Based on the results, we suggested the following LHHW expression for describing the rate of RWGS reaction: which is a composition of the models suggested in works. Thus, the KCNODE model was useful as an intermediate model to identify a suitable rate equation for the RWGS reaction. In a similar way, the KCNODE model can be used to develop and test other rate equations that may then be based on fundamental principles. Applying this procedure for other parameters (like 𝑟 𝐹𝑇 , 𝛼, etc.) as well as the analysis of the catalyst activation/deactivation of CO2-FTS was out of scope for the current investigation but would be great of interest. It worth mentioning that the suggested approach can be easily expanded and applied in the kinetic modelling of continuous stirred-tank reactor.