Kinetic analysis of non-isothermal calcination TG curves of natural Turkish dolomites

Ayşegül Ersoy-Meriçboyu*, Sadriye Küçükbayrak

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Calcination kinetics of six dolomite samples originating from different parts of Turkey were investigated by using the non-isothermal thermogravimetry technique. Calcination TG curves of samples were obtained under two different atmospheres of (1) pure nitrogen and (2) a mixture consisting of 15 vol.% CO2 and 85 vol.% dry air, by using a constant heating rate of 10 K min-1. Kinetic analysis of the curves was achieved by applying four different methods of calculation; also, 14 different model equations of possible solid-state rate controlling mechanisms were considered. Arrhenius parameters E and A and the model function f(α) that best describes the reaction mechanism were evaluated for the decomposition reactions of both MgCO3 and CaCO3 components of samples. A computer program in basic which enables regression analysis to be carried out was used to obtain kinetic results from experimental non-isothermal TG data. It was observed that besides differences in the chemical composition of samples, gaseous atmosphere and the method of calculation influenced the results obtained.

Original languageEnglish
Pages (from-to)225-232
Number of pages8
JournalThermochimica Acta
Issue number2
Publication statusPublished - 7 Feb 1994


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