TG study on the chlorination reactivities of aluminas of salt hydrate origin

I. S. Pap, Yu A. Lajner, I. Bertóti, G. Mink, T. Székely

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Alumina samples were produced by the thermal decomposition of hydrates of aluminium sulphate, nitrate and chloride. The kinetics of the chlorination were studied by means of isothermal TG measurements, using COCl2 as chlorinating agent. Apparent activation energies were determined in the temperature ranges where the reaction was controlled by chemical processes. The reaction rates related to unit surface area were similar for all the samples, and the isothermal TG curves could be described by the models of contracting cylinders and spheres. Below 700 K, however, the initial rates for samples prepared from AlCl3·6H2O were of an accelerating character, resembling an autocatalytic process. After this stage, the reaction rates stabilized at extremely high level as compared with the samples of other origins.

Original languageEnglish
Pages (from-to)567-573
Number of pages7
JournalJournal of Thermal Analysis
Volume33
Issue number3
DOIs
Publication statusPublished - Sep 1988

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chlorination
Aluminum Oxide
Chlorination
Hydrates
hydrates
Reaction rates
Alumina
reactivity
aluminum oxides
Salts
salts
Nitrates
Chlorides
reaction kinetics
Pyrolysis
Activation energy
Aluminum
Kinetics
thermal decomposition
nitrates

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Engineering(all)

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TG study on the chlorination reactivities of aluminas of salt hydrate origin. / Pap, I. S.; Lajner, Yu A.; Bertóti, I.; Mink, G.; Székely, T.

In: Journal of Thermal Analysis, Vol. 33, No. 3, 09.1988, p. 567-573.

Research output: Contribution to journalArticle

Pap, I. S. ; Lajner, Yu A. ; Bertóti, I. ; Mink, G. ; Székely, T. / TG study on the chlorination reactivities of aluminas of salt hydrate origin. In: Journal of Thermal Analysis. 1988 ; Vol. 33, No. 3. pp. 567-573.
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