TY - GEN
T1 - Soot deposit properties in practical flames
AU - Preciado, Ignacio
AU - Eddings, Eric G.
AU - Sarofim, Adel F.
AU - Dinwiddie, Ralph B.
AU - Porter, Wallace D.
AU - Lance, Michael J.
PY - 2009
Y1 - 2009
N2 - A laboratory-scale device (water-cooled deposition probe) was designed for studying soot deposition in a laminar ethylene-air premixed flame. This experimental tool facilitates the evaluation of the deposition rates and deposit characteristics such as deposit thickness, bulk density, PAH content, deposit morphology and thermal properties, under both water-cooled and uncooled conditions. Additionally, a non-intrusive Laser Flash Technique was used to estimate experimental thermal conductivity values for soot deposits as a function of deposition temperature (water-cooled and uncooled experiments), location within the flame and chemical characteristics of the deposits. Important differences between water-cooled and uncooled surfaces were observed. Thermophoresis dominated the soot deposition process and enhanced higher deposition rates for the water-cooled experiments. Cooler surface temperatures resulted in the inclusion of increased amounts of condensable hydrocarbons in the soot deposit. The greater presence of condensable material promoted decreased deposit thicknesses, larger deposit densities, different deposit morphologies, and higher thermal conductivities.
AB - A laboratory-scale device (water-cooled deposition probe) was designed for studying soot deposition in a laminar ethylene-air premixed flame. This experimental tool facilitates the evaluation of the deposition rates and deposit characteristics such as deposit thickness, bulk density, PAH content, deposit morphology and thermal properties, under both water-cooled and uncooled conditions. Additionally, a non-intrusive Laser Flash Technique was used to estimate experimental thermal conductivity values for soot deposits as a function of deposition temperature (water-cooled and uncooled experiments), location within the flame and chemical characteristics of the deposits. Important differences between water-cooled and uncooled surfaces were observed. Thermophoresis dominated the soot deposition process and enhanced higher deposition rates for the water-cooled experiments. Cooler surface temperatures resulted in the inclusion of increased amounts of condensable hydrocarbons in the soot deposit. The greater presence of condensable material promoted decreased deposit thicknesses, larger deposit densities, different deposit morphologies, and higher thermal conductivities.
UR - http://www.scopus.com/inward/record.url?scp=78649518376&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:78649518376
SN - 9780841224414
T3 - ACS National Meeting Book of Abstracts
BT - American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
T2 - 237th National Meeting and Exposition of the American Chemical Society, ACS 2009
Y2 - 22 March 2009 through 26 March 2009
ER -