Abstract
This paper concerns the identification and characterization of the Faujasite-Zeolite phase resulting from the alkaline activation of Fly Ash (FA) by sodium hydroxide (NaOH). FA was chemically analyzed and used to prepare the zeolitic material. Alkali activated materials are described as materials obtained by the reaction between precursors and activators. Two key process parameters have been taken into account for the synthesis of this material: the liquid/solid ratio, the concentration of the alkaline solution. For this purpose, Alkali activated FA (AAFA) was prepared by combining Moroccan FA (ASTM class F) and sodium hydroxide (purity, 99%). The FA mixture (100 g) was heated to 80–90 °C in aqueous NaOH (5 mol / L, 300 mL) with magnetic stirring and kept at reflux for 6 h. The synthesized zeolite are characterized using various techniques including X-ray diffraction (XRD),Fourier-transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA) were conducted to evaluate the characteristics of the resulting products. The thermogravimetric results reveal the presence of new products such as Faujasite.
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