Quantitative comparison of iron and cobalt based catalysts for the Fischer-Tropsch synthesis under clean and poisoning conditions

Ma, Wanhong; Jacobs, Gary; Sparks, Dennis E.; Todić, Branislav; Bukur, Dragomir B.; Davis, Burtron H.

doi:10.1016/j.cattod.2019.04.011

Cited by 43 publications

(24 citation statements)

References 64 publications

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“…This is consistent with the study by Tavasoli et al [26]. Similar research was conducted by Ma et al [27] where Fe-based catalysts are rapidly poisoned by all sulfur-containing compounds, as these compounds withdraw electrons from the catalyst surface. Ma et al [27] also reported lower product selectivities due to sulfur poisoning.…”

Section: Effect Of Varying Fe Composition On Fts Activitysupporting

confidence: 92%

Effect of Changing Amounts of Promoters and Base Fe Metal in a Multicomponent Catalyst Supported on Coal-Based Activated Carbon for Fischer–Tropsch Synthesis

et al. 2021

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The effect of varying the amounts of metals Fe, Cu, K, and Mo was studied on a catalyst supported on activated carbon (AC), which is an item of novelty of this paper. The base-case catalyst contains 16% Fe, 0.9% K, 6% Mo, and 0.8% Cu relative to the AC support. For all of the catalysts used, alcohol production is small. The production of hydrocarbons depends upon the amount of Fe and other promoters used. The amount of Fe was increased from 0% to 32% on the catalyst containing base-case amounts of the other materials. While 0% Fe shows no activity towards Fischer–Tropsch synthesis (FTS), 32% Fe shows a marginal increase in FTS activity when compared with 16% Fe. Furthermore, the amount of K was increased from 0% to 1.8%, with the other metals in their base-case amounts. The selectivity of C1–C4 decreases with the addition of K, while the selectivity of C5+ increases. Analogously, the amount of Mo was increased from 0% to 12%. A small amount of Mo results in an increase in FTS activity but decreases with the addition of more Mo. Cu on the catalyst was increased from 0% to 1.6%, with 0.8% Cu proving optimum for FTS.

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Section: Effect Of Varying Fe Composition On Fts Activitysupporting

confidence: 92%

Effect of Changing Amounts of Promoters and Base Fe Metal in a Multicomponent Catalyst Supported on Coal-Based Activated Carbon for Fischer–Tropsch Synthesis

et al. 2021

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“…FT synthesis catalysts are prone to deactivation by low levels of many non-CHO species. [136][137][138][139][140] The sensitivity to specific non-CHO species is different for Fe-and Co-based catalysts, but generally speaking it is better to removal all non-CHO species from the raw synthesis gas.…”

Section: Syngas Cleaningmentioning

confidence: 99%

Conversion of waste to sustainable aviation fuel via Fischer–Tropsch synthesis: Front‐end design decisions

Sánchez

Link

Chauhan

et al. 2022

Energy Science & Engineering

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Front-end design decisions for a process to produce sustainable aviation turbine fuel from waste materials were presented. The design employs distributed conversion of wastes to oils, which are then transported to a central facility for gasification, syngas cleaning, Fischer-Tropsch synthesis and refining, that is, a spoke-and-hub approach. Different aspects of the front-end design, that is, the steps up to syngas cleaning, were evaluated. The evaluation employed a combination of case studies, calculations, experimental investigations, and literature review. The supply of sustainable aviation fuel (SAF) as a 50:50 mixture of wastederived and petroleum-derived kerosene to meet the demand of an international airport (Pearson, Toronto) was employed as case study. The amount of raw material required made it impractical to make use of only one type of waste. Using the same set of assumptions, it was shown that in terms of cumulative transport distance required, a spoke-and-hub approach was twice as efficient as centralized processing only. Technologies for decentralized production of oils were assessed, and oils produced by pyrolysis and hydrothermal liquefaction (HTL) in pilot-scale and larger facilities were procured and characterized. These oils were within the broader compositional space of pyrolysis oils and HTL oils reported in laboratory studies. The oil compositions were employed to study the impact of oil composition on entrained flow gasification. Thermodynamic equilibrium calculations of pyrolysis and HTL oil entrained flow gasification resulted in H 2 / CO ratios of syngas and O 2 consumption rates in a narrow range, despite the diversity of feeds. At the same time, to produce an equal molar amount of syngas (H 2 + CO), less HTL oil than pyrolysis oil was required as feed. Gas cleaning technologies were reviewed to ascertain types of contaminants anticipated after gasification, their removal effectiveness, and Fischer-Tropsch catalyst poisoning 1763

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“…While both Fe-and Co-based catalysts are economically feasible on an industrial scale, Fe-based catalysts are cheaper and less sensitive to chemical poisoning than Co-based catalysts. 12 Iron catalytic sites can provide additional H 2 to the system through the water-gas shift (WGS) reaction of CO and H 2 O, 13 and have a lower dehydrogenation activity than Co, which tends to produce olefins rather than paraffins. 1 Several forms of Fe oxides and Fe carbides have been identified in Fe-based catalysts, with the latter being the active phase for the carbon chain growth of CO. [14][15][16] In particular, the coordination of carbon atoms to Fe results in differences in the polarizability that affect FTS performance.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Thus, C 2 H* 4 + H* and C 2 H* 5 + H* are co-adsorbate states with infinite separation 81. The(11) and(12) steps are the hydrogenation of C 2 H* 4 and C 2 H* 5 species, respectively, and the (13) step corresponds to the desorption of C 2 H* 6 from the surface to the gas phase. Fig.8ashows that the thermodynamic energy required for the conversion of C 2 H* 4 to C 2 H* 5 is similar on both surfaces (0.71 and 0.62 eV for SiO x /χ-Fe 5 C 2 Ĳ001) and χ-Fe 5 C 2 Ĳ001), respectively).…”

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confidence: 99%

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Selective olefin production on silica based iron catalysts in Fischer–Tropsch synthesis

Lee

Seo

Chun

et al. 2022

Catal. Sci. Technol.

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Quantitative comparison of iron and cobalt based catalysts for the Fischer-Tropsch synthesis under clean and poisoning conditions

Cited by 43 publications

References 64 publications

Effect of Changing Amounts of Promoters and Base Fe Metal in a Multicomponent Catalyst Supported on Coal-Based Activated Carbon for Fischer–Tropsch Synthesis

Effect of Changing Amounts of Promoters and Base Fe Metal in a Multicomponent Catalyst Supported on Coal-Based Activated Carbon for Fischer–Tropsch Synthesis

Conversion of waste to sustainable aviation fuel via Fischer–Tropsch synthesis: Front‐end design decisions

Selective olefin production on silica based iron catalysts in Fischer–Tropsch synthesis

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