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International Journal of Energy for a Clean Environment
SJR: 0.195 SNIP: 0.659 CiteScore™: 1.2

ISSN Print: 2150-3621
ISSN Online: 2150-363X

International Journal of Energy for a Clean Environment

Formerly Known as Clean Air: International Journal on Energy for a Clean Environment

DOI: 10.1615/InterJEnerCleanEnv.v5.i3.10
18 pages

A KINETIC MODEL OF PARTICULATE CARBON FORMATION IN RICH PREMIXED FLAMES OF ETHYLENE AND BENZENE

A. Violi
Department of Chemicals and Fuels Engineering, University of Utah, Salt Lake City, Utah, USA
A. D'Anna
Departimento di Ingegneria Chimica — Universita di Napoli "Federico II" Piazza V. Tecchio, 80-80125 Napoli, ITALY
A. D'Alessio
Departimento di Ingegneria Chimica — Universita di Napoli "Federico II" Piazza V. Tecchio, 80-80125 Napoli, ITALY

ABSTRACT

A detailed chemical kinetic mechanism, which emphasizes the role of resonantly stabilized radicals in the growth of aromatic species, has been used to study the effect of fuel type on the formation of total particulate carbon in rich premixed flames. The model has been able to predict the concentration and formation rate of total organic carbon collected in sooting rich flames of ethylene and benzene. Model results have shown that the combination of resonantly stabilized radicals is the controlling step in the formation of aromatics in flames; in particular, cyclopentadienyl radical self-combination is the dominant route of multi-ring aromatic formation. The larger amount of cyclopentadienyl radicals in benzene fuel oxidation may explain the larger yield of particulate carbon formed in aromatic fuel flames than aliphatic ones in the same conditions of pressures, temperatures, and flux of carbon in surplus with respect to the stoichiometric one.


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