Preparation and Catalysis of Carbon‐Supported Iron Catalysts for Fischer–Tropsch Synthesis

Sun, Bo; Xu, Ke; Nguyen, Luan; Qiao, Minghua; Tao, Franklin Feng

doi:10.1002/cctc.201200241

Cited by 108 publications

(60 citation statements)

References 165 publications

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“…The selectivity of the supported iron catalysts can be further improved by promotion. The supports for iron catalysts are mostly limited to SiO 2 , Al 2 O 3 , TiO 2 , carbon materials, and mixed SiO 2 -Al 2 O 3 oxides including zeolites [4,18]. It is commonly accepted that support chemical composition may have a strong impact on FT catalytic performance [5,2].…”

Section: Introductionmentioning

confidence: 99%

Pore size effects in high-temperature Fischer–Tropsch synthesis over supported iron catalysts

Cheng

Virginie

Ordomsky

et al. 2015

Journal of Catalysis

167

104

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Section: Introductionmentioning

confidence: 99%

Pore size effects in high-temperature Fischer–Tropsch synthesis over supported iron catalysts

Cheng

Virginie

Ordomsky

et al. 2015

Journal of Catalysis

167

104

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“…Regardless of these distinct advantages,t he study of carbon materials as supports for bimetallic FT catalysts remains limited. [23] Most carbon supports that have been used in FT reactions are based on CNTsa nd carbon nanofibres (CNFs), typically made by chemical vapour deposition (CVD) procedures. [24] These carbons tend to be highly graphitic and hydrophobic.…”

Section: Introductionmentioning

confidence: 99%

Carbon Spheres Prepared by Hydrothermal Synthesis—A Support for Bimetallic Iron Cobalt Fischer–Tropsch Catalysts

et al. 2015

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Carbon spheres (CSs) synthesised by the hydrothermal approach were explored as a model support material for a bimetallic Fe–Co Fischer–Tropsch (FT) catalyst. The CSs were characterised by N2 adsorption–desorption, thermogravimetric analysis, FTIR spectroscopy and powder XRD. If annealed at 900 °C for 4 h, the CSs exhibited an improved surface area, thermal stability and crystallinity. A series of Fe–Co bimetallic FT catalysts supported on the annealed CSs were prepared by co‐precipitation. A variety of Fe‐to‐Co ratios were used with the total metal loadings maintained at 10 %. Catalyst reducibility studies were performed by H2 temperature‐programmed reduction and in situ powder XRD. Catalysts with a Fe/Co ratio of 5:5 (w/w) showed Co–Fe alloy formation upon reduction at >450 °C. Interestingly, the presence of this alloy did not correlate with high C5+ selectivities during FT synthesis; rather the Co‐rich/Fe‐poor catalyst gave the best selectivity. The CSs allowed the metal–metal interactions in the bimetallic systems to be monitored because of the weak interaction of the metals with the support.

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“…[6][7][8] Iron catalysts possess some advantages,such as low cost and abundance, low selectivity to methane, and aw ide working-temperature range. [16,17] They possess valuable properties such as high surface area, thermala nd chemical inertness, and good recycling characteristics. [8][9][10] Also, the high selectivity of iron to lower olefins( C 2 -C 4 )p rovides ap romising non-petroleum based route to produce high-value chemicals, the so-called Fischer-Tropsch-to-olefins (FTO).…”

Section: Introductionmentioning

confidence: 99%

Potassium as a Structural Promoter for an Iron/Activated Carbon Catalyst: Unusual Effect of Component Deposition Order on Magnetite Particle Size and Catalytic Behavior in Fischer–Tropsch Synthesis

et al. 2018

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The structural and catalytic properties of nanosized Fe3O4 particles deposited on activated charcoal (AC) are drastically affected by the sequence of component deposition order. Preliminary alkalization of AC followed by Fe deposition leads to formation of small magnetite particles (modal size of 4 nm) with uniform distribution. This catalyst demonstrates much higher iron‐time yield in FT synthesis than counterparts prepared by co‐impregnation and sequential impregnation with a reverse order of component deposition (Fe, then K). The catalysts were characterized by nitrogen adsorption, X‐ray diffraction, transmission electron microscopy, temperature‐programmed reduction in Ar/H2, and CO/H2 flow and in situ magnetic measurements. After calcinations in argon, catalysts contain iron predominantly in the form of magnetite with minor amount of hematite in some cases. Activation of the catalyst in the CO/H2 stream prior catalytic test leads to the formation of surface Hegg carbide Fe5C2. Spent catalysts contain considerable amount of magnetite, which is presumably due to partial oxidation of carbide by water in the course of the FT reaction.

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Preparation and Catalysis of Carbon‐Supported Iron Catalysts for Fischer–Tropsch Synthesis

Cited by 108 publications

References 165 publications

Pore size effects in high-temperature Fischer–Tropsch synthesis over supported iron catalysts

Pore size effects in high-temperature Fischer–Tropsch synthesis over supported iron catalysts

Carbon Spheres Prepared by Hydrothermal Synthesis—A Support for Bimetallic Iron Cobalt Fischer–Tropsch Catalysts

Potassium as a Structural Promoter for an Iron/Activated Carbon Catalyst: Unusual Effect of Component Deposition Order on Magnetite Particle Size and Catalytic Behavior in Fischer–Tropsch Synthesis

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