To Örebro University

Developing a honeycomb catalyst that enables the simultaneous removal of nitrogen oxides and polychlorinated dibenzodioxins/dibenzofurans (PCDD/Fs) below 200 degrees C is crucial for enhancing energy efficiency and advancing flue gas purification in municipal solid waste incineration (MSWI) plants. In this study, the removal efficiencies of a newly developed VOx-CeOx-WOx/TiO2(VWCe, 4.00 wt% V2O5, 2.84 wt% WO3, and 2.77 wt% CeO2, supported on TiO2) catalyst were evaluated through a series of pilot-scale experiments. The VWCe catalyst demonstrated excellent performance, achieving RENOx of 78 %-89 % and REPCDD/Fs of 88 %-96 % in the temperature range of 140-180 degrees C. Multiple characterization techniques revealed that the catalyst exhibited a typical mesoporous structure, enhanced redox properties, attributed to a high proportion of Ce3 + (65.9 %), abundant surface-active species, increased oxygen vacancies, and active lattice oxygen. Density functional theory (DFT) calculations and in-situ diffuse reflectance Fourier transform infrared spectroscopy (DRIFTs) analyses confirmed that CeOx and WOx significantly enhanced the catalyst's acidity, particularly the Br & Oslash;nsted acid sites, which improved its denitrification performance. This study highlights the potential for further improvement of SCR catalysts to achieve efficient simultaneous removal of NOx and PCDD/Fs under low-temperature conditions in real flue gas applications.