Thermal kinetic TG-analysis of metal oxalate complexes

The TG/DSC curves of K3[Cr(C2O4)3]·3H2O, K3[Al(C2O4)3]·3H2O, K3[Fe(C2O4)3]·3H2O and K2[Cu(C2O4)2]·2H2O in nitrogen were determined at the heating rate of 15, 10, 5, and 2 °C min−1, respectively. A non-linear optimization was applied for different reaction models to perform single and overall steps optimizations. Kinetic parameters were given, and the most probable mechanism functions were suggested.