Effect of high-temperature pre-reduction in Fischer–Tropsch synthesis on Fe/ZrO 2 catalysts

Al-Dossary, M.; Fierro, José Luis García

doi:10.1016/j.apcata.2015.03.031

Cited by 35 publications

(23 citation statements)

References 49 publications

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“…5 (b-e). This result was closely related to several previous studies [25][26][27] . Increasing the CA:N molar ratios led to an increased intensity of Fe-C and this was rather high in the 0.2CA and 0.3CA catalysts.…”

Section: Characterization Of Catalystssupporting

confidence: 93%

Active Fischer-Tropsch synthesis Fe-Cu-K/SiO 2 catalysts prepared by autocombustion method without a reduction step

Pengnarapat

Reubroycharoen

et al. 2018

Journal of Energy Chemistry

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Section: Characterization Of Catalystssupporting

confidence: 93%

Active Fischer-Tropsch synthesis Fe-Cu-K/SiO 2 catalysts prepared by autocombustion method without a reduction step

Pengnarapat

Reubroycharoen

et al. 2018

Journal of Energy Chemistry

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“…The relatively higher reduction temperature of the Ni/α-Al 2 O 3 catalyst compared to that reported by others [42] may be due to the larger particle size (recognized by XRD). The reduction of Fe/γ-Al 2 O 3 and Fe/ α-Al 2 O 3 catalysts are complicated and undergoes a number of stages, which has been reported by other literature [43,44]. It is suggested that Fe 2 O 3 is firstly reduced into magnetite at around 400°C followed by reduction to metallic Fe at higher temperatures, which produces some asymmetric and overlapped peaks.…”

Section: Product Characterization and Analysismentioning

confidence: 90%

Co-production of hydrogen and carbon nanotubes from real-world waste plastics: Influence of catalyst composition and operational parameters

Yao

Zhang

Williams

et al. 2018

Applied Catalysis B: Environmental

237

134

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A B S T R A C TThe use of Ni-Fe catalysts for the catalytic pyrolysis of real-world waste plastics to produce hydrogen and high value carbon nanotubes (CNT), and the influence of catalyst composition and support materials has been investigated. Experiments were conducted in a two stage fixed bed reactor, where plastics were pyrolysed in the first stage followed by reaction of the evolved volatiles over the catalyst in the second stage. Different catalyst temperatures (700, 800, 900°C) and steam to plastic ratios (0, 0.3, 1, 2.6) were explored to optimize the product hydrogen and the yield of carbon nanotubes deposited on the catalyst. The results showed that the growth of carbon nanotubes and hydrogen were highly dependent on the catalyst type and the operational parameters. Fe/ γ-Al 2 O 3 produced the highest hydrogen yield (22.9 mmol H 2 /g plastic ) and carbon nanotubes yield (195 mg g −1 plastic ) among the monometallic catalysts, followed by Fe/α-Al 2 O 3 , Ni/γ-Al 2 O 3 and Ni/α-Al 2 O 3 . The bimetallic Ni-Fe catalyst showed higher catalytic activity in relation to H 2 yield than the monometallic Ni or Fe catalysts because of the optimum interaction between metal and support. Further investigation of the influence of steam input and catalyst temperature on product yields found that the optimum simultaneous production of CNTs (287 mg g −1 plastic ) and hydrogen production (31.8 mmol H 2 /g plastic ) were obtained at 800°C in the absence of steam and in the presence of the bimetallic Ni-Fe/γ-Al 2 O 3 catalyst.

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“…For catalyst design, the selection of metals is limited to Fe, Co, Pd, Ni and Ru, which are the only ones that show high activity in the CO 2 hydrogenation upon moderate reaction conditions. Among them, only Fe-based catalysts show relatively high selectivity towards desired products while maintaining low selectivity towards undesired methane [9]. In addition, Fe-based catalysts are attractive to the industry due to their low cost, which is related to the abundance of iron in nature, and flexible product distribution [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…Since light olefins are in high demand, there is a large body of work related to their production by CO 2 hydrogenation ( [7][8][9][10][11][12][13][14][15][16][17][18] and references within). Recently, several published reviews focused on different aspects of catalyst design for the improvement of olefins production through this reaction [3,4,[12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Catalysts for the Conversion of CO2 to Low Molecular Weight Olefins—A Review

et al. 2021

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There is a large worldwide demand for light olefins (C2=–C4=), which are needed for the production of high value-added chemicals and plastics. Light olefins can be produced by petroleum processing, direct/indirect conversion of synthesis gas (CO + H2) and hydrogenation of CO2. Among these methods, catalytic hydrogenation of CO2 is the most recently studied because it could contribute to alleviating CO2 emissions into the atmosphere. However, due to thermodynamic reasons, the design of catalysts for the selective production of light olefins from CO2 presents different challenges. In this regard, the recent progress in the synthesis of nanomaterials with well-controlled morphologies and active phase dispersion has opened new perspectives for the production of light olefins. In this review, recent advances in catalyst design are presented, with emphasis on catalysts operating through the modified Fischer–Tropsch pathway. The advantages and disadvantages of olefin production from CO2 via CO or methanol-mediated reaction routes were analyzed, as well as the prospects for the design of a single catalyst for direct olefin production. Conclusions were drawn on the prospect of a new catalyst design for the production of light olefins from CO2.

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Effect of high-temperature pre-reduction in Fischer–Tropsch synthesis on Fe/ZrO 2 catalysts

Cited by 35 publications

References 49 publications

Active Fischer-Tropsch synthesis Fe-Cu-K/SiO 2 catalysts prepared by autocombustion method without a reduction step

Active Fischer-Tropsch synthesis Fe-Cu-K/SiO 2 catalysts prepared by autocombustion method without a reduction step

Co-production of hydrogen and carbon nanotubes from real-world waste plastics: Influence of catalyst composition and operational parameters

Catalysts for the Conversion of CO2 to Low Molecular Weight Olefins—A Review

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