Detail publikačního výsledku
The non-isothermal kinetic analysis of the thermal decomposition of kaolinite by thermogravimetric analysis
PTÁČEK, P.; BRANDŠTETR, J.; KUBÁTOVÁ, D.; HAVLICA, J.; ŠOUKAL, F.; OPRAVIL, T.
Originální název
The non-isothermal kinetic analysis of the thermal decomposition of kaolinite by thermogravimetric analysis
Anglický název
The non-isothermal kinetic analysis of the thermal decomposition of kaolinite by thermogravimetric analysis
Druh
Článek recenzovaný mimo WoS a Scopus
Originální abstrakt
The dehydroxylation of the medium ordered kaolinite was investigated under non-isothermal conditions. Samples of industrially treated (washed) kaolin with high content of kaolinite were calcined using heating rate from 1 to 40 C min-1. The results of thermogravimetric analysis (TGA) were supplemented by differential thermal analysis (DTA), infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM) results. The mechanism and pertinent kinetic parameters, i.e. overall activation energy (EA) and pre-exponential (frequency) factor (A), were evaluated from the series of thermogravimetric experiments. The obtained results show that dehydroxylation of kaolinite is controlled by the rate of third-order reaction (F3) under applied condition. The median values of EA and A correspond to 227 +/- 1 kJ mol-1 and (9.4 +/- 0.3) x 10E9 s-1, respectively.
Anglický abstrakt
The dehydroxylation of the medium ordered kaolinite was investigated under non-isothermal conditions. Samples of industrially treated (washed) kaolin with high content of kaolinite were calcined using heating rate from 1 to 40 C min-1. The results of thermogravimetric analysis (TGA) were supplemented by differential thermal analysis (DTA), infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM) results. The mechanism and pertinent kinetic parameters, i.e. overall activation energy (EA) and pre-exponential (frequency) factor (A), were evaluated from the series of thermogravimetric experiments. The obtained results show that dehydroxylation of kaolinite is controlled by the rate of third-order reaction (F3) under applied condition. The median values of EA and A correspond to 227 +/- 1 kJ mol-1 and (9.4 +/- 0.3) x 10E9 s-1, respectively.
Klíčová slova
Metakaolinite; Kaolinite; Dehydroxylation; Non-isothermal kinetics; Activation energy; Thermogravimetric analysis
Klíčová slova v angličtině
Metakaolinite; Kaolinite; Dehydroxylation; Non-isothermal kinetics; Activation energy; Thermogravimetric analysis
Autoři
PTÁČEK, P.; BRANDŠTETR, J.; KUBÁTOVÁ, D.; HAVLICA, J.; ŠOUKAL, F.; OPRAVIL, T.
Rok RIV
2011
Vydáno
20.12.2010
Nakladatel
ELSEVIER
Místo
ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
ISSN
0032-5910
Periodikum
POWDER TECHNOLOGY
Svazek
204
Číslo
2-3
Stát
Švýcarská konfederace
Strany od
222
Strany do
227
Strany počet
6
BibTex
@article{BUT51018,
author="Petr {Ptáček} and Jiří {Brandštetr} and Dana {Kubátová} and Jaromír {Havlica} and František {Šoukal} and Tomáš {Opravil}",
title="The non-isothermal kinetic analysis of the thermal decomposition of kaolinite by thermogravimetric analysis",
journal="POWDER TECHNOLOGY",
year="2010",
volume="204",
number="2-3",
pages="222--227",
issn="0032-5910"
}