A computational study of sooting limits in laminar premixed flames of ethane, ethylene, and acetylene

Journal Article · Tue Jun 01 00:00:00 EDT 1993 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(93)90146-T· OSTI ID:6207437

Markatou, P; Wang, Hai; Frenklach, M ^[1]

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1. Pennsylvania State Univ., University Park (United States)

The onset of sooting in laminar premixed flames was examined computationally. Three series of atmospheric fuel-oxygen-nitrogen flames of ethane, ethylene, and acetylene were simulated using a detailed chemical kinetic model of soot particle nucleation and growth. It was found that the critical equivalence ratios for soot appearance, both the absolute values and temperature dependencies, can be predicted fairly close to the experimental observations, even when no reactions for the oxidation of aromatics by hydroxyl are included in the mechanism. The analysis of the computational results strongly suggests that the appearance of soot is controlled by two factors, concentration of acetylene and growth of polycyclic aromatics, and the latter is limited by the rise in flame temperature towards the end of the main reaction zone. The present results and conclusions are in agreement with the principal findings of previous modeling studies.

• OSTI ID: 6207437
• Journal Information: Combustion and Flame; (United States), Vol. 93:4; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
02 PETROLEUM
ACETYLENE
COMBUSTION KINETICS
ETHANE
ETHYLENE
SOOT
SYNTHESIS
CONCENTRATION RATIO
LAMINAR FLOW
LIMITING VALUES
MATHEMATICAL MODELS
NUCLEATION
POLYCYCLIC AROMATIC HYDROCARBONS
PRECURSOR
SIMULATION
TEMPERATURE DEPENDENCE
ALKANES
ALKENES
ALKYNES
AROMATICS
CHEMICAL REACTION KINETICS
FLUID FLOW
HYDROCARBONS
KINETICS
ORGANIC COMPOUNDS
REACTION KINETICS
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry
025000 - Petroleum- Combustion