TY - JOUR
T1 - Reduction of PAH and soot in premixed ethylene-air flames by addition of dimethyl ether
AU - Wu, Juntao
AU - Song, Ki Hoon
AU - Litzinger, Thomas
AU - Lee, Seong Young
AU - Santoro, Robert
AU - Linevsky, Milton
N1 - Funding Information:
Received 25 January 2005; accepted 3 June 2005. The authors wish to acknowledge the financial support of this work that was provided by the Strategic Environmental Research and Development Program (SERDP), project PP1179, under the direction of Dr. Charles Pellerin, and the assistance of Dr. Dan Haworth in carrying out the modeling portion of this work. *Address correspondence to [email protected]
PY - 2006/5
Y1 - 2006/5
N2 - Results are presented from a combined experimental and modeling study undertaken to understand the pathways by which the addition of dimethyl ether (DME) to fuel-rich ethylene flames causes reductions in PAH and soot. The experimental work was conducted in a flat-flame burner at equivalence ratios of 2.34 and 2.64. DME was added to the ethylene at two levels corresponding to 5 and 10% oxygen by weight in the fuel. Soot was measured by laser-induced incandescence calibrated with light extinction, and aromatic species were measured using laser-induced fluorescence. Modeling was based on a 1D, premixed flame model and kinetic mechanisms described in the literature. The modeling work captures the trends in aromatic species with changes in equivalence ratio and oxygen concentration in the fuel. However, the soot predictions do not match the increases observed at the higher equivalence ratio. Analysis of the modeling results for the lower equivalence ratio shows that the addition of DME to the ethylene reduces the aromatic species by increasing the concentration of oxidizing radicals, OH and O, and by reducing the amount of carbon that is available to form precursor species.
AB - Results are presented from a combined experimental and modeling study undertaken to understand the pathways by which the addition of dimethyl ether (DME) to fuel-rich ethylene flames causes reductions in PAH and soot. The experimental work was conducted in a flat-flame burner at equivalence ratios of 2.34 and 2.64. DME was added to the ethylene at two levels corresponding to 5 and 10% oxygen by weight in the fuel. Soot was measured by laser-induced incandescence calibrated with light extinction, and aromatic species were measured using laser-induced fluorescence. Modeling was based on a 1D, premixed flame model and kinetic mechanisms described in the literature. The modeling work captures the trends in aromatic species with changes in equivalence ratio and oxygen concentration in the fuel. However, the soot predictions do not match the increases observed at the higher equivalence ratio. Analysis of the modeling results for the lower equivalence ratio shows that the addition of DME to the ethylene reduces the aromatic species by increasing the concentration of oxidizing radicals, OH and O, and by reducing the amount of carbon that is available to form precursor species.
UR - http://www.scopus.com/inward/record.url?scp=33645759002&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33645759002&partnerID=8YFLogxK
U2 - 10.1080/00102200500269942
DO - 10.1080/00102200500269942
M3 - Article
AN - SCOPUS:33645759002
SN - 0010-2202
VL - 178
SP - 837
EP - 863
JO - Combustion science and technology
JF - Combustion science and technology
IS - 5
ER -