Partial equilibrium in the reaction zone of methane-air diffusion flames

Journal Article · Fri Feb 01 04:00:00 EST 1980 · Combust. Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(80)90087-5· OSTI ID:5124242

Mitchell, R E; Sarofim, A F; Clomburg, L A

Massachusetts Institute of Technology's analysis of the temperature and composition profiles obtained by probing a confined, axisymmetric, laminar methane-air diffusion flame suggests that a state of partial equilibrium exists in the high-temperature primary reaction zone. In this state, the bimolecular reactions associated with the CO-H/sub 2/-O/sub 2/ system are equilibrated and the three-body recombination reactions are not. The free-radical concentrations produced are several orders of magnitude in excess of full equilibrium. These superequilibrium radical concentrations play a significant role in influencing the formation rates of nitric oxide via the extended Zeldovich mechanism.

• OSTI ID: 5124242
• Journal Information: Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 37; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
034000* -- Natural Gas-- Combustion
090110 -- Hydrocarbon Fuels-- Properties-- (1979-1989)
10 SYNTHETIC FUELS
AIR
ALKANES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION KINETICS
ELEMENTS
FLAMES
FLUIDS
GASES
HYDROCARBONS
HYDROGEN
KINETICS
METHANE
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
REACTION INTERMEDIATES
REACTION KINETICS
SYNTHESIS
THERMOCHEMICAL PROCESSES