Abstract
The choice of possible kinetic models for a solid state reaction should involve multi-parameters to reduce down specious models which are suggested by using single parameters. For this purpose, in the present work the activation energy estimated from the isoconversional plot was used to check models proposed by the degree of conversion at the maximum reaction rate for the thermal decomposition of calcium oxalate monohydrate. It was found that the basic D2 and D4 models are not a likely description of the kinetics of a three step decomposition. The R n model was also applied.
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