Deactivation of a Co/Al2O3 Fischer–Tropsch catalyst by water-induced sintering in slurry reactor: Modeling and experimental investigations

Sadeqzadeh, Majid; Chambrey, Stéphane; Piché, Simon; Fongarland, Pascal; Luck, F.; Curulla‐Ferré, Daniel; Schweich, D.; Bousquet, Jacques; Khodakov, Andreï Y.

doi:10.1016/j.cattod.2013.03.022

Cited by 53 publications

(34 citation statements)

References 34 publications

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“…Significant sintering was observed for the working catalyst for an extended run in the demonstration reactor [21]. This is in good agreement with literature where several authors observed sintering during FTS [22][23][24].…”

Section: Deactivationsupporting

confidence: 91%

GTL using efficient cobalt Fischer-Tropsch catalysts

2016

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Section: Deactivationsupporting

confidence: 91%

GTL using efficient cobalt Fischer-Tropsch catalysts

2016

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“…Primarily, X-ray absorption near edge (XANES) analysis shows simultaneous increasing extent of reduction and increasing Co-Co coordination, due both to removal of oxygen and increases in particle size. Second, water is believed to cause chemical-assisted sintering [80,367,[372][373][374], especially at high partial pressures that occur at CO conversions above about 65% [223], although the exact mechanisms are debated. Minor surface oxidation [373,374] and surface wetting [375] have been proposed, although Saib et al have shown that cobalt oxidation is not an important deactivation route [79] in catalysts with Co particles >~8 nm, which are typical in commercial FTS catalysts.…”

Section: Case Study: Cobalt Based Fischer-tropsch (Ft) Catalyst Regenmentioning

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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“…Nonetheless, the proven knowledge from other applications such as gas-to-liquids (GTL) processes could be transferred. For instance, Sadeqzadeh et al [645,646] have shown that in the Fischer-Tropsch reactor within a GTL process, a similar catalyst would have a slower deactivation in a slurry reactor than in a fixed bed reactor, and thus the catalyst costs would be lower if a slurry reactor is selected [645,646]. Modeling can also help to identify the recommended modes of operation.…”

Section: Impact Of Reactor Modeling On the Design Of Multi-scale Processmentioning

confidence: 99%