Mechanisms and reaction dynamics related to methane combustion: lean no-seeded flames. Final report, March 1985-June 1986

Technical Report · Thu Mar 20 04:00:00 EST 1986

OSTI ID:5034728

Zabielski, M F

Measurements were taken on lean (phi=0.92) CH/sub 4//O/sub 2//Ar flames seeded with NO in the concentrations from 800 ppm to 2.0%. The flames were run at 35 torr (4.7 kPa) to extend the reaction zones. With the extended reaction zone, the flames were probed with a molecular-beam sampling mass spectrometer. Concentration profiles of major species, radicals, and NO were determined. Temperature profiles were measured with Ir/Ir-Rh miniature thermocouples. In addition, N/sub 2/ was added to one flame; and, the removal of NO was determined from the ratio of the NO spectral intensity at mass 30 to the Ar spectral intensity at mass 40. The analysis of the mass spectral data indicated that the rate of NO removal is a first-order process. The data obtained with the seeded NO concentration varied from 1000 ppm to 2% indicated under these conditions that the NO removal was typically 15%. In the Ar/N/sub 2/ diluted flame, the onset of NO decay was observed. A discussion on the lean reburn method for NOx control is given.

• Research Organization: United Technologies Research Center, East Hartford, CT (USA)
• OSTI ID: 5034728
• Report Number(s): PB-86-222783/XAB
• Country of Publication: United States
• Language: English

Related Subjects

090110 -- Hydrocarbon Fuels-- Properties-- (1979-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
AIR POLLUTION
ALKANES
BEAMS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION PRODUCTS
FLAMES
HYDROCARBONS
IGNITION
KINETICS
MASS SPECTROSCOPY
MATHEMATICAL MODELS
METHANE
MOLECULAR BEAMS
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION
REACTION KINETICS
REMOVAL
SPECTROSCOPY
THERMOCHEMICAL PROCESSES