Low NOx combustion concepts for advanced power generation systems firing low-Btu gas. Final report June 1973--March 1977

Technical Report · Tue Nov 01 04:00:00 EST 1977

OSTI ID:6496051

Tyson, T J; Heap, M P; Kau, C J; Folsom, B A; Brown, N D

The report gives results of an analysis of several advanced power generating concepts firing low-Btu gasified coal. A combined gas-turbine/steam-cycle power plant with integrated gasifier was the most promising from fuel utilization and economic viewpoints. Two representative combined cycle systems were chosen for detailed NOx emission and analysis: an advanced-technology high-temperature gas turbine with a waste heat boiler; and a supercharged boiler with a current-technology gas turbine. NOx emissions were investigated using a kinetic model, which was validated by comparison with best available experimental data and then applied to idealized combustor configurations. Calculations indicate that staged combustion involving rich primary zones and controlled mixing secondary zones minimizes thermal NOx and NOx produced from ammonia in the fuel gas. Minimum calculated NOx levels were: 150 ppm for the high temperature turbine, with a 0.45 equivalence ratio and 4000 ppm of fuel ammonia; and 125 ppm for the supercharged boiler, with 5% excess air and 500 ppm of fuel ammonia. These results need to be verified experimentally, but they show the potential for achieving NOx emissions within the Federal NSPS without requiring ammonia removal from the fuel gas.

• Research Organization: Energy and Environmental Research Corp., Santa Ana, CA (USA); Combustion Engineering, Inc., Windsor, CT (USA)
• OSTI ID: 6496051
• Report Number(s): PB-282983
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404 -- Coal
Lignite
& Peat-- Gasification
20 FOSSIL-FUELED POWER PLANTS
200102* -- Fossil-Fueled Power Plants-- Power Cycles
AIR POLLUTION CONTROL
AMMONIA
BOILERS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL GASIFICATION
COMBINED-CYCLE POWER PLANTS
COMBUSTION
COMBUSTORS
ENERGY SOURCES
FLUE GAS
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GAS TURBINES
GASEOUS WASTES
GASES
GASIFICATION
HYDRIDES
HYDROGEN COMPOUNDS
LOW BTU GAS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POWER PLANTS
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
TURBINES
TURBOMACHINERY
WASTES