Identification of efficient promoters and selectivity trends in high temperature Fischer-Tropsch synthesis over supported iron catalysts

Barrios, Alan J.; Gu, Bang; Luo, Yi; Peron, Deizi V.; Чернавский, П. А.; Virginie, Mirella; Wojcieszak, Robert; Thybaut, Joris W.; Ordomsky, Vitaly V.; Khodakov, Andreï Y.

doi:10.1016/j.apcatb.2020.119028

Cited by 57 publications

(48 citation statements)

References 65 publications

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“…The roles of GHSV and feed ratio were considerable among the factors. Figure 4C shows increasing the feed ratio increases the adsorbed CO hydrogenation chances and in turn leads to the augmented amount of produced olefins 29,30 . It confirms the characteristic of Fe as a high‐temperature Fischer‐Tropsch catalyst.…”

Section: Resultssupporting

confidence: 60%

Investigating catalytic performance of Ag/Ce promoted Fe/ Al ₂ O ₃ catalyst in the CO hydrogenation process: Selectivity modeling and optimization using response surface methodology

Torang

Atashi

Zohdi‐Fasaei

et al. 2021

Intl J of Energy Research

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The present work has focused on the modeling and selectivity of a mesoporous alumina-supported Fe-Ag-Ce, a new CO hydrogenation catalyst, in a fixedbed microreactor, at different operating conditions as follows: temperature (260 C-340 C), total pressure (2-11 bar), syngas ratio (1-3), and GHSV (1800-3600 hours −1 ). The effects of operating conditions and their influence on the CO conversion, C 5+ selectivity, and light olefins selectivity (light olefinity) were studied using response surface methodology. The products' selectivity was primarily controlled via the reaction conditions. The responses in this catalytic system were described adequately by modified mathematical models. The simultaneous effects of cerium and silver promoters increased the ratio of olefin to paraffin over the iron catalyst in the Fischer-Tropsch synthesis. Model graphs indicated that maximum amounts of light olefins obtained at T = 323 C, P = 10.36 bar, H 2 /CO = 1.5, and GHSV = 3219 hours −1 . Catalysts' characterization was administered via X-ray diffraction, temperatureprogrammed reduction, and the measurements of N 2 adsorption such as BET and BJH methods. Highlights• Response surface models were developed for product selectivity of Fischer-Tropsch.• Addison of promoter improved both CO conversion and reaction selectivity.• The simultaneous effects of using cerium and silver increased the amount of olefin.• Optimization is used to find the maximum of the desirable products.

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Section: Resultssupporting

confidence: 60%

Investigating catalytic performance of Ag/Ce promoted Fe/ Al ₂ O ₃ catalyst in the CO hydrogenation process: Selectivity modeling and optimization using response surface methodology

Torang

Atashi

Zohdi‐Fasaei

et al. 2021

Intl J of Energy Research

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“…FT synthesis over the promoted iron catalysts can be conducted with substantial conversion even at atmospheric pressure. The selectivity to light olefins over the catalysts promoted with liquid metals such as bismuth and lead, 17 , 19 has been significantly increased. Third, easy reoxidation and reduction of bismuth species at the interface with the active phase may improve the catalyst stability and slow down carbon deposition.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, we discovered [16][17][18][19] strong promoting effects of Bi and Pb on the catalytic performance of iron FT catalysts. The reaction rates increased 5-10 times, while the selectivity to light olens was enhanced by 50%.…”

Section: Introductionmentioning

confidence: 99%

Mobility and versatility of the liquid bismuth promoter in the working iron catalysts for light olefin synthesis from syngas

Peron

Barrios

et al. 2020

Chem. Sci.

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“…% of Cu in Fe at 1123 K) [23] and is usually present as a separate metallic phase. Recently, we observed remarkable mobility [24,25] of metal promoters with low melting points such as Bi, Pd, Sb and Sn in iron catalysts during their activation and FT catalytic reaction. This mobility resulted in the formation of core shell structures identified by a combination of techniques and a major increase in FT reaction rate and light olefin selectivity.…”

Section: Introductionmentioning

confidence: 99%

Iron and copper nanoparticles inside and outside carbon nanotubes: Nanoconfinement, migration, interaction and catalytic performance in Fischer-Tropsch synthesis

Fellenberg

Addad

Hong

et al. 2021

Journal of Catalysis

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Carbon materials have attracted increasing attention as supports for metal catalysts. Ironcontaining carbon nanotubes often promoted with copper have found application in Fischer-Tropsch synthesis, which provides an alternative way for conversion of renewable feedstocks to chemicals and fuels. In carbon nanotubes, the active phase can be nanoconfined inside the channels or localized on the outer surface. In most of previous work, the distribution of metal nanoparticles inside or outside carbon nanotubes is considered to be immobile during the catalyst activation or catalytic reaction.In this paper, we uncovered remarkable mobility of both iron and copper species in the bimetallic catalysts between inner carbon nanotube channels and outer surface, which occurs in carbon monoxide and syngas, while almost no migration of iron species proceeds in the monometallic catalysts. This mobility is enhanced by noticeable fragility and defects in carbon nanotubes, which appear on their impregnation with the acid solutions of metal precursors and precursor decomposition. Remarkable mobility of iron and copper species in bimetallic catalysts affects the genesis of iron active sites, and enhances interaction of iron with the promoter. In the bimetallic iron-copper catalysts, the major increase in the activity was attributed to higher reaction turnover frequency over iron surface sites located in a close proximity with copper.

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Identification of efficient promoters and selectivity trends in high temperature Fischer-Tropsch synthesis over supported iron catalysts

Abstract: In this work, 29 elements (Li, K,

Cited by 57 publications

References 65 publications

Investigating catalytic performance of Ag/Ce promoted Fe/ Al ₂ O ₃ catalyst in the CO hydrogenation process: Selectivity modeling and optimization using response surface methodology

Investigating catalytic performance of Ag/Ce promoted Fe/ Al ₂ O ₃ catalyst in the CO hydrogenation process: Selectivity modeling and optimization using response surface methodology

Mobility and versatility of the liquid bismuth promoter in the working iron catalysts for light olefin synthesis from syngas

Iron and copper nanoparticles inside and outside carbon nanotubes: Nanoconfinement, migration, interaction and catalytic performance in Fischer-Tropsch synthesis

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Identification of efficient promoters and selectivity trends in high temperature Fischer-Tropsch synthesis over supported iron catalysts

Abstract: In this work, 29 elements (Li, K,

Cited by 57 publications

References 65 publications

Investigating catalytic performance of Ag/Ce promoted Fe/ Al 2 O 3 catalyst in the CO hydrogenation process: Selectivity modeling and optimization using response surface methodology

Investigating catalytic performance of Ag/Ce promoted Fe/ Al 2 O 3 catalyst in the CO hydrogenation process: Selectivity modeling and optimization using response surface methodology

Mobility and versatility of the liquid bismuth promoter in the working iron catalysts for light olefin synthesis from syngas

Iron and copper nanoparticles inside and outside carbon nanotubes: Nanoconfinement, migration, interaction and catalytic performance in Fischer-Tropsch synthesis

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Investigating catalytic performance of Ag/Ce promoted Fe/ Al ₂ O ₃ catalyst in the CO hydrogenation process: Selectivity modeling and optimization using response surface methodology

Investigating catalytic performance of Ag/Ce promoted Fe/ Al ₂ O ₃ catalyst in the CO hydrogenation process: Selectivity modeling and optimization using response surface methodology