Studies on isothermal kinetics of some reactions of aluminum oxides and hydroxides

J. Madarász, G. Pokol, C. Novák, F. Tamarit Cobos, S. Gál

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Thermal decomposition and hydrothermal reactions of aluminum oxides and hydroxides were studied. The starting material was gibbsite pretreated by grinding in different ways. Sixteen kinetic models were fitted and the rate constants were estimated at different temperatures. Mechanical activation of the starting gibbsite had an effect on the reactivity of samples in several subsequent reactions. A new quantity, the relative residual variance is defined for comparison of different linearized models, and it is proposed as a criterion of fit. This was applied in making statistics in order to find the well-fitting models.

Original languageEnglish
Pages (from-to)445-454
Number of pages10
JournalJournal of thermal analysis
Volume38
Issue number3
DOIs
Publication statusPublished - Mar 1 1992

Keywords

  • aluminum oxides
  • hydrothermal reactions
  • hydroxides
  • isothermal kinetics

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Engineering(all)

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