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The paper reports a study of fly ashes obtained as a result of black and brown coal combustion by the following methods: chemical analysis, X-ray diffraction (XRD), infrared (IR) spectroscopy, differential thermal analysis, (DTA), low-temperature nitrogen and methylene blue adsorption and scanning electron microscopy (SEM). The samples of fly ashes of different types were characterised by different...
Changes in the porous structure of fly ashes ZS-13 subjected to chemical treatment with solutions of NaOH, NaOH/NH 4 HCO 3 , EDTA, and HCl are examined. The initial material with 3 m 2 /g surface area and 0.01 cm 3 /g pore volume after modification revealed an increased surface area and pore volume. The greatest increase in the surface area equal to 105 m 2 ...
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