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A COMPARATIVE STUDY ON THE ZEOLITIZATION OF COAL FLY ASH FROM TPP MARITSA 3 WITH NAOH AND KOH
Abstract
A comparative study on the zeolitization of coal fly ash from thermo-power plant “Maritsa 3” (Dimitrovgrad) with KOH and NaOH solutions of different concentrations has been made. The initial materials have been activ ated by application of “conventional” method of hydrothermal treatment at temperatures near 100 °C, atmosphere pressure and liquid/solid ratio of 10 ml.g -1. Three concentration levels for KOH and four concentration levels for NaOH have been used. The initial fly ashes and the obtained zeolitized fly ash materials have been investigated by means of scanning electron microscopy and energy- dispersive X-Ray analyses. The presence of zeolites in the activated fly ashes has been confirmed by X-Ray Diffraction spectroscopy. Key words: Coal fly ash, Zeolitization, Alkali activation, SEM-EDX, XRD.
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