Particle Formation in Laminar Flames Inhibited by Metals.
Particle Formation in Laminar Flames Inhibited by
Linteris, G. T.; Rumminger, M. D.
Spring Meeting. Western States Section/Combustion
Institute. March 25-27, 2002, LaJolla, CA, 1-30 pp,
laminar flames; metals; flame inhibition; fire
suppression; halon alternatives; nanoparticles; metal
oxides; organometallics; condensation; iron
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.