Study of the catalytic activity of nano-coating CuC2O4 on tne thermodynamic parameters of thermal decomposition of ammonium perchlorate

To improve the process of thermal decomposition of ammonium perchlorate (for improving and modification propellant burning rate), the copper oxalate was coated by ammonium perchlorate through sol-gel method. Scanning electron microscopy (SEM) and thermal analysis(TG/DSC) were used for coating analysis of the copper oxalate on ammonium perchlorate and behavior changes of thermal decomposition of ammonium perchlorate in the presence of nano copper oxide made of nano copper oxalate respectively. The results of catalytic thermal decomposition of ammonium perchlorate shown that the cover of copper oxalate nanoparticles has a good effect on the thermal decomposition of ammonium perchlorate and the thermal decomposition temperature of ammonium perchlorate reduced from 422 ºC to 299 ºC. In addition, the thermal decomposition peaks of ammonium perchlorate (compared to thermal decomposition of pure ammonium perchlorate) were integrated. In order to evaluation of the effect of nano-catalyst on the thermodynamic and kinetic parameters one of the model-free methods as Ozawa - Flynn - Wall (OFW) equation was used. As result, it was observed that nano-catalyst reduced the activation energy, the frequency factor and thermodynamic parameters in different conversion rates 0.2, 0.4, 0.6 and 0.8, respectively.