A critical review of the impact of water on cobalt-based catalysts in Fischer-Tropsch synthesis

Okoye-Chine, Chike George; Moyo, Mahluli; Liu, Xinying; Hildebrandt, Diane

doi:10.1016/j.fuproc.2019.04.006

Cited by 58 publications

(23 citation statements)

References 119 publications

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“…It was also observed that SC5+ increased with increasing water partial pressure. This is because, an increase in the water partial pressure provokes an increase in the Co particle size, which is known to contribute to SC5+ improvement [89,148,149].…”

Section: Deactivationmentioning

confidence: 99%

Cobalt catalysts on carbon-based materials for Fischer-Tropsch synthesis: a review

Ghogia

Nzihou

Serp

et al. 2021

Applied Catalysis A: General

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Highlights Challenges and opportunities in Co/C catalyzed Fischer-Tropsch synthesis  Guidelines for the design of Co/C catalysts for Fischer-Tropsch synthesis  The choice of carbon materials as Fischer-Tropsch synthesis support is rationalized  The evolution of TOF and SC5+ with Co particle size is relatively complex  Effect of confinement and spillover on catalyst performances are discussed

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Section: Deactivationmentioning

confidence: 99%

Cobalt catalysts on carbon-based materials for Fischer-Tropsch synthesis: a review

Ghogia

Nzihou

Serp

et al. 2021

Applied Catalysis A: General

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“…Catalytic partial oxidation of methane (POM) to syngas is one of the promising routes due to the fact that it is an exothermic reaction and can produce syngas in a H 2 : CO ratio close to 2 as desired for Fischer-Tropsch synthesis according to the following chemical equation 3 One of the challenges in the catalytic POM is controlling the selectivity where the complete combustion to CO 2 and H 2 O is a competing reaction. The catalytic materials that exhibit high catalytic activity for this reaction are usually based on noble metals including Pt, Pd, Ru, and Rh.…”

Section: Introductionmentioning

confidence: 99%

{CH}_{4} + 1 / 2 O_{2} \to 2 H_{2} + CO, normalΔ H_{298}^{°} = - 36 kJ / mole .

…”

Section: Introductionmentioning

confidence: 99%

Enhanced selectivity of syngas in partial oxidation of methane: A new route for promising Ni‐alumina catalysts derived from Ni/ γ‐AlOOH with modified Ni dispersion

et al. 2020

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Partial oxidation of methane was studied over new Ni nanocatalysts prepared from Ni-impregnated γ-AlOOH, which were compared with their counterparts derived from impregnated γ-Al 2 O 3 and α-Al 2 O 3. The prepared catalysts were characterized by powder X-ray diffraction (XRD), N 2-sorption, H 2-temperatue programmed reduction, scanning electron microscopy, transmission electron microscopy, thermal gravimetric analysis, CO 2-and NH 3-temperatureprogrammed desorption, Raman spectroscopy, CO chemisorption, and diffuse reflectance infrared Fourier transform spectroscopy of adsorbed CO. Employing γ-AlOOH as the support precursor resulted in significantly improved textural properties and catalytic activity. The structure of the support precursor and its surface properties showed a strong influence on the type of Ni active species and their interactions with the support. γ-AlOOH-derived catalysts showed NiO as the dominant Ni species when calcined at 500 C to 650 C, while NiAl 2 O 4 became the sole phase at higher temperatures. On the other hand, mixtures of NiO and NiAl 2 O 4 formed over γ-Al 2 O 3 , calcined before impregnation, regardless of the precalcination temperature. All γ-AlOOHderived catalysts showed higher specific surface areas compared to their counterparts derived from impregnated γ-Al 2 O 3. Upon calcination at moderate temperatures, γ-AlOOH-derived catalysts also showed modified textural and morphological properties of the Ni active particles, including higher Ni dispersion, larger metal surface area, and smaller Ni crystallites. The support precursor and the pretreatment conditions showed a strong influence on the catalytic performance, which was referred to their significant effect on the type of the Ni species and interactions with the support. All catalysts showed higher catalytic activity than the α-Al 2 O 3-derived catalyst, with CH 4 conversion between 86% and 88.5% at 700 C. While γ-AlOOHand γ-Al 2 O 3-derived catalysts calcined at 650 C showed a stable CH 4 conversion around 88%, and higher syngas

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“…Iron, a relatively cheap and flexible catalyst for different operating conditions, promotes water gas shift reaction during FTS and ultimately puts it in a better position to catalyze syngas that is poor in hydrogen. Cobalt catalyst, however, is far more active than iron-based catalysts, but it is 250 times more expensive than iron-based catalysts, hence, it is usually employed as supported catalysts [4][5][6] Both Fe and Co-based catalysts are commonly supported on oxides of Si [7] , Ti [8] , Al [2] , Zr [9] and zeolites [ 10 , 11 ] to enhance dispersion, decrease the amount of active components, stabilize the active phase and successfully get rid of the heat produced in such an exothermic reaction. However, one of the main disadvantages of these supports is the associated unfavorable metal-support interaction that tends to impede reducibility and negatively affect the FT catalytic performance [12] .…”

Section: Introductionmentioning

confidence: 99%

Metal-organic framework (MOF)-derived catalysts for Fischer-Tropsch synthesis: Recent progress and future perspectives

Otun

Liu

Hildebrandt

2020

Journal of Energy Chemistry

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A critical review of the impact of water on cobalt-based catalysts in Fischer-Tropsch synthesis

Cited by 58 publications

References 119 publications

Cobalt catalysts on carbon-based materials for Fischer-Tropsch synthesis: a review

Cobalt catalysts on carbon-based materials for Fischer-Tropsch synthesis: a review

Enhanced selectivity of syngas in partial oxidation of methane: A new route for promising Ni‐alumina catalysts derived from Ni/ γ‐AlOOH with modified Ni dispersion

Metal-organic framework (MOF)-derived catalysts for Fischer-Tropsch synthesis: Recent progress and future perspectives

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