Promotional effect of Ce in NH3-SCO and NH3-SCR reactions over Cu-Ce/SCR catalysts

A Comparative Mini-Review on Transition Metal Oxides Applied for the Selective Catalytic Ammonia Oxidation (NH3-SCO)

“…In the presence of O 2 , NH 3 O 2 + complex was formed, which further decomposes to NO (followed by NH 3 -SCR-DeNO x ) with the N 2 formation. Such an indirect route (i.e., i-SCR mechanism) was reported also over the V-based catalysts [53,54] (e.g., Figure 5b). Recently, Liu et al [56] identified based on the first-principle calculation method of DFT the adsorption sites of NH 3 on V 2 O 5 (001).…”

“…Furthermore, the commercial V 2 O 5 -WO 3 -TiO 2 catalyst was modified with Cu (1 wt.%) and Ce (1–10 wt.%) species. Overall, the catalyst with the composition of (1.02 wt.%)Cu-(4.79 wt.%)Ce/V 2 O 5 -WO 3 -TiO 2 showed enhanced activity at 300 °C, while its modification with Ce enhanced H 2 O and sulfur resistance [ 53 ]. The V 2 O 5 -WO 3 -TiO 2 catalyst modified with Cu or Fe (1.0 wt.%) ions revealed the highest activity and N 2 selectivity above 350 °C (among other materials modified with Mn or Co species) [ 54 ].…”

“…Reprinted from [ 55 ] with permission from ACS Publications; ( b ) schematic representation of the mechanism of NH 3 -SCO over Cu-Ce/V 2 O 5 -WO 3 -TiO 2 . Reprinted from [ 53 ] with permission from Elsevier.…”

Catalytic activity and mechanism of selective catalytic oxidation of ammonia by Ag–CeO2 under different preparation conditions

“…2b shows the influence of Ag loading on the N 2 selectivity of the catalyst. As Ag has a more vital oxidation capacity, 33 NH 3 is prone to excessive oxidation at high temperatures. Therefore, appropriate Ag loading can significantly improve NH 3 conversion and maintain good N 2 selectivity.…”

Catalytic oxidation of nitric oxide over modified carbide slag: Experimental and theoretical studies

“…At present, the common denitrification methods include the wet method (such as the liquid-phase absorption method) and the dry method (such as the catalytic oxidation and catalytic reduction methods). [6][7][8] The generation of secondary pollution (such as waste liquid) hinders the large-scale application of the wet process. Thus, the dry method has attracted more attention.…”