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

作者：Muraleedharan K^*; Kripa S

来源：Journal of Thermal Analysis and Calorimetry, 2014, 115(2): 1969-1978.

DOI：10.1007/s10973-013-3366-y

• Decomposition kinetics
• Isoconversional methods
• Non-isothermal DSC
• Synthesis of Cu(II) oxalate

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, Starink(1.95), Starink(1.92), 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 (alpha) with conversion function, alpha, 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 (alpha) (similar to 137 kJ mol(-1)); however, the complexity of the thermal decomposition reaction can be identified only through isoconversional methods.

• 出版日期2014-2