Description of mechanism function about dehydration of cobalt oxalate dihydrate by multiple rates isotemperature method

Abstract

A new method of the multiple rates isotemperature is proposed to define the most probable mechanismg(α) of thermal anlaysis; the iterative isoconversional procedure has been employed to estimate apparent activation energyE; the pre-exponential factorA is obtained on the basis ofE andg(α). By this new method, the thermal analysis kinetics triplet of dehydration of cobalt oxalate dihydrate is determined, apparent activation energyE is 99.84 kJ·mol−1; pre-exponential factorA is 3.427×109–3.872×109 s−1 and the most probable mechanism belongs to nucleation and growth,Am model, the range ofm is from 1.50 to 1.70.