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KUZIELOVA, E. ŽEMLIČKA, M. HUDEC, P. MÁSILKO, J. PALOU, M.
Originální název
Influence of hydrothermal treatment parameters on the phase composition of zeolites
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
Analcime was prepared by hydrothermal transformation of metakaolin-based geopolymer activated by means of sodium water glass. Gradual transformation of geopolymer through primary and unstable zeolitic phases up to final analcime was studied as a function of hydrothermal treatment duration (6-48 h) and access of water vapour under the selected conditions (165 degrees C, 0.5 MPa). Composition, microstructure, and thermal stability of the prepared samples were assessed using simultaneous thermogravimetry and differential scanning calorimetry, X-ray diffraction and high-temperature XRD analyses, and scanning electron microscopy. In the case of shorter autoclaving and access of water vapour, the mix of different zeolitic phases was formed: analcime, zeolite P2 gmelinite-Na, and chabazite-Na. From the time of 24 h and autoclaving in the closed moulds, pure cubic analcime was detected. Uniform microstructure of these samples comprised of trapezoid particles with the diameter between 50 and 60 mu m. Prolongation of autoclaving time did not lead to the significant change of particle size and their composition. Dehydration of detected zeolites took place through the formation of defect or unknown zeolitic structures before the structural collapse happened.
Klíčová slova
Metakaolin; Analcime; Hydrothermal curing; Thermal stability of zeolites
Autoři
KUZIELOVA, E.; ŽEMLIČKA, M.; HUDEC, P.; MÁSILKO, J.; PALOU, M.
Vydáno
1. 10. 2020
Nakladatel
SPRINGER
Místo
DORDRECHT
ISSN
1588-2926
Periodikum
Journal of Thermal Analysis and Calorimetry
Ročník
142
Číslo
1
Stát
Maďarsko
Strany od
37
Strany do
50
Strany počet
14
URL
https://link.springer.com/article/10.1007%2Fs10973-020-09784-8
BibTex
@article{BUT170319, author="Eva {Kuzielova} and Matúš {Žemlička} and Pavol {Hudec} and Jiří {Másilko} and Martin {Palou}", title="Influence of hydrothermal treatment parameters on the phase composition of zeolites", journal="Journal of Thermal Analysis and Calorimetry", year="2020", volume="142", number="1", pages="37--50", doi="10.1007/s10973-020-09784-8", issn="1588-2926", url="https://link.springer.com/article/10.1007%2Fs10973-020-09784-8" }