Hydrocarbon production via Fischer–Tropsch synthesis from H2-poor syngas over different Fe-Co/γ-Al2O3 bimetallic catalysts

Lögdberg, Sara; Tristantini, Dewi; Borg, Øyvind; Ilver, L.; Gevert, Börje Sten; Järås, Sven; Blekkan, Edd A.; Holmén, Anders

doi:10.1016/j.apcatb.2008.11.037

Cited by 117 publications

(70 citation statements)

References 47 publications

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“…TPO studies of these catalysts showed an increase in the reduction level with 38 Mossbauer studies conducted on CoFe/SiO 2 catalysts also suggested the formation of alloy particles. 63 However, another study on silica-supported bimetallic calcined samples showed separate Co 3 O 4 and Fe 2 O 3 phases, with no cobalt-iron mixed oxides.…”

Section: Factors Leading To the Lack Of A Consistent Structure-activimentioning

confidence: 99%

“…38 This was accomplished without increasing the WGS activity, and is therefore thought to be due to a higher F-T activity of the CoFe mixtures compared to monometallic Co. Conversely, alloying iron with small amounts of Co increased the relative WGS activity and lowered the F-T activity compared to monometallic Fe. The bimetallic catalysts showed essentially no synergy effects with respect to hydrocarbon selectivities and olefin/paraffin ratios.…”

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confidence: 99%

“…38 Still, this would present no advantage in real F-T conditions, since the bimetallic catalysts suffer from a severe temporary deactivation with respect to both WGS and F-T activity upon exposure to the water pressures prevailing at sufficiently high conversion levels.…”

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confidence: 99%

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Bimetallic catalysts for the Fischer–Tropsch reaction

et al. 2011

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This short critical review summarises and analyses the developments in Fischer-Tropsch catalysis using bimetallic alloys. We introduce a simple notation for such catalysts, and monitor the reports of synergistic effects and composition/performance relationships. Special attention is given to CoFe alloys on a variety of supports, and to the effects of catalyst preparation methods and pre-treatment conditions. The key drawbacks in comparing the large amount of data available on Fischer-Tropsch catalysis are the high dimensionality of the problem and the lack of long time-on-stream studies. Based on the new understanding coming from characterisation studies of supported bimetallic particles, we propose a structured approach for effectively studying Fischer-Tropsch catalysis.

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Section: Factors Leading To the Lack Of A Consistent Structure-activimentioning

confidence: 99%

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confidence: 99%

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Bimetallic catalysts for the Fischer–Tropsch reaction

et al. 2011

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“…However, the process uses a lot of energy and is in need of the development of more active catalytic materials and efficient engineering solutions. Gasified biomass normally has a H 2 /CO ratio below 1 [65]. This means that more hydrogen has to be added to be able to run the FT synthesis, which requires a value exceeding 2 [66].…”

Section: Opportunities: Selected Examplesmentioning

confidence: 98%

Upgrading of Raw Gas from Biomass and Waste Gasification: Challenges and Opportunities

et al. 2011

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The depletion of fossil fuel-based resources and concerns for increasing emissions of CO 2 call for new ways of producing environmentally-friendly substitutes for motor fuels and chemicals. Thermo-chemical conversion of biomass and waste using gasification is a strong candidate to meet these challenges. For efficient and cost-effective application of this technique, novel solutions for hot gas cleaning are needed. This review highlights some important areas for improvement of upgrading technologies for pressurised fluidised bed gasification systems using biomass as a fuel.

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“…During these two reduction peaks Co +3 and Co +2 oxide species are reduced to metallic cobalt. The iron oxidic phases (Fe2O3-and Fe3O4) are reduced metallic iron according to the following steps [33,34]: 3Fe2O3+ H2 → 2Fe3O4 + H2O 2Fe3O4 + H2 → 6FeO + 2H2O 6FeO + 6H2 → 6Fe + 6H2O The peak C (third reduction peak) in the TPR profiles of the catalysts is allocated to reduction of Fe2O3 to Fe3O4 and Fe3O4 to FeO it has been reported that FeO is the main important intermediate during the reduction of oxidic iron to iron [35] although FeO is not stable in air. The fourth reduction peak (peak D) in the TPR profiles is attributed to final reduction step of FeO → Fe and Mn2O3 → MnO [36][37][38].…”

Section: Effect Of Drying Timementioning

confidence: 99%

Effect of Drying Conditions on the Catalytic Performance, Structure, and Reaction Rates over the Fe-Co-Mn/MgO Catalyst for Production of Light Olefins

Abdouss

Arsalanfar

Mirzaei

et al. 2017

Bull. Chem. React. Eng. Catal.

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The MgO-supported Fe-Co-Mn catalysts, prepared using co-precipitation procedure, were tested for production of light olefins via CO hydrogenation reaction. The effect of a range of drying conditions including drying temperature and drying time on the structure and catalytic performance of Fe-Co-Mn/MgO catalyst for Fischer-Tropsch synthesis was investigated in a fixed bed micro-reactor under the same operational conditions of T = 350 °C, P = 1 bar, H2/CO = 2/1, and GHSV = 4500 h -1 . It was found that the catalyst dried at 120 °C for 16 h has shown the best catalytic performance for CO hydrogenation. Furthermore, the effect of drying conditions on different surface reaction rates was also investigated and it was found that the precursors drying conditions influenced the rates of different surface reactions. Characterization of catalyst precursors and calcined samples (fresh and used) was carried out using powder X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), Brunauer-Emmett-Teller (BET) measurements, Temperature Programmed Reduction (TPR), Thermal Gravimetric Analysis (TGA), and Differential Scanning Calorimetry (DSC). Characterization results showed that different investigated variables (drying conditions) influenced the structure, morphology and catalytic performance of the ternary catalysts.

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Hydrocarbon production via Fischer–Tropsch synthesis from H2-poor syngas over different Fe-Co/γ-Al2O3 bimetallic catalysts

Cited by 117 publications

References 47 publications

Bimetallic catalysts for the Fischer–Tropsch reaction

Bimetallic catalysts for the Fischer–Tropsch reaction

Upgrading of Raw Gas from Biomass and Waste Gasification: Challenges and Opportunities

Effect of Drying Conditions on the Catalytic Performance, Structure, and Reaction Rates over the Fe-Co-Mn/MgO Catalyst for Production of Light Olefins

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