Winny Wulandari
Coal burning in power plants does not only produce energy, but also produces a large number of byproducts such as coal fly ash. Zeolite is a crystal material consisting of aluminosilicate with three-dimensional networks of silicon and tetrahedral aluminum connected by oxygen atoms, which have a variety of applications including catalysts and adsorbents. In this study, coal gray was used to synthesize Zeolite A through alkaline fusion followed by a hydrothermal method. The experiment was carried out in two stages, namely pretreatment of coal flying ash and zeolite synthesis. The pretreatment process with chloride acid has succeeded in reducing iron oxides and part of the alkali oxide. The characteristics of morphology of coal flown ashes and flying ashes that have been processed previously are the process of aging the hydrothermal process. Zeolite A is relatively pure without hydroxcoles successfully synthesized from the ash coal flies with alkaline fusion followed by a hydrothermal method. The optimal hydrothermal time is 1 hour with the ratio of molar SI / AL 0.75 and H2O / Na2O molar ratio 39.04. Keywords: coal, power plant, coal flying ash, zeloit.
Application of appropriate technology
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