Phase transformation during the zeolitization of fly ashes

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...

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Autores principales: Monzón, Jorge, Pereyra, Andrea, Conconi, Susana, Basaldella, Elena
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: Elsevier 2018
Materias:
Fly ashes, Pretreatment, Hydrothermal synthesis, Zeolites
Acceso en línea:http://hdl.handle.net/20.500.12272/3117
Aporte de:
RIA - Repositorio Institucional Abierto (UTN) de Universidad Tecnológica Nacional
id I68-R174-20.500.12272-3117
record_format dspace
institution Universidad Tecnológica Nacional
institution_str I-68
repository_str R-174
collection RIA - Repositorio Institucional Abierto (UTN)
language Inglés
topic Fly ashes, Pretreatment, Hydrothermal synthesis, Zeolites
spellingShingle Fly ashes, Pretreatment, Hydrothermal synthesis, Zeolites
Monzón, Jorge
Pereyra, Andrea
Conconi, Susana
Basaldella, Elena
Phase transformation during the zeolitization of fly ashes
topic_facet Fly ashes, Pretreatment, Hydrothermal synthesis, Zeolites
description 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 activatiorn 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.
format Artículo
publishedVersion
Artículo
author Monzón, Jorge
Pereyra, Andrea
Conconi, Susana
Basaldella, Elena
author_facet Monzón, Jorge
Pereyra, Andrea
Conconi, Susana
Basaldella, Elena
author_sort Monzón, Jorge
title Phase transformation during the zeolitization of fly ashes
title_short Phase transformation during the zeolitization of fly ashes
title_full Phase transformation during the zeolitization of fly ashes
title_fullStr Phase transformation during the zeolitization of fly ashes
title_full_unstemmed Phase transformation during the zeolitization of fly ashes
title_sort phase transformation during the zeolitization of fly ashes
publisher Elsevier
publishDate 2018
url http://hdl.handle.net/20.500.12272/3117
work_keys_str_mv AT monzonjorge phasetransformationduringthezeolitizationofflyashes
AT pereyraandrea phasetransformationduringthezeolitizationofflyashes
AT conconisusana phasetransformationduringthezeolitizationofflyashes
AT basaldellaelena phasetransformationduringthezeolitizationofflyashes
bdutipo_str Repositorios
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