Synthesis of zeolites by alkaline activation of ferro-aluminous fly ash

descriptionPublicationkeyboard_double_arrow_right Article 01 Aug 1995 English Publisher:Elsevier BVJournal:Fuel, volume 74, pages 1,226-1,231 (issn: 0016-2361,

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Authors: Querol, Xavier; Alastuey, Andrés; Fernandez-Turiel, J. L.; López Soler, Ángel;

doi: 10.1016/0016-2361(95)00044-6

handle: 10261/31643

Synthesis of zeolites by alkaline activation of ferro-aluminous fly ash

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Abstract

Zeolites were synthesized from fly ash by alkaline hydrothermal activation. High-Fe fly ash from the Teruel power station in NE Spain was the starting material. The activation was performed by 0.1 M NaOH and KOH solution in a closed system. Zeolite formation was studied as a function of temperature (60 and 150°C), reaction time (24, 168 and 336 h) and sample/solution ratio (30, 60, 100 and 200 gl−1). The zeolitic products synthesized were phillipsite, merlinoite, analcime, zeolite Na-P1 and nosean. Other reaction products identified were portlandite and bayerite. The activated material in the fly ash was mainly glass and quartz. The highest zeolite synthesis efficiency was 75%.

The present study was supported by the European Coal and Steel Community and by the Spanish CICYT.

6 páginas, 5 figuras, 2 tablas.

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Keywords

Alkaline activation, Zeolites, Fly ash

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