Generation of CO and smoke during underventilated combustion

Journal Article · Fri Jul 01 00:00:00 EDT 1994 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(94)90195-3· OSTI ID:7102590

Leonard, S; Mulholland, G W; Puri, R; Santoro, R J ^[1]

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1. Pennsylvania State Univ., University Park, PA (United States). Dept. of Mechanical Engineering

The CO and smoke yields observed for underventilated laminar diffusion flames are presented for methane and ethene for global equivalence ratio (Phi) over the range 0.5 to 4.0. A Burke-Schumann type burner with fuel in the center tube and air in the annular region was used. The peak CO yields for methane and ethene, 0.37 and 0.47, respectively, are at least a factor of 100 greater than for overventilated burning. The ratio of CO/CO[sub 2] versus [Phi] for the methane flame is compared with local measurements of this ratio for both overventilated and underventilated laminar diffusion flames and with the results for turbulent natural gas flames quenched in an upper layer. The peak smoke yields for methane at a flow rate of 10 cm[sup 3]/s and for ethene at a fuel flow rate of 6.4 cm[sup 3]/s are 0.01 and 0.05, respectively, compared with yields of 0.0 and 0.028 for the overventilated case. The proportionally between smoke yield observed for overventilated burning for a wide range of fuels is found not to be valid for the underventilated case. The chemical makeup and structure of the smoke produced at high equivalence ratio is qualitatively different from smoke produced under overventilated conditions; the smoke is mainly organic rather than graphitic and it has an agglutinated structure rather than an agglomerate structure with distinct primary spheres usually observed in overventilated burning.

• OSTI ID: 7102590
• Journal Information: Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 98:1-2; ISSN CBFMAO; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
025000 -- Petroleum-- Combustion
03 NATURAL GAS
034000* -- Natural Gas-- Combustion
AEROSOLS
ALKANES
ALKENES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
COLLOIDS
COMBUSTION KINETICS
DISPERSIONS
ETHYLENE
FUEL-AIR RATIO
HYDROCARBONS
KINETICS
METHANE
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
RESIDUES
SMOKES
SOLS
YIELDS