Development of a software for determination of kinetic parameters in thermal analysis

Date

2011

Author

Ertunç, Göker

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In this thesis, a new software, THERA-Kinetics was developed for the evaluation of kinetic parameters using non-isothermal data. Different computational methods, available in the software, were applied to a set of experimental and simulated data distributed in the ICTAC (International Confederation for Thermal Analysis and Calorimetry) Kinetics Project. The reliability of the software was verified by comparing the kinetic results, which were in good agreement, with those obtained by the participants of the ICTAC Kinetics Project. It was also within the scope of this study to examine the combustion characteristics and kinetics of three same origin coal samples. A series of thermogravimetry (TG) and differential scanning calorimetry (DSC) measurements were carried out in non-isothermal conditions at heating rates of 5, 10 and 15 K/min. Reaction regions, peak and burn-out temperatures, weight loss percentages and heat of reactions of the samples were determined for each heating rate from TG and DSC curves. A variety of computational methods, available in the software developed, were applied to experimental data for the evaluation of the kinetic parameters of the coal samples. It was observed that there was no general trend in the activation energy values from the point of heating rate.

Subject Keywords

Thermal analysis, Thermogravimetry., Coal

URI

http://etd.lib.metu.edu.tr/upload/12613624/index.pdf
https://hdl.handle.net/11511/21271

Collections

Graduate School of Natural and Applied Sciences, Thesis