Journal
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
Volume 343, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2023.123482
Keywords
The synergistic elimination of CO and NO; O-2 recycle; Pd-3-CO adsorption; The MvK mechanism; The fast SCR
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The simultaneous elimination of CO and NO was achieved using CeNbTiOx catalyst and 0.3% Pd/CeNbTiOx catalyst, showing high removal efficiency and stability within the temperature range of 240-320 degrees C.
The simultaneous elimination of CO and NO has practical significance for the control of air pollutants in the flue gas operating temperature range of 240-320 degrees C. CeNbTiOx catalyst was prepared by evaporation-induced self-assembly method (EISA), and the 0.3 % Pd/CeNbTiOx catalyst was obtained by appropriate Pd anchoring at the defects of CeNbTiOx. CO and NO removal efficiency were above 90 % from 240 to 320 degrees C, which exhibited satisfactory N-2 selectivity. The CO and NO removal efficiency of the 0.3 % Pd/CeNbTiOx catalyst exceeded 92 % during stability and water resistance. O-alpha and O-beta were involved in the oxidation of NO and CO, respectively, promoting the fast SCR and CO oxidation reaction within the ordered mesoporous of the 0.3 % Pd/CeNbTiOx catalyst. In addition, the efficiency of CO and NO elimination had been further improved due to the enhancement of defects after resistance of H2O. Therefore, this work provided a new and efficient way to control CO and NO by the efficient using of oxygen species.
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