Detailed chemistry and thermodynamics of sodium in oxygen-rich flames
Technical Report
·
OSTI ID:6233757
Measurement of sodium and OH concentrations in ten oxygen-rich H/sub 2//O/sub 2//N/sub 2/ flames by saturated and low-power laser induced fluorescence techniques respectively have permitted a detailed examination of the pronounced flame chemistry of sodium in such oxygen rich media. Previous interpretations have been shown to be largely incomplete or in error. The flame downstream profiles indicate that the amount of free sodium tracks the decay of H-atom and as the flame radicals decay sodium becomes increasingly bound in a molecular form. A detailed kinetic model indicates that the sodium is distributed between NaOH and NaO/sub 2/ species. Concentrations of NaO are very small and NaH negligible. The actual distribution is controlled by the state of equilibrium of the flames' basic free radicals. Na, NaO/sub 2/ and NaOH are all coupled to one another by fast reactions which can rapidly interconvert one to another as flame conditions vary. Above about 2000K, NaOH becomes dominant whereas NaO/sub 2/ plays an increasingly important contribution at lower temperatures.
- Research Organization:
- California Univ., Santa Barbara (USA)
- OSTI ID:
- 6233757
- Report Number(s):
- N-8317626; CONF-821035-12
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ABSORPTION
ALKALI METAL COMPOUNDS
ALKALI METALS
ATMOSPHERIC PRESSURE
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ELEMENTS
FLAMES
FLUORESCENCE
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
HYDROXIDES
KINETICS
LASER RADIATION
LUMINESCENCE
METALS
NITROGEN
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADIATIONS
REACTION KINETICS
SODIUM
SODIUM COMPOUNDS
SODIUM HYDRIDES
SODIUM HYDROXIDES
SODIUM OXIDES
THERMODYNAMICS
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ABSORPTION
ALKALI METAL COMPOUNDS
ALKALI METALS
ATMOSPHERIC PRESSURE
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ELEMENTS
FLAMES
FLUORESCENCE
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
HYDROXIDES
KINETICS
LASER RADIATION
LUMINESCENCE
METALS
NITROGEN
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADIATIONS
REACTION KINETICS
SODIUM
SODIUM COMPOUNDS
SODIUM HYDRIDES
SODIUM HYDROXIDES
SODIUM OXIDES
THERMODYNAMICS