Thermal decomposition and kinetic evaluation of decanted 2,4,6-trinitrotoluene (TNT) for reutilization as composite material

14th International Symposium on Advanced Materials

Ahmed, M.F.^1 ; Hussain, A.^1 ; Malik, A.Q.^1

School of Chemical and Materials Engineering, National University of Sciences and Technology, Islamabad

44000, Pakistan^1

关键词: 2 ,4 ,6-trinitrotoluene;    Arrhenius kinetic parameters;    Crystalline nature;    Diffraction peaks;    Finding solutions;    Kinetic evaluations;    Rocket propulsion systems;    Thermogravimetric-differential thermal analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/146/1/012032/pdf
DOI  :  10.1088/1757-899X/146/1/012032

来源: IOP

【 摘 要 】

Use of energetic materials has long been considered for only military purposes. However, it is very recent that their practical applications in wide range of commercial fields such as mining, road building, under water blasting and rocket propulsion system have been considered. About 5mg of 2,4,6-trinitrotoluene (TNT) in serviceable (Svc) as well as unserviceable (Unsvc) form were used for their thermal decomposition and kinetic parameters investigation. Thermogravimetric/ differential thermal analysis (TG/DTA), X-ray diffraction (XRD) and Scanning electron microscope (SEM) were used to characterize two types of TNT. Arrhenius kinetic parameters like activation energy (E) and enthalpy (AH) of both TNT samples were determined using TG curves with the help of Horowitz and Metzger method. Simultaneously, thermal decomposition range was evaluated from DTA curves. Distinct diffraction peaks showing crystalline nature were obtained from XRD analysis. SEM results indicated that Unsvc TNT contained a variety of defects like cracks and porosity. Similarly, it is observed that thermal as well as kinetic behavior of both TNT samples vary to a great extent. Likewise, a prominent change in the activation energies (E) of both samples is observed. This in-depth study provides a way forward in finding solutions for the safe reutilization of decanted TNT.