TY - GEN
T1 - Soot fragmentation in laminar premixed ethylene-air flames
AU - Romano, V.
AU - Sarofim, A. F.
AU - Lighty, J. S.
PY - 2007
Y1 - 2007
N2 - The rate of oxidation of soot by O2 is a function of the physical characteristics of soot. The exact parameters of importance are not fully understood. The intrinsic rate of carbons is known to be a function of the graphitization of the carbon in soot and the extent of oxygen intercalation into graphitic domains. In addition, the rate of oxidation is enhanced by reactions within pores. Evidence for internal oxidation is provided by fragmentation of soot when oxidized under fuel-lean conditions, in contrast to absence of fragmentation when oxidized under fuel-rich conditions. More data are needed to understand and model these processes. The present study involves the use of a two-stage burner to generate and oxidize soot; samples taken from both flames are analyzed with Nano-Mobility Particle Size analysis and High Resolution Transmission Electron Microscopy. The study will focus on experimental conditions where significant soot fragmentation occurs. Preliminary calculations on the relative rate of reaction of OH and O2 with a planar soot surface suggest that oxidation by O2 dominates at temperatures below 1600K and at fuel equivalence ratios above 0.5, defining the conditions for our experimental studies of soot oxidation by O2 and any associated fragmentation.
AB - The rate of oxidation of soot by O2 is a function of the physical characteristics of soot. The exact parameters of importance are not fully understood. The intrinsic rate of carbons is known to be a function of the graphitization of the carbon in soot and the extent of oxygen intercalation into graphitic domains. In addition, the rate of oxidation is enhanced by reactions within pores. Evidence for internal oxidation is provided by fragmentation of soot when oxidized under fuel-lean conditions, in contrast to absence of fragmentation when oxidized under fuel-rich conditions. More data are needed to understand and model these processes. The present study involves the use of a two-stage burner to generate and oxidize soot; samples taken from both flames are analyzed with Nano-Mobility Particle Size analysis and High Resolution Transmission Electron Microscopy. The study will focus on experimental conditions where significant soot fragmentation occurs. Preliminary calculations on the relative rate of reaction of OH and O2 with a planar soot surface suggest that oxidation by O2 dominates at temperatures below 1600K and at fuel equivalence ratios above 0.5, defining the conditions for our experimental studies of soot oxidation by O2 and any associated fragmentation.
UR - http://www.scopus.com/inward/record.url?scp=84946015513&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84946015513
T3 - Western States Section/Combustion Institute Fall Meeting 2007
SP - 452
EP - 462
BT - Western States Section/Combustion Institute Fall Meeting 2007
T2 - Western States Section/Combustion Institute Fall Meeting 2007
Y2 - 16 October 2007 through 17 October 2007
ER -