Reduction of NO/sub x/ and solids emissions by staged combustion of coal liquid fuels

Conference · Fri Jan 01 04:00:00 EST 1982 · Symp. (Int.) Combust., (Proc.); (United States)

OSTI ID:5730131

Beer, J M ^[1]; Jacques, M T; Farmayan, W F; Gupta, A K; Hanson, S; Rovesti, W C

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1. Massachusetts Inst. of Tech., Cambridge

Results are reported of experiments on the amenability of SRC-II coal-derived liquid fuels to combustion process modification by air staging for NO/sub x/ and solids emission control. Two experimental systems were used: (1) a laboratory laminar flow reactor for determining rates of evolution of fuel-bound nitrogen from pyrolyzing arrays of 150 ..mu..m SRC-II fuel droplets, and (2) a pilot plant scale furnace for determining the effects of combustion air staging, air preheat, quality of atomization and fuel type on the conversion of fuel-nitrogen to NO/sub x/. Three SRC-II fuel types were considered in the studies: a medium distillate (450 to 500 K boiling range), a heavy distillate (560 to 728 K boiling range), and a 2.9/l blend of medium to heavy distillate. Results of the droplet array pyrolysis studies show that, in general nitrogen evolution rates are trailing mass vaporization rate at the beginning of droplet vaporization but that the two rates are comparable after a mass loss of 10 to 20%. For the heavy distillate and for the case of high rates of vaporization, nitrogen evolution rates exceed those of vaporization due to departments from equilibrium distillation conditions. Results of the combustion experiments show that there is a significant potential for controlling NO/sub x/ and particulate matter emissions in coal-derived liquid fuel flames by combustion modifications.

• OSTI ID: 5730131
• Report Number(s): CONF-820801-
• Conference Information: Journal Name: Symp. (Int.) Combust., (Proc.); (United States)
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405 -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
014000* -- Coal
Lignite
& Peat-- Combustion
AIR POLLUTION CONTROL
CHALCOGENIDES
CHEMICAL REACTIONS
COAL LIQUEFACTION
COAL LIQUIDS
COMBUSTION
CONTROL
DROPLETS
EVAPORATION
FLUIDS
LIQUEFACTION
LIQUIDS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
PHASE TRANSFORMATIONS
POLLUTION CONTROL
SRC-II PROCESS
THERMOCHEMICAL PROCESSES