Publication detail

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.

Original Title

Type

journal article - other

Language

English

Original Abstract

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.

Keywords

Metakaolinite; Kaolinite; Dehydroxylation; Non-isothermal kinetics; Activation energy; Thermogravimetric analysis

Authors

PTÁČEK, P.; BRANDŠTETR, J.; KUBÁTOVÁ, D.; HAVLICA, J.; ŠOUKAL, F.; OPRAVIL, T.

RIV year

2010

Released

20. 12. 2010

Publisher

ELSEVIER

Location

ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND

ISBN

0032-5910

Periodical

POWDER TECHNOLOGY

Year of study

204

Number

2-3

State

Swiss Confederation

Pages from

222

Pages to

227

Pages count

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"
}