EJMP&EP





Kinetic study of the thermal decomposition
of calcium carbonate by isothermal
methods of analysis

I. Halikia*, L. Zoumpoulakis, E. Christodoulou and D. Prattis

National Technical University of Athens (NTUA), Department of Mining and Metallurgical Engineering, Section of Metallurgy and Materials Technology, Laboratory of Metallurgy, 9 Heroon Polytechniou Str., Zografou Campus, 15780 Athens, Greece

Received 12 June 2001; accepted 15 November 2001



ABSTRACT

In the present study, isothermal methods of kinetic analysis are used to investigate the kinetics of the thermal decomposition of calcium carbonate. Thermogravimetric analyzer experiments were carried out in standard temperature values. In order to determine the decomposition mechanism and the conversion function form that governs it, four different methods of isothermal kinetic analysis were used. The kinetic model that was found to better fit the experimental results was that of phase boundary controlled reaction. The activation energy was evaluated from the Arrhenius plots, as well as by applying an alternative method, and the results confirmed the predominance of the chemical mechanism.


Keywords: calcium carbonate; thermal decomposition; isothermal methods; kinetic analysis; decarbonisation



* Corresponding author
  E-mail : halikia@metal.ntua.gr