Impact of fly ash fractionation on the zeolitization process.
Dorota Czarna-JuszkiewiczPiotr KuneckiRafał PanekJarosław MadejMagdalena WdowinPublished in: Materials (Basel, Switzerland) (2020)
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.
Keyphrases
- electron microscopy
- municipal solid waste
- sewage sludge
- heavy metals
- anaerobic digestion
- drosophila melanogaster
- human health
- risk assessment
- high resolution
- magnetic resonance imaging
- particulate matter
- ionic liquid
- magnetic resonance
- gas chromatography mass spectrometry
- solid phase extraction
- high speed
- computed tomography
- liquid chromatography
- air pollution
- climate change