Influence of ignition atmosphere on the structural properties of magnetic iron oxides synthesized via solution combustion and the NH3-SCR activity of W/Fe2O3 catalyst

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

“…NbO x -C did not show a reduction peak over the whole temperature range, which was in agreement with previous research. ,, Taking this into account, all of the H 2 consumption appearing in Figure could be attributed to the reduction of Fe. According to previous research, ,,, the reduction of Fe 2 O 3 occurs in three steps: reduction from Fe 2 O 3 to Fe 3 O 4 , then from Fe 3 O 4 to FeO, and finally from FeO to Fe, with a H 2 consumption ratio of 1:2:6 for the three steps. , Based on this ratio, the H 2 -TPR profiles of all Fe-containing catalysts were fitted into several subpeaks, as shown in Figure . The peaks of the first step below 400 °C are identified in black.…”

The influence of H2O or/and O2 introduction during the low-temperature gas-phase sulfation of organic COS + CS2 on the conversion and deposition of sulfur-containing species in the sulfated CeO2-OS catalyst for NH3-SCR

“…The physical and chemical properties of catalysts were characterized by N 2 adsorption-desorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD), Raman spectroscopy (Raman), X-ray photoelectron spectroscopy (XPS), H 2 temperature programmed reduction (H 2 -TPR), NH 3 temperature programmed desorption (NH 3 -TPD) and thermogravimetric (TG) experiments. 32,37 The detailed test process is given in the ESI. †…”

Influence of nonmetallic elements doping on the NH3-SCR activity and properties of Ce20W10Ti100O catalyst via melamine modification

“…Meanwhile, there exists some unavoidable problems which restrict the practical applications of the commercial catalyst, including the narrow temperature range of 300⁓400 °C, the high conversion of SO2 to SO3 and the poison of vanadium pentoxide to human health and environment [6,7]. Accordingly, it is desirable to develop novel NH3-SCR catalyst to substitute the conventional V2O5-WO3(MoO3)/TiO2 catalyst [2,8,9].…”