A reduced kinetic mechanism for premixed CH[sub 3]Cl/CH[sub 4]/air flames
- Univ. of Illinois, Chicago (United States). Dept. of Mechanical Engineering
A reduced kinetic consisting of nine global steps is derived to describe freely propagating flames burning mixtures of methyl chloride and methane in air. The fuel blend contains two fuels with distinct (methyl chloride and methane) thermochemical properties, whose contribution to the radical pool in the flame is different. The objective is to (1) obtain predictions of flame speeds, particularly for rich flames, and (2) describe the gross chemistry by predicting the concentration profiles of the (a) fuels, (b) oxidizer, (c) products, in particular the C[sub 2]-containing species (since halogenated flames are generally sooting), and (d) the significant atomic/radical species in the flame. Chlorine atoms available from methyl chloride inhibit the flames, resulting in lower flame speeds. The mechanism is able to predict flame speeds for flames burning rich mixtures of equal molar amounts of methyl chloride and methane in air, and for stoichiometric flames burning methyl chloride and air in the range 30-67% methyl chloride in the methane/methyl chloride mixture. Theses predictions are in good agreement with simulations and measurements made in this laboratory, though large discrepancies exist in the measured flame speeds when data due to other investigators is included. The species concentration profiles obtained by using the reduced mechanism are in agreement with those predicted by the detailed mechanism from which it is derived.
- OSTI ID:
- 6256086
- Journal Information:
- Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 94:1-2; ISSN 0010-2180; ISSN CBFMAO
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
034000 -- Natural Gas-- Combustion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
AIR
ALKANES
CHEMICAL REACTION KINETICS
CHLORINATED ALIPHATIC HYDROCARBONS
COMBUSTION KINETICS
COMBUSTION PRODUCTS
CONCENTRATION RATIO
DATA
DISPERSIONS
EXPERIMENTAL DATA
FLAME PROPAGATION
FLOW RATE
FLUIDS
FUEL-AIR RATIO
GASES
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROCARBONS
INFORMATION
INHIBITION
KINETICS
MATHEMATICAL MODELS
METHANE
METHYL CHLORIDE
MIXTURES
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXIDIZERS
RADICALS
REACTION KINETICS
SOOT