Combustion of ammonium and hydrazine azides
- Mendeleev Inst. of Chemical Technology, 9 Miusskaya Square, 125190 Moscow (SU)
This paper reports that steady-state combustion of ammonium azide (AA) and hydrazne azide (HA) was studied in a window constant-pressure bomb over a pressure range of 0.1-36 MPa. HA burns three to four times faster than AA over the whole pressure range. The temperature distribution in the combustion wave of AA and HA was measured using 5-{mu}m-thick {pi}-shaped tungsten-rhenium tape thermocouples. The combustion temperature of both compounds is 240-430 K higher than the temperature calculated for the thermodynamically equilibrium composition of the combustion products due to the presence of large amounts of ammonia (0.97 and 0.87 mol per AA and HA mole, respectively). The burning surface is formed via dissociation of the salts into hydrazoic acid HN{sub 3} and the parent base. The growth of the surface temperature with pressure is determined by the dissociation enthalpy of the slats. The burning rate of these compounds is determined by heat release in the gas phase.
- OSTI ID:
- 7029967
- Journal Information:
- Combustion and Flame; (United States), Vol. 90:3; ISSN 0010-2180
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AMMONIUM COMPOUNDS
COMBUSTION
AZIDES
HYDRAZINE
COMBUSTION PRODUCTS
DECOMPOSITION
DISSOCIATION
EQUILIBRIUM
HIGH PRESSURE
HYDRAZOIC ACID
LIQUIDS
MEDIUM PRESSURE
SALTS
SHOCK WAVES
STEADY-STATE CONDITIONS
TEMPERATURE DISTRIBUTION
THERMOCOUPLES
CHEMICAL REACTIONS
FLUIDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MEASURING INSTRUMENTS
NITROGEN COMPOUNDS
OXIDATION
THERMOCHEMICAL PROCESSES
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry