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Particle Formation in Laminar Flames Inhibited by Metals.

pdf icon Particle Formation in Laminar Flames Inhibited by Metals. (313 K)
Linteris, G. T.; Rumminger, M. D.

Spring Meeting. Western States Section/Combustion Institute. March 25-27, 2002, LaJolla, CA, 1-30 pp, 2002.


laminar flames; metals; flame inhibition; fire suppression; halon alternatives; nanoparticles; metal oxides; organometallics; condensation; iron pentacarbonyl


Some organometallic compounds of iron are two orders of magnitude more effective at volume fraction than CF3Br in premixed flames, an order of magnitude more effective in counterflow diffusion flames. The condensation of active gas-phase iron-containing intermediates to particles is believed to be the cause of the loss of effectiveness. The present paper reviews previous work on gas-phase inhibition by iron compounds as well as the role of particles in Fe(CO)5 inhibition of those flames. The understanding obtained from those simpler configurations is used to interpret new measurements of flame inhibition and particle formation in cup-burner flames of methane and air with iron, tin, manganese and bromine compounds added to the air stream.