Phase-mineral and chemical composition of fractions separated from composite fly ashes at the Soma power station, Turkey

Characterization and comparison of leaching behaviors of fly ash samples from three different power plants in Turkey

“…Anhydrite is also formed by dehydration of gypsum, which is present in the feed coal, during coal combustion [14,37]. These findings correspond to the previous studies on SFA [45,46,50,51]. Consequently, mineralogical compositions of fly ashes correlate with their feed coal compositions reported by [2,26,50,51].…”

“…3d 6) are widespread in YFA. SFA involves rather individual particles and agglomerates consisting of spherical or irregular shaped particulates, which were also reported by the former studies [45,46,51]. There are also present hemisphere particles in this sample.…”

Quantitative evaluation of minerals in fly ashes of biomass, coal and biomass–coal mixture derived from circulating fluidised bed combustion technology

“…X-ray diffraction (XRD) has long been used as a definitive technique for identifying minerals and other crystalline phases in a wide range of materials [4], including coal ash [5][6][7]. It is especially useful where the individual particles are too small to be reliably identified by microscopic techniques.…”

Mercury capture by native fly ash carbons in coal-fired power plants

“…The classification of fly ash carbons has gone through a number of iterations through the years [60-62, 110-115]. Based on those discussions, and on the philosophy behind coke petrography [116], Hower et al [117] developed a system suitable for the bituminous-coal-derived fly ashes of the eastern US.…”