|Autors: Zgureva, D. M., Boycheva, S. V.|
Title: NOVEL TECHNICAL AND ECONOMICAL SUPERIOR APPROACH FOR SYNTHESIS OF ZEOLITES FROM COAL FLY ASH
Keywords: synthesis of zeolites; adsorption; carbon emissions
Abstract: The present paper is aimed on the preparation of zeolites from lignite coal fly ash using a superior synthesis approach that combines the advantages of different established technological schemes. The novel method is directed to improvement of the energy efficiency and the raw material economy, and at the same time resulting in better quality material. Fly ash zeolites of Na-X type were synthesized applying fusion stage of fly ash/NaOH mixtures followed by atmospheric self-crystallization. The obtained zeolite structure was investigated by X-ray diffraction for different periods of crystallization of the reaction mixtures under atmospheric conditions. Comparative studies of three different methods for synthesis of Na-X were performed taking into account the specific energy and the raw material consumption, which is why the most important issues for the scale production of these materials are the economical aspects of the synthesis.
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