Detail publikace

Influence of hydrothermal treatment parameters on the phase composition of zeolites

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"
}