Sample controlled thermal analysis and high resolution thermogravimetry. Influence of experimental conditions on calculated kinetic parameters
Sample Controlled Thermal Analysis and High-resolution Thermogravimetry are used for to study the dehydration of BaCl2·2H2O. Model controlled by 2-dimensional interfacial advancement (R2) and activation energy of 26 kJ/mol were calculated when the technique SCTA was applied and a 3-dimensional diffusive kinetic model (D3) and activation energy of 40 kJ/mol were determined when Hi- Res ATG was applied. The influence of atmosphere and particularly of the residual pressure in environment of the samples on the calculated kinetic parameters was demonstrated.
Keywords: Kinetics, CRTA, Hi Res ATG, BaCl2·2H2O.
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