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| - Case Study of the Emissions from a Heavy-Oil-FueledHungarian Power Plant
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| - Gaseous and particulate emissions for a heavy-oil-fueled power plant in Hungary were studied.Since fly ash is a heterogeneous mixture of different particle types, average compositions obtainedby bulk analytical methods are not characteristic for the deposition and toxicological studies oftrace elements. Therefore single particles obtained from both the flue gas and the electrostaticprecipitator were analyzed by a variety of microanalytical methods. The usefulness of the single-particle electron probe microanalysis (EPMA) is shown for characterizing the different particletypes of oil fly ash. The application of the morphological and chemical parameters obtained bythis method in the modeling of the vanadium deposition due to oil fly ash emission isdemonstrated. The in-particle inhomogeneities were studied by simultaneous microscopic X-rayfluorescence and X-ray diffraction (μ-XRF/μ-XRD), using synchrotron radiation. The results showthat the oil fly ash particles are extremely heterogeneous, and a few “hot spots” having orders ofmagnitude higher Fe or elevated K and As content than the rest of the particles. The diffractionpatterns of these sites indicate polycrystalline structure.
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