The influence of grain size on decomposition reaction of limestone in dispersing state

Abstract

The thermal behavior and kinetic parameters of decomposition reaction of limestone in a temperature-programmed mode were investigated by means of TG. The experimental results show that the kinetic model functions in different forms for the thermal decomposition reactions of different limestone grain sizes in dispersing state under the atmosphere of static air are 4(1−α)^3/4 for small size limestone and (1−α) for large size limestone. Information was obtained on the relationship among the decomposition temperature, decomposition time, decomposition fraction, decomposition reaction rate constant and grain size of limestone.

Keywords

dispersity / kinetics / CaCO₃ / TG / thermal decomposition

References

[1] Vosteen B. Vorwarmung and Vollkommene Caalcinations Von Zementrohmehl in Einem Schwebegassystem. Zemen-Kalk-Gips, 1974, 9: 443-443.

[2] Müller A, Dabm B, Stark J, der Kinetik Zur. Calciumcarbonatzerstetzung. Muller A, Dabm B, J Stork. Silikattechnik, 1977, 28: 4-4.

[3] Müller A, Dabm B, Weimar J S. Contribution to the Kinetics of Calcium Carbonate Dissociation. Zement-Kalk-Gips, 1979, 2: 78-78.

[4] Hu R Z, Shi Q Z. Thermal Analysis Kinetics, 2001 Beijing: Science Press.

[5] Hu R Z, Yang Z, Liang Y J. The Determination of the Most Probable Mechanism Function and Three Kinetic Parameters of Exothermic Decomposition Reaction of Energetic Materials by a Single Non-isothermal DSC Curre.Thermochim. Acta, 1998: 123–135