Metallic species derived from fluidized bed coal combustion. [59 references]
Samples of fly ash generated by the combustion of Montana Rosebud coal in an experimental 18 inch fluidized bed combustor were collected. The use of a heated cascade impactor permitted collection of size fractionated material that avoided condensation of volatile gases on the particles. Elemental concentration trends were determined as a function of size and temperature and the results compared to published reports for conventional power plants. The behavior of trace metals appears to be substantially different in the two systems due to lower operating temperatures and the addition of limestone to the fluidized bed. Corrosion of the impactor plates was observed at the highest temperature and lowest limestone feed rate sampled during the study. Data from the elemental concentration and leaching studies suggest that corrosion is most likely due to reactions involving sodium sulfate. However, it is concluded that corrosion is less of a potential problem in fluidized-bed systems than in conventional coal-fired systems.
- Research Organization:
- Colorado State Univ., Fort Collins (USA). Dept. of Chemistry
- DOE Contract Number:
- AS21-77MC08196
- OSTI ID:
- 6651008
- Report Number(s):
- DOE/MC/08196-T1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALKALI METAL COMPOUNDS
CORROSIVE EFFECTS
COAL
FLUIDIZED-BED COMBUSTION
FLY ASH
CHEMICAL COMPOSITION
PARTICLE SIZE
ANTIMONY
ARSENIC
CASCADE IMPACTORS
COPPER
ELECTRON MICROSCOPY
ELEMENTS
EXPERIMENTAL DATA
GALLIUM
LEACHING
SAMPLING
SELENIUM
SULFUR TRIOXIDE
TEMPERATURE DEPENDENCE
TRACE AMOUNTS
AEROSOL WASTES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
DATA
DISSOLUTION
ENERGY SOURCES
FOSSIL FUELS
FUELS
INFORMATION
MATERIALS
METALS
MICROSCOPY
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
SEMIMETALS
SEPARATION PROCESSES
SIZE
SULFUR COMPOUNDS
SULFUR OXIDES
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
WASTES
014000* - Coal
Lignite
& Peat- Combustion