Influence of ferric oxide modification on the properties of copper oxide supported on γ-alumina

Highly dispersed Fe3+-Al2O3 for the Fenton-like oxidation of phenol in a continuous up-flow fixed bed reactor. Enhancing catalyst stability through operating conditions

“…and/or θ-phases, in agreement with similar findings on boehmite-derived γ-Al2O3 reported by other authors [42,43]. Iron oxide phases were not detected neither the presence of mixed oxides due to the good dispersion of the active phase and the low total Fe content [44]. In order to obtain evidences about the Fe state, the diffractogram of the catalyst calcined at 1400 °C was performed (Fe1400).…”

Influence of CeO2modification on the properties of Fe2O3–Ti0.5Sn0.5O2catalyst for NO reduction by CO

“…Iron based catalyst has been found to be an excellent candidate for NO + CO reactions. It has been reported that Fe 2 O 3 , 8,10 Fe containing mixed oxides, 2,[8][9][10][11][12][13] Fe-exchanged materials, [14][15][16] and dispersed Fe based catalysts 17,18 exhibit remarkable NO + CO reaction activity. Earlier, 7 the catalytic activity of a metal oxide (10 wt%) supported on Al 2 O 3 and ZrO 2 for the NO + CO reactions decreases in the order Fe…”

Effect of Ag-doping of Nanosized FeAlO System on its Structural, Surface and Catalytic Properties

“…The second step is indicative to start the decomposition of aluminum hydroxide to aluminum oxyhydroxide compound Al(OOH) [32]. The last step corresponds to the complete decomposition of iron nitrate and aluminum oxyhydroxide into [14,24]. So, γ-Al 2 O 3 acted as a convenient support for hematite.…”

“…The changes in the specific surface areas of the prepared and calcined samples can be explained as follow: (a) the observed increase in the S BET value of hematite due to loading on γ-Al 2 O 3 support sample precalcined at 500˚C can be discussed in the light of fine dispersion Fe 2 O 3 particles on the surface of γ-Al 2 O 3 [14]. Indeed, XRD peaks due to iron oxide were not detected in the investigated samples in the present work indicating that the iron oxide phase exists in a highly divided or amorphous state in these specimens.…”

“…γ-Al 2 O 3 is one of the supports commonly used in the petroleum refining, petrochemical industries [9], the oxidation-reduction reactions [10] and catalytic oxidation of methane [11] owing to its high specific surface area, porous structure, high thermal stability, perfect mechanical strength and acidity [12]. The surface acidity of γ-Al 2 O 3 connected closely with the dispersion of the supported active metal oxides since the acid-base interaction between the metal oxides and the acid sites of γ-Al 2 O 3 support promoted the dispersion of the metal oxides, which was favorable for increasing the catalytic activity [13,14]. γ-Al 2 O 3 , copper oxide, and ferric oxide are known as important components in automotive exhaust emission control and industrial catalysts [15].…”