Electron microscopy and phase analysis of fly ash from pressurized fluidized bed combustion

摘要: Abstract The characterization of the typical fly ashes from pressurized fluidized bed combustion system (PFBC) in Japan and Europe was carried out by electron microscopy phase analysis using energy-dispersive X-ray spectroscopy (EDX). purity limestone as in-bed sulfur removal sorbent influences desulfurization reaction. high-purity yielded both hydroxyl ellestadite anhydrite Japanese PFBC ashes, while dolomite-rich European ashes. When used, particles were observed independent or rim around particles. Al 2 O 3 content glassy inversely proportional to CaO phase, suggesting that phases formed metakaoline calcite end members. Since ellestadite, are reactive under hydrothermal conditions, expected be used raw materials for autoclaved products.