Application of PTFE composite catalytic filter material in synergistic purification of multiple pollutants in waste incineration flue gas

The effective management of pollutants in waste incineration flue gas remains a critical challenge in environmental protection. This study develops a novel vanadium (V), molybdenum (Mo)/cerium (Ce), titanium (Ti)-polytetrafluoroethylene (VMo/CeTi-PTFE) composite catalytic filtration material to address the simultaneous removal of multiple pollutants in waste incineration flue gas purification. A systematic investigation of its performance and reaction mechanisms reveals that the coating process optimizes the pore structure of the filtration material. While the specific surface area is slightly reduced, the increased pore volume and diameter facilitate gas diffusion and enhance reaction efficiency. Experimental results demonstrate that under high catalyst loading conditions, this material exhibits outstanding performance in denitrification, dioxin degradation, and particulate removal, maintaining a consistently high dust removal efficiency of over 99.97%. Additionally, a high binder content enhances mechanical stability, while water and sulfur resistance tests confirm its exceptional durability. Mechanistic analysis indicates a significant synergistic effect between the denitrification reaction and dioxin degradation. Specifically, surface - OH groups promote the cleavage of C-Cl bonds, enabling efficient dioxin degradation while simultaneously improving nitrogen oxide (NO_x) reduction efficiency and suppressing the formation of the byproduct nitrous oxide (N₂O). This study provides a solid theoretical foundation and technical support for the design of multifunctional flue gas purification materials and underscores their broad application potential in managing complex pollutants. The findings have important implications for enhancing the efficiency and environmental benefits of waste incineration flue gas purification, representing a significant step toward more cost-effective, efficient, and environmentally friendly flue gas treatment solutions.