NO[sub x] formation in unsteady combustion

Conference · Wed Jan 01 00:00:00 EST 1992

OSTI ID:7150288

Norton, T S; Richards, G A ^[1]; Narayanaswami, L L ^[2]

---

1. USDOE Morgantown Energy Technology Center, WV (United States)
2. Embry-Riddle Aeronautical Univ., Daytona Beach, FL (United States)

It has been found that fuel-lean operating conditions produce the best results for the current aerovalve pulse combustor. Under these conditions, the levels of unburned hydrocarbon pollutants in the exhaust stream are negligibly low. Initial results on CO indicate that the gas chromatograph method (thermal conductivity detector) is not sensitive enough to measure concentrations below 500 ppM. The modeling work involves the modification of an existing Thermal Pulse Combustor code to include some detailed chemistry. Two methods are used. In the first method, a kinetic mechanism for the formation of thermal NO is superimposed onto the oscillating field of temperature and pressure predicted by the existing pulse combustor model. The concentrations of oxygen atoms and N[sub 2], which control the NO formation step, are estimated from an equilibrium calculation at each temperature and pressure condition. Then the NO formation rate is determined from the rate of the reaction N[sub 2] + 0 --> NO + N. In the second method, more detailed chemistry is incorporated into the base model and the chemical heat release equations are used to drive the pulsations instead of vice versa. The 0-atom concentration is determined from a complex series of chain reactions, rather than by equilibrium.

• Research Organization: USDOE Morgantown Energy Technology Center, WV (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• OSTI ID: 7150288
• Report Number(s): DOE/METC/C-93/7049; CONF-921034-5; ON: DE93003481
• Resource Relation: Conference: US Department of Energy contractors review meeting on coal-fueled heat engines, advanced PFBC and gas stream cleanup systems, Morgantown, WV (United States), 27-28 Oct 1992
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
PULSE COMBUSTION
AIR POLLUTION CONTROL
CARBON MONOXIDE
FUEL-AIR RATIO
GAS CHROMATOGRAPHY
MATHEMATICAL MODELS
NITROGEN OXIDES
PRESSURE EFFECTS
PULSE COMBUSTORS
SYNTHESIS
CARBON COMPOUNDS
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMATOGRAPHY
COMBUSTION
COMBUSTORS
CONTROL
ENERGY SOURCES
FOSSIL FUELS
FUELS
MATERIALS
NITROGEN COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
014000* - Coal
Lignite
& Peat- Combustion