Conclusion

The proposed approach to elucidating a reaction mechanism and finding the most relevant rate equation (involving all known variables of the system) should provide solutions in most cases, provided that the kinetic data are reliable and consistent with the modeling assumptions. In particular, it is advisable to check that the thermodynamic variables of the solid-gas system under study are kept constant during all experiments. It should be remembered that the use of mathematical methods based on a series of temperature-ramping experiments calls for a high degree of caution when it comes to exploiting the results obtained. It is also advisable to carry out model hypothesis validation tests, which allow us to assess the degree of complexity of the solid-gas system under study, and to specify the domains of existence of the decisive step from which the velocity equations are derived....