Influence of hydrothermal treatment parameters on the phase composition of zeolites

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F20%3APU140028" target="_blank" >RIV/00216305:26310/20:PU140028 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1007%2Fs10973-020-09784-8" target="_blank" >https://link.springer.com/article/10.1007%2Fs10973-020-09784-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10973-020-09784-8" target="_blank" >10.1007/s10973-020-09784-8</a>

Result language

angličtina

Original language name

Influence of hydrothermal treatment parameters on the phase composition of zeolites

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10406 - Analytical chemistry

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Thermal Analysis and Calorimetry

ISSN

1388-6150

e-ISSN

1588-2926

Volume of the periodical

142

Issue of the periodical within the volume

1

Country of publishing house

HU - HUNGARY

Number of pages

14

Pages from-to

37-50

UT code for WoS article

000533060400014

EID of the result in the Scopus database

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