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Design strategy for the combustion of coal-derived liquid fuels

Technical Report ·
OSTI ID:5073244
; ; ;
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 particulates 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 in the conversion of fuel-nitrogen to NO/sub x/. These latter experiments were guided by computations of the conversion of fuel-nitrogen as a function of fuel equivalence ratio, temperature and residence time in the fuel rich stage of the flame. Results of the combustion experiments show that there is a significant potential for controlling NO/sub x/ and particulates emissions in coal-derived liquid fuel flames by combustion modifications; NO/sub x/ emission levels were reduced from 550 ppM (at 3% O/sub 2/) measured in fast mixing single stage flames to less than 100 ppM (at 3% O/sub 2/) under optimized staged combustion conditions with particulates emission levels below 0.33 x 10/sup -2/ lb/sup 0/10/sup 6/ Btu. The overall excess air was maintained at approx. 10% in the experiments.
Research Organization:
Massachusetts Inst. of Tech., Cambridge (USA). Energy Lab.
OSTI ID:
5073244
Report Number(s):
EPRI-AP-2517; ON: DE82905496
Country of Publication:
United States
Language:
English

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Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
014000* -- Coal
Lignite
& Peat-- Combustion
090110 -- Hydrocarbon Fuels-- Properties-- (1979-1989)
10 SYNTHETIC FUELS
42 ENGINEERING
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
AIR POLLUTION ABATEMENT
ATOMIZATION
BOILERS
CHALCOGENIDES
COAL LIQUEFACTION
COAL LIQUIDS
COMBUSTION PRODUCTS
DATA
DROPLETS
EXPERIMENTAL DATA
FLAMES
FLUIDS
FUELS
INFORMATION
LIQUEFACTION
LIQUIDS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PARTICLES
POLLUTION ABATEMENT
SRC-II PROCESS
SYNTHETIC FUELS
THERMOCHEMICAL PROCESSES