Thermal decomposition of han-based liquid propellants

摘要: Abstract Measurements were made by FTIR spectroscopy to identify the thermal decomposition products of HAN, solid TEAN, and XM46 at atmospheric pressure in a nitrogen environment. The major detected species HAN-water solutions H2O, N2O, NO, NO2, HNO3. process was characterized following events: 1) an induction period followed H2O evaporation, 2) rapid evolution HNO3, which supported fast occurrence proton transfer, 3) formation most likely from later stage decomposition. Solid HAN had same that identified aqueous HAN. However, times longer than those low initial set temperatures, perhaps because strong ion association. TEAN produced IR-active including CO2, CO, NO2. In XM46, sequential revealed. Evaporation dominated decomposition, producing stage, reactions became dominant form CO2 additional NO. Because interaction between rate related decreased compared with 9 M although concentration is nearly M. similar it conjectured detection governed mainly occurred early