Gas turbine combustion of a minimally cleaned, coal-derived low-BTU gas

Conference · Fri Mar 01 04:00:00 EST 1985 · Am. Soc. Mech. Eng., (Pap.); (United States)

OSTI ID:5457882

Blanton, J C; Smith, D P

As part of the joint GE/DoE Water-Cooled Components Test Program,/sup 1/ a series of tests were performed involving the combustion of a minimally cleaned low-Btu coal gas in a pressurized gas turbine simulator. The fuel gas was produced in a 1-ton/hr advanced fixed-bed gasifier using Illinois number6 coal, and filtered of particulate in a full-pressure, full-temperature cyclone separator. The resulting product had a gross heating value of approximately 5000 kJ/kg at a temperature of 540/sup 0/C and a pressure of 22 bar. Numerous contaminants also remained in the fuel gas, including approximately 100 ppmw particulate matter (coal dust of 3 ..mu..m average size), 20004000 ppmv ammonia, 2000-2500 ppmv H/sub 2/S, and 0.5 - 1.0% vaporized tars, oils, phenols, and other condensible hydrocarbons. The fuel gas was burned with air at 6-7 bar pressure and 400/sup 0/C temperature in a gas turbine combustion system at overall fuel-air ratios up to 0.25 (overall equivalence ratio 0.36). Gaseous emissions were sampled in the exhaust stream and measurements made for O/sub 2/, CO/sub 2/, CO, unburned hydrocarbons, NO /sub x/ , and SO /sub x/ . The CO and unburned hydrocarbon emissions were both below 20 ppmv at full firing conditions, indicating acceptable combustion efficiency. The NO /sub x/ levels measured were up to 500 ppmv, and were due to the of conversion of fuel-bound nitrogen (ammonia principally). The SO /sub x/ emissions directly followed the oxidation of fuel-bound sulfur (H/sub 2/S principally). At part-load conditions, emissions of CO and unburned hydrocarbons were observed to increase, as expected. Stable operation was maintained down to a combustion system temperature rise of approximately 350/sup 0/C.

• Research Organization: General Electric Company, Corporate Research and Development, Schenectady, New York
• OSTI ID: 5457882
• Report Number(s): CONF-850351-
• Conference Information: Journal Name: Am. Soc. Mech. Eng., (Pap.); (United States) Journal Volume: 85-GT-160
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200104 -- Fossil-Fueled Power Plants-- Components
200108* -- Fossil-Fueled Power Plants-- Fuels-- (1980-)
ANALOG SYSTEMS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
COAL GASIFICATION
COMBUSTION CONTROL
COMBUSTION KINETICS
COMBUSTION PRODUCTS
CONTROL
FLUIDS
FUEL GAS
FUEL SUBSTITUTION
FUEL-AIR RATIO
FUELS
FUNCTIONAL MODELS
GAS FUELS
GAS TURBINES
GASES
GASIFICATION
KINETICS
LOW BTU GAS
MACHINERY
OXIDES
OXYGEN COMPOUNDS
PRODUCTION
REACTION KINETICS
RESEARCH PROGRAMS
SIMULATORS
SULFUR COMPOUNDS
SULFUR OXIDES
THERMOCHEMICAL PROCESSES
TURBINES
TURBOMACHINERY