Reduction of Fe2O3 with hydrogen

Zieliński, Jerzy; Zglinicka, Ilona; Znak, Leszek; Kaszkur, Zbigniew

doi:10.1016/j.apcata.2010.04.003

Cited by 346 publications

(167 citation statements)

References 15 publications

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“…The second reduction peak is assigned to the reduction of magnetite phase to wustite FeO and the last hydrogen consumption peak with the maximum at about 700°C is attributed to the reduction of FeO to metallic iron. Many researchers [27][28][29] also studied iron catalysts by temperature programmed reduction technique and they also observed three reduction stages on the TPR-H 2 profile. They reported about the same reduction stages during the reduction process of hematite.…”

Section: Resultsmentioning

confidence: 99%

Fischer–Tropsch synthesis over various Fe/Al2O3–Cr2O3 catalysts

Mierczyński

Dawid

Maniukiewicz

et al. 2018

Reac Kinet Mech Cat

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Monometallic iron supported catalysts were prepared by the impregnation method and tested in Fischer-Tropsch (F-T) synthesis. The activity tests performed in the studied reaction showed that the composition of the catalyst strongly influences the reactivity of the catalytic systems in the F-T reaction. It was also found that the system which showed the highest content of iron species on the catalyst surface exhibited the highest yield in F-T reaction. In addition, the most active catalyst also showed high specific surface area, high total acidity value and the highest amount of iron species on the catalyst surface. The analysis of the liquid product of F-T synthesis confirmed the occurrence of aliphatic, branched and unsaturated linear hydrocarbons.

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Section: Resultsmentioning

confidence: 99%

Fischer–Tropsch synthesis over various Fe/Al2O3–Cr2O3 catalysts

Mierczyński

Dawid

Maniukiewicz

et al. 2018

Reac Kinet Mech Cat

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“…In addition, according to Ayub et al 38 and Ratkovic et al 39 , the reduction peaks at around 420, 550 and 800 °C can be assigned as the reduction ofFe2O3. A two-step reduction of Fe-oxide has been reported (Fe2O3->Fe3O4->Fe or Fe2O3->Fe3O4->FeO->Fe), which was depended on the composition and the weight of the sample, and the particle size of metal oxides 40 .…”

Section: Tpr Analysismentioning

confidence: 99%

Development of Fe-Promoted Ni–Al Catalysts for Hydrogen Production from Gasification of Wood Sawdust

Dong

Ling

et al. 2016

Energy Fuels

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ABSTRACT:The production of renewable hydrogen enriched gas from biomass waste is a promising technology for the development of a sustainable economy and society. Until now, there are still challenges of the technology in terms of the efficiency of hydrogen production. Catalyst is known and has been tested to enhance hydrogen production from biomass gasification. In particular using Ni-based catalysts, which have high reactivity for hydrogen production and are cost effective. However, developing a Ni-based catalyst with high thermal stability and resistance of coke deposition on the surface of the catalyst is still a challenging topic. In this work, Ni-Al catalysts doped with low-cost Fe metal were investigated for hydrogen enriched syngas production from gasification of biomass using a two-stage fixed bed reactor. NiOFe2O3-Al2O3 catalysts with various Ni:Fe molar ratios (9:1, 8:2, 6:4, 5:5, 4:6, 2:8 and 1:9) were studied aiming to understand the influence of Fe addition on the production of hydrogen and the catalyst stability in terms of coke deposition on surface. X-ray diffraction, temperature programme reduction and Transmission electron microscopy analysis of the fresh catalysts showed that nanoparticles (mainly NiAl2O4 spinel phase and Al2O3, ~5 nm) were identified in the catalysts. High dispersion of metal particles was obtained using a co-precipitation method of catalyst preparation. With the increase of Fe addition, hydrogen production was reduced from around 11 to 8 (mmol H2 g -1 biomass). However, the addition of Fe into the Ni-based catalyst significantly reduced the amount of coke deposited on the surface of the catalyst.H2/CO molar ratio was maximized to 1.28 when Ni:Fe molar ratio was 1:1. In addition, sintering of metal particles was not observed through the TEM analysis of the fresh and reacted catalysts.2

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“…The other broad peak (ε) with peak temperature of 520℃ is attributed to the reduction hydrogen consumption peak of the transition Fe 3 O 4 →(FeO)→Fe. It is also observed that there are three-step mechanism in TPR of pure Fe 2 O 3 [13], as the reduction peaks at 400℃, 500℃ and 655℃ could be assigned to the step reductions of …”

Section: Tpr Analysismentioning

confidence: 88%

The preparation and activity of Cu-Fe-Zr-Ce based catalysts for water gas shift

Wu¹,

Liu²,

Liu

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. CeO 2 -ZrO 2 composite oxide was synthesized with precipitation method as support and Cu a Fe b (ZrCe 4 ) 8 O x catalysts were prepared by impregnation; X-ray diffraction, H 2 temperature program reduction,and scanning electron microscope techniques were jointly used to characterize the crystal phases and reduction properties of catalysts. Then the activity of catalysts in water gas shift was studied, thus investigated how catalyst composition impacted the water gas shift. Conclusions drew from the results can be briefly stated. Cu a Fe b (ZrCe 4 ) 8 O x was provided with stable cubic crystalline framework and Cu and Fe, as the active components,was highly dispersed on the surface of supports in the form of CuO and Fe 2 O 3 respectively. The strong interactions between copper and iron component enhanced the reducing capacity of CuO and Fe 2 O 3 . Cu a Fe b (ZrCe 4 ) 8 O x catalysts exhibited high catalytic activity and selectivity while the main active components were Cu and Fe 3 O 4 . The CO conversion rate reached 96% when Cu 7 Fe 3 (ZrCe 4 ) 8 O x catalysts was used in water gas shift at 623K and the only products were H 2 and CO 2 . The activity was still desirable even the catalysts was applied at 723K.

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Reduction of Fe2O3 with hydrogen

Cited by 346 publications

References 15 publications

Fischer–Tropsch synthesis over various Fe/Al2O3–Cr2O3 catalysts

Fischer–Tropsch synthesis over various Fe/Al2O3–Cr2O3 catalysts

Development of Fe-Promoted Ni–Al Catalysts for Hydrogen Production from Gasification of Wood Sawdust

The preparation and activity of Cu-Fe-Zr-Ce based catalysts for water gas shift

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