Unravelling the K-promotion effect in highly active and stable Fe<sub>5</sub>C<sub>2</sub> nanoparticles for catalytic linear α-olefin production

Lee, Jin Hee; Lee, Hack-Keun; Kim, Kwangsoo; Rhim, Geun Bae; Youn, Myung-Joong; Jeong, Heondo; Park, Jae Hyung; Chun, Dong Hyun; Kim, Byung-Hyun; Park, Kang Hyun

doi:10.1039/d0ma00920b

Cited by 3 publications

(2 citation statements)

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“…The Fe 2p XPS spectrum of the Fe@C-1.0 sample carbonized at 700 • C was examined to identify the chemical states of Fe species (Figure 1D). Two obvious peaks located at ~724.7 and ~711.2 eV corresponded to Fe 3 O 4 in the final product of K-Fe 3 C@C nanohybrids, indicating the occurrence of surface oxidation due to air exposure [39,40]. Meanwhile, it was noteworthy that other coexistent peaks at ~720.1 eV and ~707.4 eV belonged to Fe 3 C species, according to the previous studies, which agreed well with the above XRD analysis [41].…”

Section: Characterization Of the Catalystssupporting

confidence: 87%

Direct Construction of K-Fe3C@C Nanohybrids Utilizing Waste Biomass of Pomelo Peel as High-Performance Fischer–Tropsch Catalysts

et al. 2022

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As the only renewable organic carbon source, abundant biomass has long been established and developed to mass-produce functionalized carbon materials. Herein, an extremely facile and green strategy was executed for the first time to in situ construct K-Fe3C@C nanohybrids directly by one-pot carbonizing the pomelo peel impregnated with Fe(NO3)3 solutions. The pyrolytically self-assembled nanohybrids were successfully applied in Fischer–Tropsch synthesis (FTS) and demonstrated high catalytic performance. Accordingly, the optimized K-Fe3C@C catalysts revealed excellent FTS activity (92.6% CO conversion) with highlighted C5+ hydrocarbon selectivity of 61.3% and light olefin (C2-4=) selectivity of 26.0% (olefin/paraffin (O/P) ratio of 6.2). Characterization results further manifest that the high performance was correlated with the in situ formation of the core-shell nanostructure consisting of Fe3C nanoparticles enwrapped by graphitized carbon shells and the intrinsic potassium promoter originated in pomelo peel during high-temperature carbonization. This work provided a facile approach for the low-cost mass-fabrication of high-performance FTS catalysts directly utilizing waste biomass without any chemical pre-treatment or purification.

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Section: Characterization Of the Catalystssupporting

confidence: 87%

Direct Construction of K-Fe3C@C Nanohybrids Utilizing Waste Biomass of Pomelo Peel as High-Performance Fischer–Tropsch Catalysts

et al. 2022

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“…(a) CO conversion and product selectivity of FTS results, (b) comparison of gasoline and C 5+ productivity results with previous works, − and (c) stability of the Fe/NDPC bio‑2 catalyst over a time on stream of 130 h.…”

Section: Resultsmentioning

confidence: 88%

Preparation of Nitrogen Doped Biochar-Based Iron Catalyst for Enhancing Gasoline-Range Hydrocarbons Production

Bai

Qin

et al. 2022

ACS Appl. Mater. Interfaces

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Developing catalysts to obtain high space time yield (STY) of gasoline-range hydrocarbons via Fischer−Tropsch synthesis (FTS) is a huge challenge due to the restriction of Anderson−Schulz−Flory distribution. Herein, a nitrogen doped biochar-based iron catalyst was synthesized by a one-step method using sugar cane bagasse as carbon precursor, which exhibited an excellent gasoline STY of 8.65 g C5−12 g Fe −1 h −1 , exceeding most reported catalysts. A strong positive relationship between the amount of pyrrolic N and long-chain hydrocarbons selectivity was displayed. The characterization results indicated that pyrrolic N configuration on anchor sites tuned effectively the dispersion of iron species and metal−support interaction as well as CO adsorption, improving the FTS performance.

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The synthesis of higher alcohols from CO2 hydrogenation over Mn-Cu-K modified Fe5C2 and CuZnAlZr tandem catalysts

et al. 2023

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The catalytic production of higher alcohols (HAs) is a promising path for converting CO2 into value-added chemical products. The application is still limited by the low selectivity of HAs (less than 10%) on most catalysts. Here, we report a tandem catalyst consisting of Mn-Cu-K modified iron carbide and CuZnAlZr catalyst. The modification of iron carbide with Mn, Cu and K promoters improves the formation of HAs (13.5% Sel.), and the construction of tandem catalysts with CuZnAlZr can further enhance the catalytic performance. By examining different catalyst filling methods and the filling ratio of the tandem catalyst, it was found that the powder mixing resulted in a higher selectivity of HAs with a mass ratio of the two components of 1:1, and a synergistic effect leads to a higher selectivity of HAs (15.5%) with about 40% of propanol and butanol among HAs.

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Unravelling the K-promotion effect in highly active and stable Fe₅C₂ nanoparticles for catalytic linear α-olefin production

Abstract: The K-doped Fe5C2@C/NPC nanocatalyst shows excellent performance with high selectivity and productivity for catalytic linear α-olefin production.

Cited by 3 publications

References 50 publications

Direct Construction of K-Fe3C@C Nanohybrids Utilizing Waste Biomass of Pomelo Peel as High-Performance Fischer–Tropsch Catalysts

Direct Construction of K-Fe3C@C Nanohybrids Utilizing Waste Biomass of Pomelo Peel as High-Performance Fischer–Tropsch Catalysts

Preparation of Nitrogen Doped Biochar-Based Iron Catalyst for Enhancing Gasoline-Range Hydrocarbons Production

The synthesis of higher alcohols from CO2 hydrogenation over Mn-Cu-K modified Fe5C2 and CuZnAlZr tandem catalysts

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Unravelling the K-promotion effect in highly active and stable Fe5C2 nanoparticles for catalytic linear α-olefin production

Abstract: The K-doped Fe5C2@C/NPC nanocatalyst shows excellent performance with high selectivity and productivity for catalytic linear α-olefin production.

Cited by 3 publications

References 50 publications

Direct Construction of K-Fe3C@C Nanohybrids Utilizing Waste Biomass of Pomelo Peel as High-Performance Fischer–Tropsch Catalysts

Direct Construction of K-Fe3C@C Nanohybrids Utilizing Waste Biomass of Pomelo Peel as High-Performance Fischer–Tropsch Catalysts

Preparation of Nitrogen Doped Biochar-Based Iron Catalyst for Enhancing Gasoline-Range Hydrocarbons Production

The synthesis of higher alcohols from CO2 hydrogenation over Mn-Cu-K modified Fe5C2 and CuZnAlZr tandem catalysts

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Unravelling the K-promotion effect in highly active and stable Fe₅C₂ nanoparticles for catalytic linear α-olefin production