Laser fluorescence studies of the chemical interactions of sodium species with sulfur bearing fuels. Final report, Mar 1979 - Dec 1981

Technical Report · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6233766

Steinberg, M; Schofield, K

By using a large matrix of fuel rich and fuel lean H/sub 2//O/sub 2//N/sub 2/ and fuel rich C/sub 2/H/sub 2//O/sub 2//N/sub 2/ flames, the behavior of sodium and its interactions with sulfur at high temperatures was extensively characterized. OH concentrations were measured for each flame using the previously validated laser induced fluorescence technique. Sodium atomic concentrations were obtained by the saturated laser fluorescence method. Measurements were made in the absence and presence of up to 2% sulfur. In oxygen rich systems sodium is depleted by NaO/sub 2/ and NaOH formation. The relative amounts of each are controlled by the degree of nonequilibration of the flame radicals and by the temperature. The bond strength of NaO/sub 2/ was established. For the first time, a complete understanding of the complex behavior of sodium in fuel lean H/sub 2//O/sub 2/ flames has emerged and computer modeling has permitted various rate constants of Na, NaO/sub 2/ and NaOH reactions to be approximately fixed.

• Research Organization: California Univ., Santa Barbara (USA)
• OSTI ID: 6233766
• Report Number(s): N-8317625; NASA-CR-169861
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKALI METAL COMPOUNDS
ALKALI METALS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
ELECTROMAGNETIC RADIATION
ELEMENTS
FLAME PROPAGATION
FLUORESCENCE
FUELS
HYDROGEN
HYDROGEN COMPOUNDS
HYDROXIDES
KINETICS
LASER RADIATION
LUMINESCENCE
METALS
NITROGEN
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
RADIATIONS
REACTION KINETICS
SODIUM
SODIUM COMPOUNDS
SODIUM HYDROXIDES
SODIUM OXIDES
SULFUR
THERMODYNAMICS