Method for assigning signatures to coal fly ash samples by an individual particle analysis technique
Coal fly ash samples from different sources may have similar average chemical element composition. Since the composite sample is often highly amorphous, crystalline compound identification is of limited use in characterizing the material. Thus, traditional and widely applied analytical techniques lack the appropriate resolution for easily distinguishing one fly ash sample from another. However, the individual particles in a fly ash sample are not homogeneous with respect to each other - a feature which may be of significant value in characterizing and identifying sources of this material. Individual particle analysis has become practical for widespread application by the use of an analytical system which integrates a scanning electron microscope, an energy-dispersive x-ray analyzer and an image analysis system to automatically examine hundreds of particles per hour, extracting information on size, shape, and relative x-ray percent of selected elements. The analysis of many individual particles from a coal fly ash source and the categorization of these particles based upon the relative abundance of energy-dispersive spectra types provides a method for assigning a signature to each fly ash source.
- OSTI ID:
- 6286671
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
FLY ASH
CHEMICAL COMPOSITION
SCANNING ELECTRON MICROSCOPY
SPECTRAL RESPONSE
X-RAY EMISSION ANALYSIS
PARTICLE SIZE CLASSIFIERS
DESIGN
COAL
IMAGE PROCESSING
AEROSOL WASTES
ASHES
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
ELECTRON MICROSCOPY
ENERGY SOURCES
EQUIPMENT
FOSSIL FUELS
FUELS
MATERIALS
MICROSCOPY
NONDESTRUCTIVE ANALYSIS
PROCESSING
RESIDUES
WASTES
010900* - Coal
Lignite
& Peat- Environmental Aspects
400104 - Spectral Procedures- (-1987)