## 3 Results and Discussion  
### Catalytic Activity  
A pilot-scale study was conducted on a real residual gas stream, with its average composition and key parameters summarized in Table 1. The aim of the experiment was to evaluate the efficiency of N\({}_{2}\)O conversion on a catalyst in 410, 420, 430, and 440 \({}^{\circ}\)C as well as under different residual gas flow rates (ranging from 10 Nm\({}^{3}\)/h to 100 Nm\({}^{3}\)/h, with  
Figure 1: Two catalytic beds in the radial reactor. 10 Nm\({}^{3}\)/h intervals). The results are presented in Table 2. Initial results indicated stable and reproducible catalytic activity in the decomposition of N2O. Based on the findings from the laboratory-scale investigations, which indicated a significant influence of NOx concentration on the N2O conversion efficiency, a strategic decision was made to implement a dual-catalyst configuration within the reactor. Specifically, the deNOx catalyst was positioned in the outer ring of the reactor, while the de N2O catalyst was situated in the inner ring. This arrangement was designed to optimize the overall process efficiency. In this configuration, the deNOx catalyst in the outer section of the reactor effectively reduces the NOx concentration before the gas stream reaches the deN2O catalyst. Consequently, this allows for the optimal performance of the deN2O catalyst in  
\begin{table}
\begin{tabular}{c c c} \hline \hline
**Specification** & **Unit** & **Residual Gas** \\ \hline N2 & \% vol. & \textasci  
the inner section of the reactor, where the diminished NO\({}_{\text{x}}\) concentration enhances the N\({}_{2}\)O conversion rate. Experimental data further revealed that the N\({}_{2}\)O conversion efficiency increases with a rising reaction temperature. The highest conversion rate, exceeding 95%, was achieved at a temperature of 440 \({}^{\circ}\)C under a gas flow rate of less than 20 Nm\({}^{3}\)/h. This elevated conversion rate at 440 \({}^{\circ}\)C underscores the efficacy of the de\(\text{k}_{2}\)O catalyst under favorable thermal conditions, which is critical for industrial applications where precise temperature control can significantly enhance process efficiency. Conversely, as the gas flow rate increases, a decrease in N\({}_{2}\)O conversion efficiency is observed. Within the investigated temperature range, a conversion rate exceeding 60% was attained at flow rates below 30 Nm\({}^{3}\)/h. The reduction in conversion efficiency at higher flow rates is likely attributable to the reduced contact time between the gas stream and the catalyst surface, thereby limiting the extent of the chemical reaction. These findings underscore the necessity for precise regulation of key process parameters, such as temperature and flow rate, to maximize the performance of the de\(\text{k}_{2}\)O catalyst, which is essential for the optimization of N\({}_{2}\)O abatement in industrial processes. At a flow rate of 100 Nm\({}^{3}\)/h and an inlet temperature of 421.9 \({}^{\circ}\)C, an N\({}_{2}\)O conversion of 13.1% was achieved. Upon increasing the inlet temperature to 430.7 \({}^{\circ}\)C, the conversion rose to 21.9%, and at 439.6 \({}^{\circ}\)C conversion reached 33%. Subsequently, the flow rate of the residual gas was increased to 120 Nm\({}^{3}\)/h while maintaining an inlet temperature of approximately 440 \({}^{\circ}\)C. Based on previous studies, which indicated that conversion decreases as the flow rate increases, it was anticipated that at a flow rate of 120 Nm\({}^{3}\)/h, the conversion would be lower than that achieved at 100 Nm\({}^{3}\)/h at the same temperature. However, no conversion was observed at this flow rate. The initial interpretation of the results suggested that a flow rate of 120 Nm\({}^{3}\)/h might be too high, preventing the conversion of N\({}_{2}\)O. To verify this hypothesis, the flow rate was reduced to 100 Nm\({}^{3}\)/h at a temperature of 435.2 \({}^{\circ}\)C. Nevertheless, the previously achieved conversion under these conditions was not replicated.