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Impact of fly ash fractionation on the zeolitization process.


ABSTRACT: Coal combustion product in the form of fly ash has been sieved and successfully utilised as a main substrate and a carrier of silicon and aluminium in a set of hydrothermal syntheses of zeolites. The final product was abundant in zeolite X phase (Faujasite framework). Raw fly ash as well as its derivatives, after being sieved (fractions: ? 63, 63-125, 125-180 and ? 180 µm), and the obtained zeolite materials were subjected to mineralogical characterisation using powder X-ray diffraction, energy-dispersive X-ray fluorescence, laser diffraction-based particle size analysis and scanning electron microscopy. The influence of fraction separation on the zeolitization process under hydrothermal synthesis was investigated. Analyses performed on the derived zeolite X samples revealed a meaningful impact of the given fly ash fraction on synthesis efficiency, chemistry, quality as well as physicochemical properties, while favouring a given morphological form of zeolite crystals. The obtained zeolites possess great potential for use in many areas of industry and environmental protection or engineering.

SUBMITTER: Czarna-Juszkiewicz D 

PROVIDER: S-EPMC7084421 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature

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Impact of fly ash fractionation on the zeolitization process.

Czarna-Juszkiewicz Dorota D   Kunecki Piotr P   Panek Rafał R   Madej Jarosław J   Wdowin Magdalena M  

Materials (Basel, Switzerland) 20200225 5


Coal combustion product in the form of fly ash has been sieved and successfully utilised as a main substrate and a carrier of silicon and aluminium in a set of hydrothermal syntheses of zeolites. The final product was abundant in zeolite X phase (Faujasite framework). Raw fly ash as well as its derivatives, after being sieved (fractions: ≤ 63, 63-125, 125-180 and ≥ 180 µm), and the obtained zeolite materials were subjected to mineralogical characterisation using powder X-ray diffraction, energy-  ...[more]

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