Kinetics and mechanism of the dehydration of ammonium oxalate monohydrate

Abstract The dehydration of (NH 4 ) 2 C 2 O 4 · H 2 O has been studied by isothermal and nonisothermal TG. From the non-isothermal experiments, the best-fitting rate law appears to be A1.5, A3, or D3. Data from isothermal experiments gave the best fit with an R2 rate law. A value of 73 kJ mol −1 was found for the activation energy, and the nature of the variation between runs was explored.