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Artículo

Phase transformations during the zeolitization of fly ashes

Monzón, Jorge DanielIcon ; Pereyra, Andrea MarisaIcon ; Conconi, María Susana; Basaldella, Elena Isabel
Fecha de publicación: 04/2017
Editorial: Elsevier
Revista: Journal of Environmental Chemical Engineering
ISSN: 2213-3437
Idioma: Inglés
Tipo de recurso: Artículo publicado

Resumen

The reactivity of a fly ash discarded from a thermoelectric power station was evaluated in terms of its hydrothermal conversion into NaA-containing products. The influence of ash pretreatments and the effect of changes in the synthesis mixture composition on the evolution of the solid phase toward its conversion into zeolitic materials were studied. Activation by milling was not as effective as alkaline fusion. The highest levels of fly ash reactivity were obtained by applying an alkaline fusion treatment using sodium carbonate at 800 °C. It was observed that this particular ash activation induces a solid reordering that generates crystalline materials identified as NaAlSiO2 polymorphs that in turn are easily transformed into zeolite structures. Synthesis conditions for ash zeolitization as high as 60% were established.
Palabras clave: Fly Ashes , Hydrothermal Synthesis , Pretreatment , Zeolites
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
Identificadores
URI: http://hdl.handle.net/11336/63658
DOI: http://dx.doi.org/10.1016/j.jece.2017.02.022
URL: https://www.sciencedirect.com/science/article/pii/S2213343717300738
Colecciones
Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos(CINDECA)
Articulos de CENTRO DE INV EN CS.APLICADAS "DR.JORGE J.RONCO"
Citación
Monzón, Jorge Daniel; Pereyra, Andrea Marisa; Conconi, María Susana; Basaldella, Elena Isabel; Phase transformations during the zeolitization of fly ashes; Elsevier; Journal of Environmental Chemical Engineering; 5; 2; 4-2017; 1548-1553
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