The Effects of Fuel Additives on Soot Formation
Final rept. Feb 1986-Nov 1988
LOUISIANA STATE UNIV BATON ROUGE DEPT OF CHEMICAL ENGINEERING
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The effect of an iron additive on soot formation during the pyrolysis and oxidation of benzene was studied in a conventional, 7.6-cm i.d. shock tube. Iron pentacarbonyl, FeCO5, as a surrogate for ferrocene, was used as the additive. As a control, carbon monoxide CO was also considered an additive. Measurements were carried out at two pressure levels 2-3 atm. and 5-7 atm. over a temperature range from 1600-2400 K. No direct influence of iron could be demonstrated, although a weak effect would have been obscured by a surprisingly strong enhancement of sooting by CO during low-pressure pyrolysis and high- pressure oxidation. An indirect effect of iron was to reduce or eliminate the enhancement of soot yield by CO. Subject Terms Soot Formation, Benzene, Fuel, Pyrolysis, Oxidation, Shock Tube, Optical Probe, Additives, Iron.