Publication detail

Influence of hydrothermal treatment parameters on the phase composition of zeolites

KUZIELOVA, E. ŽEMLIČKA, M. HUDEC, P. MÁSILKO, J. PALOU, M.

Original Title

Influence of hydrothermal treatment parameters on the phase composition of zeolites

Type

journal article in Web of Science

Language

English

Original Abstract

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.

Keywords

Metakaolin; Analcime; Hydrothermal curing; Thermal stability of zeolites

Authors

KUZIELOVA, E.; ŽEMLIČKA, M.; HUDEC, P.; MÁSILKO, J.; PALOU, M.

Released

1. 10. 2020

Publisher

SPRINGER

Location

DORDRECHT

ISBN

1588-2926

Periodical

Journal of Thermal Analysis and Calorimetry

Year of study

142

Number

1

State

Hungary

Pages from

37

Pages to

50

Pages count

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"
}