Abstract
The oxidation kinetics of nano-aluminum in a carbon dioxide environment under non-isothermal conditions was studied using the thermogravimetric and differential thermogravinetic method at various heating rates. The methods for determining the kinetic parameters of the title reaction, such as Ozawa's peak method, Ozawa's isoconversional method and the Coats–Redfern method, are discussed. The most probable mechanisms for the two stages of the reaction were estimated by using linear-fit methods. The kinetic compensation effect was used to verify the accuracy of the identified mechanism. It was shown that the average values of activation energies obtained from Ozawa's isoconversional method differed minimally from those determined by the Coats–Redfern method. The models determined that the two stages of the reaction correspond to the reaction order (RO) model, where the reaction order was 1.4 for stage I and 2.6 for stage II.