The Interaction between Otto Fuel II and Aqueous Hydroxylammonium Perchlorate (HAP),Part III:Depletion of Components within the Reacting Liquids

摘要

Gas chromatography (GC) with a Flame Ionisation Detector (FID) has been used to determine changes in the concentrations of the components of Otto Fuel II (OF) in contact with an 82% aqueous solution of hydroxylammonium perchlorate (HAP) in sealed vials at 31.7 °C during the period leading up to auto-ignition of the two liquids.The concentration of hydroxylamine in HAP was monitored over the same period using a titration method.It was found that 2-nitrodiphenylamine (2NDPA),the stabiliser in the OF,is completely consumed after about 65-70 h and that the concentration of hydroxylamine begins to fall at this point.1,2-Propanediol dinitrate (propylene glycol dinitrate,PGDN),the energetic component in the OF,is not depleted significantly until after about 90 h.The evolution of nitrous oxide (N2O) between 65 and 90 h is attributed to the reaction of the hydroxylammonium ion with nitrous acids produced by PGDN decomposition at the liquid-liquid interface.Carbon dioxide (CO2) is evolved after ~90h and is attributed to PGDN decomposition.HAP and PGDN are each thought to contribute to N2O evolution after ~ 90 h.