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Thermal Decomposition of Energetic Materials 56. On the fast thermolysis mechanism of ammonium nitrate and its mixtures with mangnesium and carbon

✍ Scribed by Dilip G. Patil; Sampat R. Jain; Thomas B. Brill

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
726 KB
Volume
17
Category
Article
ISSN
0721-3115

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✦ Synopsis

Abstract

Fast thermolysis studies of ammonium nitrate (AN) and its mixtures with magnesium and activated charcoal have been carried out by the Fourier transform infrared spectroscopy/temperature profiling technique. When subjected to rapid heating (ca. 80°C/s), AN Sublimes/decomposes around 300°. Sublimation dominates at ambient pressures. The IR‐active products of decomposition are NH~3~, NO~2~, N~2~O and H~2~O. Reaction schemes accounting for the products are proposed which involve proton transfer leading to NH~3~ by the decomposition products of HNO~3~. The decomposition of AN is significantly enhanced when AN is mixed with magnesium powder or charcoal, and occurs at as low a temperature as 135°C. Whereas NH~3~ is the major product of decomposition of ANMg mixtures, no NH~3~ is observed from ANC mixtures. The results are explained by the reaction of HNO~3~ and NH~3~ with Mg or C.

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