Mathematical modelling of thermal decomposition processes

G. Várhegyi, T. Székely

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

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
Volume12
Issue number2
DOIs
Publication statusPublished - Oct 1 1977

ASJC Scopus subject areas

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

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