Modeling gas-phase nitrogen chemistry in one-dimensional, pulverized-coal flames

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6444447

Peck, R E; Glarborg, P

This paper explains a detailed reaction mechanism for converting fuel nitrogen to nitric oxide and molecular nitrogen in gas flames used to model nitrogen chemistry in fuel-rich coal-dust/oxidizer flat flames. Initially, coal nitrogen devolatilizes quantitatively to HCN and neglect hydrocarbon reactions by using measured temperature and major stable species concentrations together with partial equilibrium values for H, O, and OH to specify local gas properties. The predicted distributions of nitrogenous species (HCN, NH/sub 3/, NO and N/sub 2/) are compared to time-resolved experimental data obtained for two stoichiometries and coal types. Preliminary calculations support the applicability of the model for bituminous coal flames where HCN and NO are important intermediate species and N/sub 2/ is the primary end product. However, contrary to experimental observations the model predicts a fast consumption of NO at longer residence times.

• Research Organization: Arizona State Univ., Tempe, AZ
• OSTI ID: 6444447
• Report Number(s): CONF-8610180-
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010900 -- Coal
Lignite
& Peat-- Environmental Aspects
014000* -- Coal
Lignite
& Peat-- Combustion
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION MONITORING
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
COAL
COAL FINES
COMBUSTION KINETICS
COMBUSTION PRODUCTS
DEVOLATILIZATION
ELEMENTS
EMISSION
ENERGY SOURCES
FLAMES
FOSSIL FUELS
FUEL-AIR RATIO
FUELS
GASEOUS WASTES
HYDROCARBONS
KINETICS
MATERIALS
MATHEMATICAL MODELS
NITROGEN
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
ONE-DIMENSIONAL CALCULATIONS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
STABILITY
STOICHIOMETRY
TEMPERATURE EFFECTS
WASTES