TY - JOUR
T1 - The influence of carbon dioxide and oxygen as additives on soot formation in diffusion flames
AU - Du, D. X.
AU - Axelbaum, R. L.
AU - Law, Chung King
N1 - Funding Information:
The authors appreciate helpful discussions with Professor I. Glassman of Princeton University. This work was supported by the U.S. Air Force Office of Scientific Research under the technical monitoring of Dr. J. M. Tishkoff.
PY - 1991
Y1 - 1991
N2 - A study of carbon dioxide and oxygen addition on soot formation has been performed such that the effects of dilution, temperature and direct chemical participation have been isolated for the additives on both the fuel and oxidizer sides. By measuring soot inception limits in the counterflow flame and integrated soot volume fractions in the coflow flame, the influence of the additives on soot inception, growth and burnout has also been ascertained. Results demonstrate that carbon dioxide, whether added to the fuel or oxidizer side, can suppress soot formation chemically. The effect of oxygen addition is more complex. When added to the fuel side of an ethylene flame, the addition leads to an abrupt increase in the inception limit, indicating that the inception chemistry has been accelerated. The addition to propane, however, is initially suppressive and results in a significant reduction in the soot inception limit which is more than can be accounted for by dilution. The addition becomes promoting as the oxygen mole fraction approaches 40%. Finally, the effect of oxygen concentration on the oxidizer side, for both ethylene and propane flames, is almost totally thermal.
AB - A study of carbon dioxide and oxygen addition on soot formation has been performed such that the effects of dilution, temperature and direct chemical participation have been isolated for the additives on both the fuel and oxidizer sides. By measuring soot inception limits in the counterflow flame and integrated soot volume fractions in the coflow flame, the influence of the additives on soot inception, growth and burnout has also been ascertained. Results demonstrate that carbon dioxide, whether added to the fuel or oxidizer side, can suppress soot formation chemically. The effect of oxygen addition is more complex. When added to the fuel side of an ethylene flame, the addition leads to an abrupt increase in the inception limit, indicating that the inception chemistry has been accelerated. The addition to propane, however, is initially suppressive and results in a significant reduction in the soot inception limit which is more than can be accounted for by dilution. The addition becomes promoting as the oxygen mole fraction approaches 40%. Finally, the effect of oxygen concentration on the oxidizer side, for both ethylene and propane flames, is almost totally thermal.
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U2 - 10.1016/S0082-0784(06)80419-4
DO - 10.1016/S0082-0784(06)80419-4
M3 - Article
AN - SCOPUS:58149206039
SN - 0082-0784
VL - 23
SP - 1501
EP - 1507
JO - Symposium (International) on Combustion
JF - Symposium (International) on Combustion
IS - 1
ER -