Model-dependent Method for Non-isothermal Experiments

Experimental data obtained from TG is generally deconvolved to calculate kinetic parameters by either model-independent or model-dependent method. The extent of conversion, a, is extracted from TG data using the following equation. 

Arrhenius equation expresses the explicit temperature dependence of the rate constant [40]. For a reaction conducted under linear heating program (heating rate, P = dT/df), the temperature T at any time can be given ns T = T + pt, where T is the initial temperature, the rate equation can be written as  

Correct reaction mechanism is determined by plotting In [g(a)/ P] vs reciprocal temperature using various g(a) functions as described in the literature [48]. The plot that gives the best fit with lowest standard deviation and high correlation coefficient is taken as the correct reaction mechanism. The values of slope and gas constant, R, give and the A can be obtained from the intercept. 

The area xmder the peak is determined by summing up the partial pressure/ 

Model-dependent method for isothermal experiment Experiments carried out under isothermal conditions are considered to be more reliable than those conducted under non-isothermal conditions because one of the parameters (T) is held constant during each experiment, thereby reducing the number of kinetic parameters that are determined simultaneously by fitting. Methodology adopted for deriving kinetic 

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