NO_xreduction by CO over ASC catalysts in a simulated rotary reactor: effect of CO₂, H₂O and SO₂

Abstract

The influence of CO2, H2O and SO2 on the NO reduction by CO over Fe/Co activated semi-coke catalyst was investigated in a simulated rotary reactor.

Effects of the Incorporation of Distinct Cations in Titanate Nanotubes on the Catalytic Activity in NOx Conversion

“…Supported transition metal catalysts, particularly those possessing dispersed active sites on titania, alumina, silica, ceria, molybdena, zirconia, molecular sieves, zeolites and lantana have long been used as catalysts for the CO-SCR reaction [ 6 , 13 , 14 , 15 , 16 ] (and references herewith). However, the use of these catalysts in the presence of SO 2 and water vapor poisons, especially in low-temperature regimes, results in a considerable loss of activity and deactivation of catalysts, besides the complicated poisoning of the active sites by SO 2 to form transition stable and inert metal sulphates on the surface of the catalysts [ 8 , 14 , 15 , 16 , 17 , 18 , 19 ].…”

Stability challenges and prospects for the industrial application of non‐noble catalysts for selective catalytic reduction of NOx by CO (CO‐SCR)

“…By optimizing the reaction environment in this manner, it may be possible to mitigate the adverse effects of O 2 on CO-SCR activity, thereby enhancing the overall performance and efficiency of the system. [77] For instance, Cheng et al engineered a specialized rotary reactor to achieve the catalytic reduction of NO by CO under high O 2 conditions. As illustrated in Figure 14a, the reactor is bifurcated into two distinct zones: an adsorption zone and a reduction zone, delineated based on the composition of the incoming gases.…”

“…This could involve creating reaction zones with different O 2 and CO concentrations, or utilizing a staged approach where O 2 is selectively introduced or removed at various stages of the reaction. By optimizing the reaction environment in this manner, it may be possible to mitigate the adverse effects of O 2 on CO‐SCR activity, thereby enhancing the overall performance and efficiency of the system [77] . For instance, Cheng et al .…”

Radical-dominated reaction of CO–NO on a CaFe2O4 surface in sintering flue gas recirculation

“…32 The bands near 1489 cm À1 were related to monodentate nitrate 33 and the peaks at 1340 cm À1 were associated with the nitrocompound. 11,34 As the adsorption time increases, chelated double ligand nitrate and bridging nitrates rst appear, followed by monodentate nitrates and nitrocompound, indicating that NO can continue to adsorb on the catalyst surface. Based on the gas adsorption results observed in in situ DRIFTS, it could be inferred that CO may participate in the reaction in a gaseous state, that is, the reaction may accord with the Eley-Rideal reaction mechanism.…”