Kinetic analyses using simultaneous TG/DSC measurements: Part II: Decomposition of calcium carbonate having different particle sizes

Autores: Sanders, J.P.|Gallagher, P.K.
Fuente: Journal of Thermal Analysis and Calorimetry
82(3), 659-664
2005

The thermal decomposition of CaCO3was studied using simultaneous TG/DSC for two different ranges of particle size from the same source and a physical mixture of each. The difference in kinetic behavior was as expected qualitatively, but significantly different quantitatively. In addition, the mixture did not behave as a simple combination of its end members. These discrepancies are attributed to the problems associated with mass and thermal transport. The TG data again proved easier to fit than the DSC data.