The effect of alkali metals on a laminar ethylene diffusion flame
- Univ. of Sydney, New South Wales (Australia)
The effect of sodium and potassium seeding on the sooting behavior of a laminar ethylene diffusion flame was investigated. Optical extinction and light scattering measurements were made to obtain soot volume fractions, number densities, particle diameters, and surface areas in seeded and unseeded flames. Sodium has no significant effects on the flame while potassium seeding leads to reductions in soot volume fractions of about 40% without affecting the particle number density. These results are in marked contrast with those found for alkali metal additions to premixed flames but it is not clear why this should be. The coupling of the temperature field with soot loadings in a diffusion flame limits the usefulness of perturbation techniques, such as seeding, as a means of investigating soot formation phenomena in diffusion flames.
- OSTI ID:
- 6449462
- Journal Information:
- Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 92:3; ISSN 0010-2180; ISSN CBFMAO
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
025000* -- Petroleum-- Combustion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKALI METALS
ALKENES
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
DENSITY
DIFFUSION
ELEMENTS
ETHYLENE
FLAMES
FLUID FLOW
HYDROCARBONS
INHIBITION
KINETICS
LAMINAR FLOW
LIGHT SCATTERING
METALS
ORGANIC COMPOUNDS
PARTICLE SIZE
PHYSICAL PROPERTIES
POTASSIUM
REACTION KINETICS
SCATTERING
SIZE
SODIUM
SOOT
SURFACE AREA
SURFACE PROPERTIES
SYNTHESIS
VOLUME