Kinetic investigation on thermal decomposition of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) nanoparticles

Fathollahi, Manoochehr; Mohammadi, Behrouz; Mohammadi, Javad

doi:10.1016/j.fuel.2012.09.075

Cited by 68 publications

(50 citation statements)

References 23 publications

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“…T b is defined as the lowest temperature at which a specific charge may be heated without undergoing thermal runaway [37][38][39][40] T b may be calculated from inflammation theory and appropriate thermo-kinetic parameters, namely the activation energy, frequency factor and heat of reaction.…”

Section: Characteristic Temperatures Of Thermal Explosionmentioning

confidence: 99%

A comparative study of thermal behaviors and kinetics analysis of the pyrotechnic compositions containing Mg and Al

Fathollahi

Behnejad

2015

J Therm Anal Calorim

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The purpose of this research is to analyze the thermal behavior and kinetics of the pyrotechnic compositions including Al ? KClO 4 , Mg ? KClO 4 , Al ? Mg ? KClO 4 , MgAl ? KClO 4 and Al ? MgAl ? KClO 4 mixtures. The differential scanning calorimeter coupled with thermogravimetry analysis was employed to illustrate the reaction process of these pyrotechnic compositions. Moreover, the bomb calorimetry was utilized to compare experimental and theoretical heats of reaction. The apparent activation energy (E a ), frequency factor (A), the critical ignition temperature of thermal explosion and the self-accelerating decomposition temperature (T SADT ), were calculated using Kissinger approach. The results showed that the composition containing MgAl had the highest activation energy and frequency factor; however, the critical ignition temperature of their oxidation reaction was lowest value. In agreement with the theoretical value, the highest experimental heat of reaction for the composition MgAl/KClO 4 corresponds to the more complete combustion of metastable MgAl as an alloying mixture of Aluminum and Magnesium with equal proportions. These results suggest that benchmark values for an optimum designation and issues pertinent to the storage and handling of pyrotechnics containing Mg, Al and KClO 4 .

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Section: Characteristic Temperatures Of Thermal Explosionmentioning

confidence: 99%

A comparative study of thermal behaviors and kinetics analysis of the pyrotechnic compositions containing Mg and Al

Fathollahi

Behnejad

2015

J Therm Anal Calorim

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“…The performance of solid rocket propellant is strongly dependent on the characteristics of thermal decomposition of RDX [3,4]. Researchers have done much work on studying how to improve the combustion performance by adjusting the particle characteristics of energetic materials [5]. Actually, besides the energetic material itself, more and more researchers pay their attention to the additives that can be used to improve the thermal decomposition performance of RDX.…”

Section: Introductionmentioning

confidence: 99%

Electrospray formation of RDX/ceria mixture and its thermal decomposition performance

Han

Wang

et al. 2015

J Therm Anal Calorim

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Catalyst could significantly improve thermal decomposition performance of energetic materials. However, different approaches for dispersing catalyst into energetic materials lead to quite different results. Generally, improved homogeneity of the mixture always results in better performance. In this paper, a novel method was applied on synthesizing nanoceria; at the same time, electrospray method was introduced to produce homogenous RDX/ceria micropowder. The mixture was characterized and tested by scanning electron microscope-energy-dispersive spectroscopy and differential scanning calorimetry-thermogravimetry. Kissinger method was employed to calculate activation energy of different specimens according to DSC data. Results indicated that with electrospray formation, catalyst (nanoceria) could be evenly dispersed into RDX. In contrast to pure RDX, RDX/ceria mixture could decompose at a lower temperature and has lower activation energy. The calculation results of critical explosion temperature indicated that the mixture is safe for storage and process operation. This study points out a potential way to develop new method to make energetic/catalyst mixture.

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“…The critical temperature of thermal explosion (T b ) is an important parameter to evaluate the thermal stability of an energetic compound because it is essential to insure the safe storage and process operations involving explosives, propellants, and pyrotechnics. [20,21] The value of T b of 558.5 K can be calculated by the following Equation (8): [22] T b = (E 0 -ΊE 0 2 -4E 0 RT p0 ) / 2R (8) where E 0 is the apparent activation energy obtained by Ozawa's method, R is the gas constant, and T p0 is the peak temperature corresponding to βǞ0, 551.3 K. The distribution of electronic density is an important indicator to express the chemical and physical properties of a molecule, [23] and the contour line map of the electronic density on compound A was drawn in Figure 4 using the Multiwfn program. [24] It is reported that heavy nucleus always possess high peaks due to the nuclear charge improving electron aggregation and then displays integral exponential attenuation towards all surrounding atoms.…”

Section: Articlementioning

confidence: 99%

Crystal Structure and Properties of 7‐Imino‐3‐Nitroimino‐2,4,6,8‐Tetraazabicyclo[3.3.0]Octane Hydrochloride

Jin

2016

Zeitschrift anorg allge chemie

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Abstract. The chemical and physical properties of the energetic intermediate 7-imino-3-nitroimino-2, 4,6,8-tetraazabicyclo[3.3.0]-octane hydrochloride (compound A) were investigated. The crystal structure and thermal behavior were measured by X-ray diffraction and TG-DTG-DSC coupling system, respectively. The electronic structure was also studied by electronic density, nature bond orbital charges, frontier molecular orbital, density of state, and electrostatic potentials. Compound A crystallizes orthorhombic in space group Pna2 1 . Thermodynamic properties indicate that it has moderate thermal sta-

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Kinetic investigation on thermal decomposition of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) nanoparticles

Cited by 68 publications

References 23 publications

A comparative study of thermal behaviors and kinetics analysis of the pyrotechnic compositions containing Mg and Al

A comparative study of thermal behaviors and kinetics analysis of the pyrotechnic compositions containing Mg and Al

Electrospray formation of RDX/ceria mixture and its thermal decomposition performance

Crystal Structure and Properties of 7‐Imino‐3‐Nitroimino‐2,4,6,8‐Tetraazabicyclo[3.3.0]Octane Hydrochloride

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