CALCULATION OF KINETIC-PARAMETERS FROM DTA CURVES USING THE CHARACTERISTIC TEMPERATURE

Kinetic parameter equations were derived for estimating a general nth-order decomposition reaction from a single DTA curve. These categories, for n < 1, n = 1, and n not equal 1, were derived. Three kinetic parameters, the activation energy E, reaction order n, and pre-exponential factor A, can be expressed as functions of the characteristic temperatures T-0, T-il, T-m, and T-e which are the decomposition starting point, first inflection point, peak maximum point and end point on the DTA curve, respectively. All of the kinetic parameter calculations are straightforward without any iteration.