The influence of separately and combined bentonite and kaolinite as binders for pelletization of NaA zeolite from coal fly ash
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Pelletization of zeolitic materials is required to facilitate their practical industrial and commercial applications. Zeolite-NaA was
synthesized from fly ash by the fusion method and shaped into spherical granules. Bentonite, kaolinite, and a combination of
bentonite with kaolinite were tested as binders with different contents from 5 to 10 wt%. The pellet formation was optimized. The
physicochemical properties of binders, zeolite powder, and zeolite granular were characterized by X-ray fluorescence spectroscopy
(XRF), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), nitrogen adsorption/desorption isotherm, and
scanning electron microscopy (SEM) among other techniques. Deformation and breakage behavior of spherical granulates by
compression was also studied. The best performance was obtained by the pellet with 10% bentonite with satisfactory mechanical
strength and water resistance. The XRD and SEM results revealed NaA zeolite granular with a typical cubic shape and high
crystallinity formed on the surface of bentonite. This result presents a potential use of the coal fly ash to obtain pelletized NaA
zeolite following the principles of circular economy and the sustainable development goals (SDGs), particularly SDG 12.
Como referenciar
BERTOLINI, T.C.R.; FUNGARO, D.A.; MAHMOUD, A.E.D. The influence of separately and combined bentonite and kaolinite as binders for pelletization of NaA zeolite from coal fly ash. Cerâmica, v. 68, n. 387, p. 375-384, 2022. DOI: 10.1590/0366-69132022683873322. Disponível em: http://repositorio.ipen.br/handle/123456789/33396. Acesso em: 27 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.