The pilot test is an important procedure that ultimately leads to implementation of an optimized catalytic process. A global reaction rate was calculated from the intrinsic kinetic rate with the effectiveness factor, and the calculated value is fitted well with the experimental data, which indicates that the global reaction rate is reliable. Further, a scale-up HCl oxidation experiment has been carried out in a single-tube reactor with an inner diameter of 22 mm using shaped CeO2 CuO/Y as the catalyst. A one-dimensional fixed-bed model based on the global reaction rate was adopted to properly describe the reaction behavior in the single-tube reactor. The results have laid a valuable foundation for the industrial reactor designation and the process optimization of HCl oxidation.