A simplified reaction mechanism for soot formation in nonpremixed flames

Journal Article · Sun Dec 01 00:00:00 EST 1991 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(91)90114-Q· OSTI ID:5467175

Leung, K M; Lindstedt, R P ^[1]; Jones, W P ^[2]

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1. Fluids Section, Dept. of Mechanical Engineering, Imperial College, London SW7 2BX (GB)
2. Dept. of Chemical Engineering and Chemical Technology, Imperial College, London SW7 2BY (GB)

The present article outlines a simplified reaction mechanism for the formation, growth, and combustion of soot particles in laminar nonpremixed flames. The model can be combined with detailed chemistry descriptions for the gas phase, as in the present case, or with reduced chemical reaction mechanisms. The reaction mechanism involves nucleation, surface growth, particle coagulation, and combustion steps. The model outlined has been created with the intention of being applicable to the prediction of turbulent flames via different approaches. The soot nucleation and surface growth reactions are linked to the gas phase by presuming that pyrolysis products, in the present case acetylene, and not the fuel itself, are of primary importance in the soot formation process. The deduced reaction mechanism is applied to counterflow ethylene and propane flames burning with a range of oxygen-enriched and depleted air streams. The results obtained show excellent qualitative and quantitative agreement with measured data for soot volume fraction, particle growth, and number density.

• OSTI ID: 5467175
• Journal Information: Combustion and Flame; (United States), Vol. 87:3; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
FLAMES
SOOT
COMBUSTION
ACETYLENE
CHEMICAL REACTIONS
DENSITY
ETHYLENE
FLOCCULATION
FUELS
FUNCTIONAL MODELS
GROWTH
LAMINAR FLOW
NUCLEATION
PROPANE
PYROLYSIS
SURFACE AREA
SYNTHESIS
TURBULENCE
VOLUME
ALKANES
ALKENES
ALKYNES
DECOMPOSITION
FLUID FLOW
HYDROCARBONS
ORGANIC COMPOUNDS
OXIDATION
PHYSICAL PROPERTIES
PRECIPITATION
SEPARATION PROCESSES
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry