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A new method of the multiple rates isotemperature is proposed to define the most probable mechanism g(α) of thermal analysis; the iterative isoconversional procedure has been employed to estimate apparent activation energy E; the pre-exponential factor A is obtained on the basis of E and g(α). By this new method, the thermal analysis kinetics triplet of dehydration of cobalt oxalate dihydrate is determined, apparent activation energy E is 99.84 kJ5mol -1; pre-exponential factor A is 3.427×10 9-3.872×10 9 s -1 and the most probable mechanism belongs to nucleation and growth, A m model, the range of m is from 1.50 to 1.70.
A new method of the multiple rates isotemperature is proposed to define the most probable mechanism g (α) of thermal analysis; the iterative isoconversional procedure has been employed to estimate apparent activation energy E; the pre-exponential factor A is obtained on the basis of E and g (α). By this new method, the thermal analysis kinetics triplet of dehydration of cobalt oxalate dihydrate is determined, apparent activation energy E is 99.84 kJ 5 mol -1; pre-exponential factor A is 3.427 × 10 9- 3.872 × 10 9 s -1 and the most probable mechanism belongs to nucleation and growth, A m model, the range of m is from 1.50 to 1.70.