Detail publikace

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

Jazyk

en

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.

Dokumenty

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",
  annote="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.",
  address="ELSEVIER",
  chapter="51018",
  institution="ELSEVIER",
  journal="POWDER TECHNOLOGY",
  number="2-3",
  volume="204",
  year="2010",
  month="december",
  pages="222--227",
  publisher="ELSEVIER",
  type="journal article - other"
}