Evaluation of advanced combustion concepts for dry NO/sub x/ suppression with coal-derived, gaseous fuels
A test program has been completed to determine the emissions performance of a rich-lean combustor (developed for liquid fuels in Phase I of the DOE/LeRC Advanced Conversion Technology Project) for combustion of simulated coal gases ranging in heating value from 167 to 244 Btu/scf (7.0 to 10.3 MJ/NCM). The 244 Btu/scf gas is typical of the product gas from an oxygen-blown gasifier, while the 167 Btu/scf gas is similar to that from an air-blown gasifier. NO/sub x/ performance of the rich-lean combustor did not meet program goals with the 244 Btu/scf gas because of high thermal NO/sub x/, similar to levels expected from conventional lean-burning combustors. The NO/sub x/ emissions are attributed to inadequate fuel-air mixing in the rich stage resulting from the design of the large central fuel nozzle delivering 71% of the total gas flow. NO/sub x/ yield from ammonia injected into the fuel gas decreased rapidly with increasing ammonia level, and is projected to be less than 10% at NH/sub 3/ levels of 0.5% or higher. NO/sub x/ generation from NH/sub 3/ is significant at ammonia concentrations significantly less than 0.5%. These levels may occur depending on fuel gas cleanup system design. CO emissions, combustion efficiency, smoke and other operational performance parameters were satisfactory. A test was completed with a catalytic combustor concept with petroleum distillate fuel. Reactor stage NO/sub x/ emissions were low (1.4g NO/sub x//kg fuel). CO emissions and combustion efficiency were satisfactory. Airflow split instabilities occurred which eventually led to test termination.
- Research Organization:
- General Electric Co., Schenectady, NY (USA); National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
- DOE Contract Number:
- AI01-77ET13111
- OSTI ID:
- 6737815
- Report Number(s):
- DOE/NASA/13111-11; NASA-TM-82985; CONF-821018-4; ON: DE83001399
- Resource Relation:
- Conference: IEEE/ASME/ASCE joint power generation conference, Denver, CO, USA, 17 Oct 1982
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COMBUSTION PRODUCTS
CHEMICAL COMPOSITION
INTERMEDIATE BTU GAS
COMBUSTION
LOW BTU GAS
NITROGEN OXIDES
AIR POLLUTION CONTROL
CATALYTIC COMBUSTORS
COAL GASIFICATION
COMBINED-CYCLE POWER PLANTS
EXPERIMENTAL DATA
TEST FACILITIES
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTORS
CONTROL
DATA
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
GASIFICATION
INFORMATION
NITROGEN COMPOUNDS
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POWER PLANTS
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
014000* - Coal
Lignite
& Peat- Combustion