Poisoning of cobalt catalyst used for Fischer–Tropsch synthesis

Sparks, Dennis E.; Jacobs, Gary; Gnanamani, Muthu Kumaran; Pendyala, Venkat Ramana Rao; Ma, Wanhong; Kang, Jungshik; Shafer, Wilson D.; Keogh, Robert A.; Graham, Ursula M.; Gao, Pei; Davis, Burtron H.

doi:10.1016/j.cattod.2013.01.011

Cited by 35 publications

(25 citation statements)

References 13 publications

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“…On basic Pt/KL zeolite catalysts, these short term, low concentration exposures are beneficial to produce Pt ensemble sizes that promote aromatization, while longer term or higher concentration exposures poison the catalyst both by forming Pt-S bonds and producing large crystallites that block pores, as shown by transmission electron microscopy (TEM) and X-ray absorption fine structure spectroscopy (EXAFS), and favor only dehydrogenation [50][51][52][53]. Other examples are sulfur added to Fischer-Tropsch catalysts that have been reported to have either beneficial or negligibly harmful effects, which are important considerations in setting the minimum gas clean-up requirements [27,30,[54][55][56]. S and P are added to Ni catalysts to improve isomerization selectivity in the fats and oils hydrogenation industry, while S and Cu are added to Ni catalysts in steam reforming to minimize coking.…”

Section: Parameter Definitionmentioning

confidence: 99%

Heterogeneous Catalyst Deactivation and Regeneration: A Review

2015

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Deactivation of heterogeneous catalysts is a ubiquitous problem that causes loss of catalytic rate with time. This review on deactivation and regeneration of heterogeneous catalysts classifies deactivation by type (chemical, thermal, and mechanical) and by mechanism (poisoning, fouling, thermal degradation, vapor formation, vapor-solid and solid-solid reactions, and attrition/crushing). The key features and considerations for each of these deactivation types is reviewed in detail with reference to the latest literature reports in these areas. Two case studies on the deactivation mechanisms of catalysts used for cobalt Fischer-Tropsch and selective catalytic reduction are considered to provide additional depth in the topics of sintering, coking, poisoning, and fouling. Regeneration considerations and options are also briefly discussed for each deactivation mechanism.

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Section: Parameter Definitionmentioning

confidence: 99%

Heterogeneous Catalyst Deactivation and Regeneration: A Review

2015

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“…In the case of H 2 S, the requirements can be very strict and concentrations as low as 1 ppm or below are required for some of the applications. This is for example the case when the downstream processing involves further conversion of the gas using transition metal catalysts such as cobalt based catalyst used in the Fischer-Tropsch synthesis [4]. Similarly, H 2 S concentrations below 1 ppm are required for the Solid Oxide Fuel Cells [5,6].…”

Section: Introductionmentioning

confidence: 98%

On the initial deactivation of MnxOy–Al2O3 sorbents for high temperature removal of H2S from producer gas

Chytil

Kure

Lødeng

et al. 2015

Fuel Processing Technology

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“…Nevertheless, Fe‐based catalysts are relatively more resistant towards S poisoning, which can be explained through the more favorable formation of a cobalt sulfide phase in the case of Co‐based catalysts . For example, Co/Al 2 O 3 poisoning has been reported for doping the material with as little as 10 ppm of sulfur (i.e., 1 S atom per 8300 Co atoms), when the catalyst was impregnated with an ammonium sulfide solution or even lower levels when the feed gas was spiked with S‐containing compounds . Further increasing the Na loading in this series of catalysts to weight loadings beyond 0.2 wt.% leads to a shift in the chain length propagation factor, to an increase of the C 5+ and to a decrease of the CH 4 selectivity together with a pronounced loss in activity.…”

Section: Resultsmentioning

confidence: 89%

Cobalt‐Iron‐Manganese Catalysts for the Conversion of End‐of‐Life‐Tire‐Derived Syngas into Light Terminal Olefins

Falkenhagen

Maisonneuve

Paalanen

et al. 2018

Chemistry A European J

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Co-Fe-Mn/γ-Al O Fischer-Tropsch synthesis (FTS) catalysts were synthesized, characterized and tested for CO hydrogenation, mimicking end-of-life-tire (ELT)-derived syngas. It was found that an increase of C -C olefin selectivities to 49 % could be reached for 5 wt % Co, 5 wt % Fe, 2.5 wt % Mn/γ-Al O with Na at ambient pressure. Furthermore, by using a 5 wt % Co, 5 wt % Fe, 2.5 wt % Mn, 1.2 wt % Na, 0.03 wt % S/γ-Al O catalyst the selectivity towards the fractions of C and CH could be reduced, whereas the selectivity towards the fraction of C olefins could be improved to 12.6 % at 10 bar. Moreover, the Na/S ratio influences the ratio of terminal to internal olefins observed as products, that is, a high Na loading prevents the isomerization of primary olefins, which is unwanted if 1,3-butadiene is the target product. Thus, by fine-tuning the addition of promoter elements the volume of waste streams that need to be recycled, treated or upgraded during ELT syngas processing could be reduced. The most promising catalyst (5 wt % Co, 5 wt % Fe, 2.5 wt % Mn, 1.2 wt % Na, 0.03 wt % S/γ-Al O ) has been investigated using operando transmission X-ray microscopy (TXM) and X-ray diffraction (XRD). It was found that a cobalt-iron alloy was formed, whereas manganese remained in its oxidic phase.

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Poisoning of cobalt catalyst used for Fischer–Tropsch synthesis

Cited by 35 publications

References 13 publications

Heterogeneous Catalyst Deactivation and Regeneration: A Review

Heterogeneous Catalyst Deactivation and Regeneration: A Review

On the initial deactivation of MnxOy–Al2O3 sorbents for high temperature removal of H2S from producer gas

Cobalt‐Iron‐Manganese Catalysts for the Conversion of End‐of‐Life‐Tire‐Derived Syngas into Light Terminal Olefins

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