Highly selective light olefin production via photothermal Fischer–Tropsch synthesis over α/γ-Fe2O3-derived Fe5C2 under low pressure

Song, Lizhu; Ouyang, Shuxin; Li, Peng; Ye, Jinhua

doi:10.1039/d2ta04067k

Cited by 9 publications

(6 citation statements)

References 40 publications

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“…Furthermore, the coexistence of Fe 5 C 2 (A) and Fe 5 C 2 (B) species was determined from two overlapping sextuplets in the 57 Fe Mössbauer spectra (Fig. 2c and Supplementary Table 8 ), which represented the different occupied sites of Fe in the crystallographic structure of Fe 5 C 2 52 . The aforementioned findings demonstrated that iron carbide, an active phase for the chain growth reaction, was mainly presented as the Fe 5 C 2 (510) phase in the spent catalysts 21 .…”

Section: Resultsmentioning

confidence: 99%

CO2 hydrogenation over Fe-Co bimetallic catalysts with tunable selectivity through a graphene fencing approach

Liang,

Liu,

Guo

et al. 2024

Nat Commun

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Tuning CO2 hydrogenation product distribution to obtain high-selectivity target products is of great significance. However, due to the imprecise regulation of chain propagation and hydrogenation reactions, the oriented synthesis of a single product is challenging. Herein, we report an approach to controlling multiple sites with graphene fence engineering that enables direct conversion of CO2/H2 mixtures into different types of hydrocarbons. Fe-Co active sites on the graphene fence surface present 50.1% light olefin selectivity, while the spatial Fe-Co nanoparticles separated by graphene fences achieve liquefied petroleum gas of 43.6%. With the assistance of graphene fences, iron carbides and metallic cobalt can efficiently regulate C-C coupling and olefin secondary hydrogenation reactions to achieve product-selective switching between light olefins and liquefied petroleum gas. Furthermore, it also creates a precedent for CO2 direct hydrogenation to liquefied petroleum gas via a Fischer-Tropsch pathway with the highest space-time yields compared to other reported composite catalysts.

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Section: Resultsmentioning

confidence: 99%

CO2 hydrogenation over Fe-Co bimetallic catalysts with tunable selectivity through a graphene fencing approach

Liang,

Liu,

Guo

et al. 2024

Nat Commun

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“…For iron‐based FTS catalysts, the growth of iron carbide is positively correlated with the reaction time. [ 57 ] Because the growth process of χ‐Fe 5 C 2 is also the process of increasing active sites, it makes iron‐based catalysts have better catalytic activity. Li et al [ 58 ] synthesized a series of different Fe/Si catalysts by co‐precipitation method.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Fischer–Tropsch synthesis performance on MOFs‐derived Fe‐based catalysts constrained by SiO₂

Chen

Jiang

Zhao

et al. 2023

Applied Organom Chemis

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Fischer–Tropsch synthesis (FTS) is an essential technology to produce clean fuel, and catalyst will affect syngas conversion efficiency and product distribution. For traditional oxides‐supported catalysts, the mutual constraint between active metal loading and dispersion at high metal loading is hard to overcome, which will hinder the synthesis of high‐performance FTS catalysts. Herein, we report an efficient method for synthesizing iron‐based catalysts with not only high loading but also high dispersion. By using metal–organic frameworks Fe‐MIL‐88B as the precursor, we synthesized a series of Fe@C@SiO2 catalysts by tuning the amount of tetraethyl orthosilicate (TEOS) through a one‐step method; TEOS was in situ introduced and followed by high‐temperature carbonization. The prepared catalyst possesses a Fe@C core–shell structure with carbon layer encapsulation. Meanwhile, the SiO2 in the catalyst can effectively confine iron particles and avoid the agglomeration of iron species during high‐temperature carbonization. Among these catalysts, the Fe@C@SiO2‐0.005 showed the greatest FTS performance because high iron dispersion was achieved at high iron loading. Further increase SiO2 content enhanced the confinement effect of SiO2 but generated inert Fe2SiO4 species, which decreased the adsorption and activation of reactants and FTS activity.

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“…This outcome suggests that the conversion of CO to light olefins and other products follows a photothermal pathway, a phenomenon also observed in catalysts such as CoAl-LDH-developed catalyst, 72 Ni/MnO, 73 titaniasupported Ni 2 P/Ni, 74 ruthenium−cobalt single atom alloy catalyst, 75 and the hydrophobic core−shell Fe/Fe 3 C-c, 76 and Fe 5 C 2 . 77 The corresponding activity has been summarized in Table 3. Considering the general reaction pathways of FTS, the CO direct dissociation (CO → C+O) is endothermic, while the H-assisted CO dissociation (CO+H → HCO) is exothermic and requires less energy input, as observed in Co-based catalysts.…”

Section: Fischer−tropsch Synthesis (Fts)mentioning

confidence: 99%

Shedding Light on Solar Olefin Synthesis: Advances and Perspectives

Lu,

Wang

2024

Energy Fuels

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Light olefins, crucial feedstocks in the chemical industry, are projected to reach a market size of USD 475.8 million by 2027. Traditional methods for producing light olefins, such as cracking and the Fischer–Tropsch process, are energy-intensive and heavily reliant on fossil fuels. These production methods contribute significantly to environmental issues, emitting approximately 400 million tons of CO2 annually. Integrating solar energy into the olefin synthesis process presents a promising avenue for enhancing sustainability and efficiency. Recent research reveals the potential of utilizing solar energy to activate light-alkanes and CO x , enabling solar olefin production via dehydrogenation, hydrogenation, and reduction reactions. This review overviews recent advancements and evaluates the prospects of solar energy utilization in olefin synthesis, emphasizing innovative approaches and their potential implications.

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Highly selective light olefin production via photothermal Fischer–Tropsch synthesis over α/γ-Fe₂O₃-derived Fe₅C₂ under low pressure

Abstract: Fischer-Tropsch synthesis is a petroleum-independent technology for converting syngas into value-added products, such as light olefins containing two to four carbon atoms, liquid fuels of alcohols or high alkanes. However,...

Cited by 9 publications

References 40 publications

CO2 hydrogenation over Fe-Co bimetallic catalysts with tunable selectivity through a graphene fencing approach

CO2 hydrogenation over Fe-Co bimetallic catalysts with tunable selectivity through a graphene fencing approach

Enhanced Fischer–Tropsch synthesis performance on MOFs‐derived Fe‐based catalysts constrained by SiO₂

Shedding Light on Solar Olefin Synthesis: Advances and Perspectives

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Highly selective light olefin production via photothermal Fischer–Tropsch synthesis over α/γ-Fe2O3-derived Fe5C2 under low pressure

Abstract: Fischer-Tropsch synthesis is a petroleum-independent technology for converting syngas into value-added products, such as light olefins containing two to four carbon atoms, liquid fuels of alcohols or high alkanes. However,...

Cited by 9 publications

References 40 publications

CO2 hydrogenation over Fe-Co bimetallic catalysts with tunable selectivity through a graphene fencing approach

CO2 hydrogenation over Fe-Co bimetallic catalysts with tunable selectivity through a graphene fencing approach

Enhanced Fischer–Tropsch synthesis performance on MOFs‐derived Fe‐based catalysts constrained by SiO2

Shedding Light on Solar Olefin Synthesis: Advances and Perspectives

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Product

Resources

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Highly selective light olefin production via photothermal Fischer–Tropsch synthesis over α/γ-Fe₂O₃-derived Fe₅C₂ under low pressure

Enhanced Fischer–Tropsch synthesis performance on MOFs‐derived Fe‐based catalysts constrained by SiO₂