PAH emissions from combustion of coal liquids in industrial furnace
The possible environmental impact of substituting fuel oils derived from coal instead of petroleum was investigated using an industrial furnace. Emphasis was placed on the emissions of polynuclear aromatic hydrocarbons (PAH). The nonpetroleum fuel oil (ECLP-SS) was produced from Texas lignite coal by the Exxon Donor Solvent Process at the Exxon Coal Liquefaction Pilot Plant. The effects of furnace loading and flue-gas temperature on PAH emissions were studied by varying both the firing rate of the burner and the amount of wall insulation in the water-cooled furnace. The research furnace was fully instrumented for measuring the concentration of oxygen, carbon monoxide (CO), and nitrogen oxides (NO/sub x/) in the flue gas. PAH emissions were measured by a special sampling train and analytical method. Seventeen successful test runs were completed using the ECLP-SS, natural gas, and No. 6 fuel oil. Highly luminous flames indicated the formation of carbon particles during the combustion of both fuel oils; however, no visible soot emissions were observed with either fuel oil over the entire range of operation. The very low level of CO emissions indicated complete combustion with all test fuels at all operating conditions, and the calculated combustion efficiencies were 99.9+ percent. As expected, because of its low nitrogen content, NO/sub x/ emissions with ECLP-SS were below the Federal standard for new stationary sources. There are no PAH emission limits in the Federal standards at this time, and none are planned. We used the predominant PAH species of pyrene, benz(a)anthracene, benzo(a)pyrene, benzo(e)pyrene, benzo(b)fluoranthene, and benzo(g,h,i)perylene to indicate total PAH concentration. When compared at the same furnace condition, we found that PAH emissions were not statistically different for the three fuels tested. Therefore, we conclude that the combustion of coal-derived fuel oils should not generate objectionable PAH emissions in industrial furnaces.
- Research Organization:
- Phillips Petroleum Co., Bartlesville, OK (USA); Zink (J.) and Co., Tulsa, Okla (USA)
- OSTI ID:
- 6036096
- Report Number(s):
- CSS/CI-83-09; CONF-830358-10; ON: DE83902026
- Resource Relation:
- Conference: Spring meeting of the Central States Section of the Combustion Institute, Lexington, KY, USA, 21 Mar 1983
- Country of Publication:
- United States
- Language:
- English
Similar Records
Determination of PAH in SRM 1582, Wilmington crude oil
Identification and comparative genotoxicity of polycyclic aromatic hydrocarbons and related nitrogen-containing heteroatomic species in products from coal liquefaction processes
Related Subjects
54 ENVIRONMENTAL SCIENCES
COAL LIQUIDS
COMBUSTION PRODUCTS
FUEL OILS
NATURAL GAS
POLYCYCLIC AROMATIC HYDROCARBONS
EMISSION
MONITORING
BENZANTHRACENE
BENZOPYRENE
CARBON MONOXIDE
CHEMICAL ANALYSIS
CONDENSED AROMATICS
EXXON LIQUEFACTION PROCESS
FLUE GAS
LIGNITE
LOADING RATE
NITROGEN OXIDES
ON-LINE MEASUREMENT SYSTEMS
PERYLENE
PYRENE
TEMPERATURE EFFECTS
AROMATICS
BROWN COAL
CARBON COMPOUNDS
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
COAL
COAL LIQUEFACTION
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASEOUS WASTES
GASES
HYDROCARBONS
LIQUEFACTION
LIQUID FUELS
LIQUIDS
MATERIALS
NITROGEN COMPOUNDS
OILS
ON-LINE SYSTEMS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
THERMOCHEMICAL PROCESSES
WASTES
014000* - Coal
Lignite
& Peat- Combustion
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)