Elemental composition of atmospheric fine-particles emitted from coal burned in a modern electric power plant equipped with a flue-gas desulfurization system
Improved control devices now frequently installed on conventional coal-utility boilers drastically affect the quantity, chemical composition, and physical characteristics of fine-particles emitted to the atmosphere from these sources. Fly-ash aerosols were sampled upstream and downstream from a modern lime-slurry, spray-tower system installed on a 430-Mw(e) coal utility boiler. Particulate samples were collected in situ on membrane filters and in University of Washington MKIII and MKV cascade impactors. The MKV impactor, operated at reduced pressure and with a cyclone preseparator, provided 13 discrete particle-size fractions with median diameters ranging from 0.07 to 20 mu m; with up to 6 of the fractions in the highly respirable submicron particle range. The concentrations of up to 35 elements and estimates of the size distributions of particles in each of the fly-ash fractions were determined by instrumental neutron activation analysis and by electron microscopy, respectively. Mechanisms of fine-particle formation and chemical enrichment in the flue-gas desulfurization system are discussed.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6164130
- Report Number(s):
- UCRL-85035; CONF-801266-1; ON: DE81030073
- Country of Publication:
- United States
- Language:
- English
Similar Records
Confined zone dispersion flue gas desulfurization demonstration. Quarterly report No. 9, November 17, 1992--February 16, 1993
Investigation of the mechanism of fly-ash formation in coal-fired utility borders. Quarterly report, February 1--April 30, 1978
Related Subjects
010800 -- Coal
Lignite
& Peat-- Waste Management
010900 -- Coal
Lignite
& Peat-- Environmental Aspects
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACTINIDES
ACTIVATION ANALYSIS
AEROSOL MONITORING
AEROSOL WASTES
AIR POLLUTION
ANTIMONY
ARSENIC
ASHES
BARYON REACTIONS
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHROMIUM
COAL
COBALT
COMBUSTION PRODUCTS
DATA
DATA COMPILATION
DESULFURIZATION
ELECTRON MICROSCOPY
ELEMENTS
ENERGY SOURCES
ENVIRONMENTAL EFFECTS
FLUE GAS
FLY ASH
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
GASEOUS WASTES
HADRON REACTIONS
INFORMATION
MANGANESE
MATERIALS
METALS
MICROSCOPY
MOLYBDENUM
MONITORING
NEUTRON REACTIONS
NICKEL
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
PARTICLE SIZE
POLLUTION
POWER PLANTS
REFRACTORY METALS
RESIDUES
SAMPLING
SELENIUM
SEMIMETALS
SIZE
THERMAL POWER PLANTS
TRACE AMOUNTS
TRANSITION ELEMENTS
TUNGSTEN
URANIUM
VANADIUM
WASTES
ZINC