Catalytic decomposition of N2O over noble and transition metal containing oxides and zeolites. Role of some variables on reactivity

Synergy between metals in bimetallic zeolite supported catalyst for NO-promoted N2O decomposition

“…Rhodium and cobalt supported by zeolite are both very active for N 2 O decomposition in the absence of NO [19,20,23]. Figure 1 shows N 2 O decomposition over CoMOR, RhMOR and CoRhMOR.…”

“…Noble metal catalysts have a higher intrinsic activity for N 2 O decomposition in comparison to iron [19]. Unfortunately, N 2 O decomposition reaction over noble metal catalysts is inhibited by NO, O 2 and H 2 O [19,20]. This disfavours their use in the tail gas of nitric acid factories.…”

Effect of noble metals in the decomposition of nitrous oxide over Fe-ferrierites

“…In contrast, the reactivity decreases in the presence of moisture [10] and thus the decomposition must proceed above 400°C. Noble metals alone [11][12][13][14] or supported [15][16][17][18] are also known to efficiently decompose nitrous oxide, but the reaction is inhibited by nitric oxide, oxygen and water [15,18]. Pieterse et al [10] successfully reduced this drawback using bimetallic zeolite -Fe/Co-mordenite and Fe/Ru-ferrierite.…”

Dense ceramic oxygen permeable membranes and catalytic membrane reactors

“…Considering the efforts, it seems to be more promising to control the emissions of NO and N 2 O through the direct catalytic decomposition. Some perovskite oxides [210,211], Cu-ZSM-5 zeolites [212], metal-doped Co 3 O 4 [213] and Pd/Al 2 O 3 [214] have been applied in the direct decomposition of N x O as the catalysts. In all the catalysts mentioned above, the perovskite oxides exhibit their superiorities in the excellent long-term stability, as well as the good activities at high temperatures.…”