Influence of bed-region stoichiometry on nitric oxide formation in fixed-bed coal combustion

Journal Article · Fri Feb 01 04:00:00 EST 1985 · Combust. Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(85)90025-2· OSTI ID:5693745

Starley, G P

A thick-bed reactor with refractory walls was used to investigate the influence of bed-region stoichiometry on fuel nitrogen evolution and reaction in coal-fired, mass-burning stokers. The combustor operated in a batch mode simulating a small bed segment travelling through a larger combustion facility. Typically, as a test proceeded, both the superficial burning rate and NO exhaust emissions increased, reached a maximum and then decreased. However, under locally fuel-rich conditions the NO emissions peaked prior to the maximum combustion rate. Overall, staging the combustion air resulted in a substantial decrease in exhaust NO emissions. Exhaust concentrations decreased approximately linearly with decreasing bed-region stoichiometry. Fuel nitrogen conversion to NO decreased by 67% from 12% under excess-air burning to 4% during staged firing.

• OSTI ID: 5693745
• Journal Information: Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 59:2; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
014000* -- Coal
Lignite
& Peat-- Combustion
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTION KINETICS
COMBUSTORS
ELEMENTS
EMISSION
ENERGY SOURCES
FOSSIL FUELS
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
FUEL-AIR RATIO
FUELS
KINETICS
LINERS
MATERIALS
NITRIC OXIDE
NITROGEN
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PACKED BED
REACTION KINETICS
REFRACTORIES
STAGED COMBUSTION
STOICHIOMETRY
STOKERS
THERMOCHEMICAL PROCESSES