Abstract
The possible mechanisms by which large hydrocarbon ions might be produced in a fuel rich sooty flame are examined and all of them are eliminated except growth through ion-molecule reactions starting from the chemiion, HCO+. Large ions are not, as sometimes assumed, an indicator of neutral species. The ionic mechanism of soot nucleation is compared with a free radical mechanism by comparing the time each mechanism requires to add 10 carbon atoms to the growing species, ion or neutral. Experimental concentrations are combined with appropriate rate coefficients for the individual steps. The ionic mechanism appears to require less time, but the differences are within the accuracy of the data available.
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H.F. Calcote, D.B. Olson, D.G. Keil: Energy Fuels 2, 494 (1988)
H.F. Calcote, D.G. Keil: Pure Appl. Chem. 62, 815 (1990)
H.F. Calcote, D.G. Keil: Combust. Flame 74, 131 (1988)
P. Gerhardt, K.H. Homann: Combust. Flame 81, 289 (1990)
J.L. Delfau, P. Michaud, A. Barassin: Combust. Sei. Technol. 20 165 (1979)
D.B. Olson, H.F. Calcote: “Ions in fuel-rich and sooting acetylene and benzene flames” in Eighteenth Symposium (International) on Combustion ( The Combustion Institute, Pittsburgh 1981 ) p. 453
F.T. Smith: J. Chem. Phys. 34, 793 (1961)
H.F. Calcote: Combust. Flame 42, 215 (1981)
S.E. Stein, S.A. Kafafi: “Thermochemistry of Soot Formation”, in Proceeding on Fall Technical Meeting, Eastern Section (The Combustion Institute, NBS 1987 )
A.N. Eraslan, R.C. Brown: Combust. Flame 74, 191 (1988)
K.H. Homann: “Precursor Formation” in “Soot Formation in Combustion” -an International Round Table Diskussion, ed. by H. Jander, H.Gg. Wagner ( Vandenhoeck and Ruprecht, Göttingen 1990 ) p. 127
S.E. Stein: Combust. Flame 51 357 (1983)
P. Michaud, J.L. Delfau, A. Barassin: “The positive ion chemistry in the post-combustion zone of sooting premixed acetylene low pressure flat flames” in Eighteenth Symposium (International) on Combustion ( The Combustion Institute, Pittsburgh 1981 ) p. 443
H.F. Calcote, R.J. Gill: in preparation
H.F. Calcote: in Ion-Molecule Reactions, Vol. 2, ed. by J.L. Franklin ( Plenum Press, New York 1972 ) p. 673
H.F. Calcote, R.J. Gill: “Computer Modeling of Soot Formation Comparing Free Radical and Ionic Mechanisms” AeroChem TP-495 (April 1991)
M. Frenklach, J. Warnatz: Combust. Sei. Technol. 51, 265 (1987)
C. Vovelle, personal communication (December 1989)
J.D. Bittner, J.B. Howard: “Preparticle chemistry in soot formation” in Particulate Carbon: Formation During Combustion, ed. by D.G. Siegla, G.W. Smith (Plenum Press, New York 1981 ) p. 109
M. Frenklach, H. Wang: “Detailed modeling of soot particle nucleation and growth” in Twenty-Third Symposium (International) on Combustion ( The Combustion Institute, Pittsburgh 1991 ) p. 1559
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© 1994 Springer-Verlag Berlin Heidelberg
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Calcote, H.F., Gill, R.J. (1994). Comparison of the Ionic Mechanism of Soot Formation with a Free Radical Mechanism. In: Bockhorn, H. (eds) Soot Formation in Combustion. Springer Series in Chemical Physics, vol 59. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-85167-4_26
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DOI: https://doi.org/10.1007/978-3-642-85167-4_26
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