A comparative study of the role of the support on the behaviour of iron based ammonia SCR catalysts

Rod‐Shaped Fe2O3 as an Efficient Catalyst for the Selective Reduction of Nitrogen Oxide by Ammonia

“…[5,6] TEM analyses of the catalyst after the stability test confirm that both the morphology and the exposed facets are almost the same as the fresh one (Figure 3 c). Electron energy-loss spectroscopy (EELS) reaffirmed that the oxidation state of iron and the coordination of oxygen in the catalyst keep unchanged before and after the reaction (Table S1 in the Supporting Information), indicating the stable surface coordination environment.…”

“…This mature system displays adequate activity typically at 300-400 8C, but it is still not satisfactory with respect to the volatility and toxicity of VO x and the easy deactivation. [1][2][3] Attracted by the inherently environmentally benign character and the prominent thermal stability, ferric oxides have long been explored to catalyze selective reduction of NO x with ammonia, [3][4][5][6][7][8] but no significant progress has been achieved so far. Ferric oxides commonly suffer from the insufficient activity at low temperatures and the severe deactivation induced by H 2 O and SO 2 that are permanently and abundantly present in the exhaust.…”

Catalytic oxidation of trichloroethylene over Fe-ZSM-5: Influence of the preparation method on the iron species and the catalytic behavior

“…Moreover, no peak indicating the presence of iron was observed. This absence of signal may be due to several factors such as the metal loading in the zeolite was low or their dispersion was high [27,28]. It is also possible that the diffraction peaks of ␣-Fe 2 O 3 at 33 and 36 • [29] are overlapped by the peaks of H-ZSM-5 at 32.87 and 36.15 • [30].…”

Influence of calcination temperature on iron titanate catalyst for the selective catalytic reduction of NOx with NH3

“…6B, after NO x adsorption and N 2 purge, the catalyst surface was mainly covered by monodentate nitrate (1497-1552 cm −1 and 1282 cm −1 ), bridging nitrate (1616 and 1234 cm −1 ) and bidentate nitrate (1581 cm −1 ), and the hydroxyl consumption bands at 3724 and 3689 cm −1 due to the interaction between surface basic hydroxyls and NO x also showed up [41][42][43][44][45]. With the increasing of calcination temperature, the total adsorption amount of the three kinds of nitrate species showed obvious decrease, which is in well accordance with the NO x -TPD results.…”