Environmental-friendly production of FeNbTi catalyst with significant enhancement in SCR activity and SO2 resistance for NOx removal

Design of High-Performance Iron–Niobium Composite Oxide Catalysts for NH3-SCR: Insights into the Interaction between Fe and Nb

“…More recently, doping with Nb was found to improve the catalytic activity and SO 2 resistance of an FeTi catalyst, which adjusted the structure of Fe 2 O 3 and led to the adsorption of more NH 3 as well as NO. 20 In our previous research, we added hexadecyl trimethyl ammonium bromide (CTAB) in the preparation process of Fe−M catalysts (M = Nb, Ti, Mo) to improve the SCR performance effectively, of which Fe−Nb catalysts exhibited high NO x conversion and N 2 selectivity. 21 Herein, a series of iron−niobium composite oxide catalysts was prepared with the assistance of CTAB in the preparation process, of which the FeNb 0.4 O x -C catalyst exhibited the highest NO x conversion.…”

“…In their research, Nb was partly doped into the Fe 2 O 3 lattice and existed in an amorphous phase as well as FeNbO 4 , thus improving the surface area, acidity, and reducibility. More recently, doping with Nb was found to improve the catalytic activity and SO 2 resistance of an FeTi catalyst, which adjusted the structure of Fe 2 O 3 and led to the adsorption of more NH 3 as well as NO . In our previous research, we added hexadecyl trimethyl ammonium bromide (CTAB) in the preparation process of Fe–M catalysts (M = Nb, Ti, Mo) to improve the SCR performance effectively, of which Fe–Nb catalysts exhibited high NO x conversion and N 2 selectivity .…”

Insight into the potential application of CuOx/CeO2 catalysts for NO removal by CO: a perspective from the morphology and crystal-plane of CeO2

“…The stretching vibration of the N 2 O species displays a weak band at 1670 cm À1 , and the linear monodentate nitrites present a strong vibration band at 1435 and 1480 cm À1 . 49,50,52,53,55 Compared with the single absorption spectra of CO and NO, the intensity and position of Cu + -CO species do not change significantly, while the peak intensity and position of NO and CO in other locations change significantly, suggesting that there is a strong competitive relationship between NO and CO. In addition, it can also be seen that the adsorption peaks of CO species are weakened or even disappeared except for the strong adsorption peaks at 1576 cm À1 , while the peak intensity of adsorbed nitrate or nitrite changes little.…”

Enhancing low‐temperature SCR deNOx MnCe catalyst based on rice husk char by KOH and H3PO4 activation

“…The O1s spectra can be divided into three distinct characteristic peaks: (i) the peaks at around 529.6-530.1 eV belong to surface lattice oxygen (marked as O ⊍ ), (ii) the peaks at around 530.0-532.0 eV belong to chemisorbed oxygen species (marked as O ⊎ ), and (iii) the peaks higher than 532.0 eV belong to absorbed oxygen in a small amount of water (marked as O γ ). 14,[57][58][59] The relative contents of O ⊍ , O ⊎ , and O γ are summarized in Table 3. The percentage of O ⊍ species is the highest in these three catalysts, while the percentage of O γ species is essentially the same in these three catalysts.…”