Microanalytical characterization of North Dakota fly ash

Technical Report · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6550302

Benson, S A; Rindt, D K; Montgomery, G G; Sears, D R

The fly ash was generated for this research using the Grand Forks Energy Technology Center Particulate Test Combustor. The coal and fly ash were characterized by several techniques. The inorganics of the coal were examined by an extraction technique which selectively removes the inorganics depending upon their association in the coal. Low temperature ashing with subsequent x-ray diffraction was used to identify the mineral phases of the coal. The fly ash was examined and analyzed by scanning electron microscope/microprobe, Electron Spectroscopy for Chemical Analysis (ESCA), x-ray diffraction and x-ray fluorescence. The most significant trend noted by all techniques was the increase of sodium and sulfur with decreasing particle size. The relatively more volatile sodium salts may sublimate to form very small particles of pure salt or they may condense on the surfaces of other particles such as aluminosilicates originating from clay minerals of the coal. The latter is supported by the results of the SEM data and the ESCA results. These results support the validity of vaporization-condensation mechanisms of particulate formation. 7 figures, 4 tables.

• Research Organization: Department of Energy, Grand Forks, ND (USA). Grand Forks Energy Technology Center
• OSTI ID: 6550302
• Report Number(s): DOE/FC-1002; CONF-830303-2; ON: DE83001282
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
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AEROSOL WASTES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ASHES
BROWN COAL
CALCIUM COMPOUNDS
CALCIUM OXIDES
CALORIFIC VALUE
CARBON
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL ANALYSIS
COAL
COHERENT SCATTERING
COMBUSTION PRODUCTS
COMBUSTION PROPERTIES
DATA
DIFFRACTION
ELECTRON MICROSCOPY
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FLY ASH
FOSSIL FUELS
FUELS
HYDROGEN
INFORMATION
IRON COMPOUNDS
IRON OXIDES
LIGNITE
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATERIALS
MICROSCOPY
MINERALOGY
MINERALS
MOISTURE
NITROGEN
NONDESTRUCTIVE ANALYSIS
NONMETALS
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
POTASSIUM COMPOUNDS
POTASSIUM OXIDES
QUANTITATIVE CHEMICAL ANALYSIS
RESIDUES
SCANNING ELECTRON MICROSCOPY
SCATTERING
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SIZE
SODIUM COMPOUNDS
SODIUM OXIDES
SPECTROSCOPY
SULFUR
SULFUR COMPOUNDS
SULFUR OXIDES
SULFUR TRIOXIDE
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
WASTES
X-RAY DIFFRACTION
X-RAY EMISSION ANALYSIS
X-RAY FLUORESCENCE ANALYSIS