Improvement of low-temperature catalytic activity over hierarchical Fe-Beta catalysts for selective catalytic reduction of NO with NH3

Low-temperature selective catalytic reduction of NOx with NH3 over an activated carbon-carbon nanotube composite material prepared by in situ method

“…As reported, the CNTs could supply strong acid sites, and CeO 2 supported on CNTs could signicantly increase the acidity of CNTs and in favor of the NH 3 -SCR reaction. 27 3.1.3 XPS. The binding energy and surface atomic composition of Ce/AC and Ce/AC-CNTs were estimated by XPS analysis.…”

“…As reported, the CNTs could supply strong acid sites, and CeO 2 supported on CNTs could significantly increase the acidity of CNTs and in favor of the NH 3 -SCR reaction. 27 …”

Simultaneous Selective Catalytic Reduction of NO and N2O by NH3 over Fe-Zeolite Catalysts

“…When NH 3 was adsorbed and saturated at 300 °C over Fe-beta catalysts, the bands at 3270−3280 cm −1 corresponded to the coordinated NH 3 on the Lewis acid sites. 30,43 The bands at 3362−3372 cm −1 were ascribed to NH 4 + ions on the Brønsted acid sites, 44,45 while the bands at 3661−3690 cm −1 were assigned to the OH group bonded to the extra-framework Al or Fe 3+ species. 46 Besides, the bands at 2212 and 2237 cm −1 were assigned to adsorbed N 2 O gas.…”

Promotion effect of urchin-like MnOx@PrOxhollow core–shell structure catalysts for the low-temperature selective catalytic reduction of NO with NH3

“…Many developments have been made on low-temperature NH 3 -SCR catalysts. Among the various catalyst systems, Cu-based, 5,6 Ce-based, 7 Febased, 8,9 Zr-based, 10 Mn-contained catalysts have stimulated great interest because of their oxidation-reduction properties, environmentally friendly features and excellent lowtemperature activities, however a disadvantage is easy deactivation in the presence of SO 2 in the exhaust gas.…”