Combustion mechanism of carbon monoxide-nitrous oxide flames

Journal Article · Tue Oct 01 04:00:00 EDT 1991 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(91)90023-5· OSTI ID:5630253

Dindi, H; Tsai, H M; Branch, M C ^[1]

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1. Center for Combustion Research, Dept. of Mechanical Engineering, Univ. of Colorado at Boulder, Boulder, CO (US)

This article presents measurements of the species concentration and temperature profiles in laminar, premixed, flat flames of carbon monoxide (CO) and nitrous oxide (N{sub 2}O) at low pressure. The composition measurements were carried out using gas chromatography. Laser-induced fluorescence spectroscopy was used to establish the absence of several key intermediates. Temperature was measured using R type thermocouple. The measurements show that the flame is most stable under fuel-rich conditions and that the oxygen atom is the only reactive intermediate. A detailed chemical kinetic model was completed to determine the kinetic mechanism of the flame. Agreement between experimental and calculated concentration profiles was excellent. A mechanism that initially consisted of 27 reactions was used and it was found that the flame structure could be accounted for by only 4 of the 27 elementary reactions. Since each measured species, except N{sup 2}O and N{sub 2}, was controlled by only one of the elementary reactions, it was possible to derive kinetic data for the four most important reactions in the mechanism. The effect of the experimental uncertainty of the temperature profile on the values of the rate constants derived was evaluated and was found to be small.

• OSTI ID: 5630253
• Journal Information: Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 87:1; ISSN 0010-2180; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHROMATOGRAPHY
COMBUSTION KINETICS
EMISSION SPECTROSCOPY
FLAMES
FLUORESCENCE SPECTROSCOPY
GAS CHROMATOGRAPHY
KINETICS
MEASURING INSTRUMENTS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
SEPARATION PROCESSES
SPECTROSCOPY
STABILITY
TEMPERATURE MEASUREMENT
THERMOCOUPLES