Mathematical modelling of thermal decomposition processes

G. Várhegyi, T. Székely

Research output: Contribution to journalArticle

2 Citations (Scopus)


Some possible elementary reactions are not included in the classical mathematical models of thermal decomposition. For example, we can assume that in the thermal decompositions of simple carbonates a proportion of the O2- ions produced on the reaction interface can migrate into the interior of the reactant phase, since at this temperature there is some probability of CO2 exchange between an O2- and a neighbouring CO32- ion. A similar diffusion-type process can be assumed in a wide class of decomposition reactions. The present state of computer science makes it possible to show by mathematical modelling how this migration influences the TG curves of the simplest contracting-sphere-type reactions. The resulting extended contracting-sphere model can provide the induction and the acceleration period of the TG curves.

Original languageEnglish
Pages (from-to)179-185
Number of pages7
JournalJournal of thermal analysis
Issue number2
Publication statusPublished - Oct 1 1977

ASJC Scopus subject areas

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

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