Effect of ammonia on the thermal decomposition of ammonium nitrate

Abstract

The effect of the partial pressure of gaseous ammonia on differential thermal analysis and thermogravimetric curves of ammonium nitrate has been determined. Observed variations of the thermal effect and decomposition rate constitute a basis for considering the factors which determine the decomposition and equilibrium of exo-and endothermic processes.

Thermal Autoignition of Aqueous Urea Ammonium Nitrate as a Function of Equivalence Ratio, Water Content, and Nitrogen Pressure

“…Therefore, fuel‐rich UAN mixtures will require more energy for their ignition to take place to compensate for the effect mentioned above. The change in trend observed at the highest equivalence ratio tested can be partially explained by the inhibiting effect of high amounts of urea on the thermal decomposition of AN . Higher equivalence ratios translate to higher urea and lower AN contents in fuel mixtures.…”

Thermal reactivity of some nitro- and nitroso-compounds derived from 1,3,5,7-tetraazabicyclo[3.3.1]nonane at contamination by ammonium nitrate

“…In solid state, ammonium nitrate is dissociated according to the following equilibrium [1,2,[20][21][22][23]:…”

“…The less distinct peak of acidolysisoxidation reaction of AN with HMX (Figs. 1 and 7)can be due to the prevailing decomposition of AN into nitrogen (I) oxide and water[1,2,[20][21][22][23] at temperatures above 216 • C; this is supported by the position of the curve of the prominent exothermic decomposition of AN, e.g. in Figs.…”

Measurement of reaction kinetics by a pressure rise method

“…3 CO(NH2) 2 " HNO~ --* 6 H20 + 3 N20 + CO2 + CN 9 NH 9 CONH2 (Cyanourea) (1) while others have reported [4] 4 CO(NH2)2 " HNO3 --* N20 + 2 CO2 + 2 CO(NH2) 2 + 3 NH4NO 3…”

“…Decomposition with ammonia accelerates the reaction and produces only urea and ammonium nitrate as reaction products [4]. Ammonium nitrate catalyzes the decomposition [5].…”