The process of producing diethyl oxalate and oxalic acid by CO coupling reaction in gaseous phase was one of the most important projects of C1 chemical technology, due to its technical predominance. Based on the results from the experiments, it was necessary to study the nonlinear properties of the reaction system in the context of industrial process scale-up, control and optimization. Unluckily, no report related to nonlinear behavior analysis for the system presented up to now. In the thesis, the analysis...