Differential isoconversional kinetic approach for accelerating rate calorimetry

In accelerating rate calorimetry (ARC) kinetic computation, the model-fitting methods based on a single experiment are dominant. However, the credibility of the kinetic results from a single calorimetric experiment is still suspicious according to the ICTAC recommendations. To overcome this issue, the feasibility of using the differential isoconversional method to process accelerating rate calorimetric data is investigated in this article. Through several experiments in the heat-wait-search mode under different thermal inertia factors, different reaction progress occurs. Then, by transferring the screened temperatures to the extent of conversions, the activation energy and ln[f(α)Aα] are determined from the slope and intercept of the linear fitting between ln(dα/dt)_α,i and 1/T_α,i. For effective verification, numerical simulations and experiments are carried out based on the nth-order and autocatalytic reactive chemicals. The research in this article shows that the differential isoconversional method is a potential alternative selection in ARC-based kinetic computation.