Temporal Variation in the Compositional and Thermal Characteristics of Greek Lignite Bottom Ash Samples

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Bottom ash samples were collected during four seasons from the largest lignite-fired power plant of Greece, named Agios Dimitrios. Dry sieving and particle size analysis were performed for all samples. Coarse fractions were initially examined by a stereo-microscope. Four fractions (>1.25, 0.63–1.25, 0.18–0.63, 1.25 mm) of all samples, indicating a problematic combustion within the chambers and a potential of reburning these coarse material in a waste to energy application.