Kinetics of the thermal dehydration of potassium titanium oxalate, KTiO(CO)·2HO

Muraleedharan, K.; Labeeb, P.
July 2012
Journal of Thermal Analysis & Calorimetry;Jul2012, Vol. 109 Issue 1, p89
Academic Journal
The thermal dehydration reaction of potassium titanium oxalate, KTiO(CO)·2HO, has been studied by means of thermogravimetry (TG), differential thermal analysis (DTA), and differential scanning calorimetry (DSC) in nitrogen atmosphere at different heating rates. KTiO(CO)·2HO dehydrates in a single step through a practically irreversible process. The activation energy involved and its dependence on the conversion degree were estimated by evaluating the thermogravimetric data according to model-free methods, and values of activation energy were determined for the dehydration reaction. Activation energy values were also evaluated from DSC data using isoconversional methods. The complexity of the dehydration of KTiO(CO)·2HO is illustrated by the dependence of E on the extent of conversion, α (0.05 ≤ α ≤ 0.95).


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