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DSC kinetics of the thermal decomposition of copper(II) oxalate by isoconversional and maximum rate (peak) methods

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Abstract

The copper(II) oxalate was synthesized, characterized using FT-IR and scanning electron microscopy and its non-isothermal decomposition was studied by differential scanning calorimetric at different heating rates. The kinetics of the thermal decomposition was investigated using different isoconversional and maximum rate (peak) methods viz. Kissinger–Akahira–Sunose (KAS), Tang, Starink1.95, Starink1.92, Flynn–Wall–Ozawa (FWO) and Bosewell. The activation energy values obtained from isoconversional methods of FWO and Bosewell are 0.9 and 3.0 %, respectively, higher than that obtained from other methods. The variation of activation energy, E α with conversion function, α, established using these different methods were found to be similar. Compared to the FWO method, the KAS method offers a significant improvement in the accuracy of the E a values. All but the Bosewell maximum rate (peak) methods yielded consistent values of E α (~137 kJ mol−1); however, the complexity of the thermal decomposition reaction can be identified only through isoconversional methods.

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  1. Department of Chemistry, University of Calicut, Malappuram, 673635, Kerala, India

    K. Muraleedharan & S. Kripa

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Muraleedharan, K., Kripa, S. DSC kinetics of the thermal decomposition of copper(II) oxalate by isoconversional and maximum rate (peak) methods. J Therm Anal Calorim 115, 1969–1978 (2014). https://doi.org/10.1007/s10973-013-3366-y

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