Alumina-supported cobalt–molybdenum sulfide modified by tin via surface organometallic chemistry: application to the simultaneous hydrodesulfurization of thiophenic compounds and the hydrogenation of olefins

Choi, Jae‐Soon; Maugé, Françoise; Pichon, Christophe; Olivier‐Fourcade, J.; Jumas, Jean‐Claude; Petit-Clair, Carine; Uzio, Denis

doi:10.1016/j.apcata.2004.03.005

Cited by 53 publications

(22 citation statements)

References 41 publications

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“…The Sn deposition on CoMoS active phase by surface organometallic chemistry was recently investigated by Choi et al [34]. While Mössbauer spectroscopy show that Sn may be located also on the CoMoS phase, it was found that the effect of Sn is to decrease the HDS/HydO selectivity by a stronger inhibition of HDS activity than the HydO activity.…”

Section: Extrapolation To Tin Doped Systemsmentioning

confidence: 99%

See 1 more Smart Citation

A DFT Study of CoMoS and NiMoS Catalysts: from Nano-Crystallite Morphology to Selective Hydrodesulfurization

Krebs

Daudin²,

Raybaud³

2009

Oil & Gas Science and Technology - Rev. IFP

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Résumé -Étude DFT des catalyseurs CoMoS et NiMoS : de la morphologie des nano-cristallites à l'hydrodésulfuration sélective -Cet article présente des résultats récents obtenus dans des études utilisant la théorie de la fonctionnelle de la densité (DFT) pour la caractérisation à l'échelle atomique des phases actives Co(Ni)MoS utilisées en catalyse d'hydrodésulfuration (HDS) sélective. L'effet des conditions du milieu réactionnel sulfo-réducteur sur la stabilité et la nature des sites actifs localisés au bord des nano-cristallites Co(Ni)MoS est mis en évidence. En combinant les calculs DFT et un modèle thermodynamique, il apparaît que la teneur en promoteur sur les bords des cristallites en conjonction avec la morphologie des cristallites dépend des conditions sulfo-réductrices. Nous montrons ensuite comment la nature des sites actifs Co(Ni)Mo influence l'HDS sélective de molécules soufrées légères (alkylthiophènes) vis-à-vis de l'hydrogénation (HydO) des oléfines légères (alkyl-butènes). La combinaison des calculs DFT d'adsorption de deux molécules modèles (2-méthyl-thiophène et 2,3-diméthyl-but-1-ène) avec la modélisation cinétique de la sélectivité HDS/HydO permet de proposer une explication de l'origine de cette sélectivité basée sur la compétition d'adsorption des réactifs. Abstract -A DFT Study of CoMoS and NiMoS Catalysts from Nano-Crystallite Morphology to Selective Hydrodesulfurization -This paper reports an overview of recent DFT studies on the atomic scale characterization of Co(Ni)MoS active phases used in selective hydrodesulfurization (HDS) catalysis. A peculiar attention is paid to the effect of the sulfo-reductive reaction conditions on the

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Section: Extrapolation To Tin Doped Systemsmentioning

confidence: 99%

“…The HDS/HydO selectivity has been the subject of recent experimental works on model molecules for FCC gasoline or real feed [29][30][31][32][33]. In specific conditions, it seems possible to modulate the HDS/HydO selectivity of the NiMoS [30,33] and CoMoS [34] active phases.…”

Section: Introductionmentioning

confidence: 99%

A DFT Study of CoMoS and NiMoS Catalysts: from Nano-Crystallite Morphology to Selective Hydrodesulfurization

Krebs

Daudin²,

Raybaud³

2009

Oil & Gas Science and Technology - Rev. IFP

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“…MoS 2 is remarkably more economical than Pt and more importantly Mo is about 10 4 times more abundant than Pt [8]. MoS 2 -based catalysts have been used as hydrogenation catalysts in industrial processes like hydrodesulphurisation (HDS) of crude oil [13][14][15]. Thus, Mo-based materials are interesting alternatives, becoming a trending material for researchers during the last few years [12].…”

Section: Introductionmentioning

confidence: 99%

MoS2-based materials as alternative cathode catalyst for PEM electrolysis

Corrales-Sánchez

Ampurdanés

Urakawa

2014

International Journal of Hydrogen Energy

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“…Both Pd and Ni catalysts are used for styrene hydrogenation. 3,4 The main problem of the PyGas streams is that they contain high amount of sulfided compounds, usually between 300 and 2000 ppm 1,3,5 that poison the catalysts. Thiophene is one of the main sulfided compounds causing deactivation of the catalysts by poisoning.…”

Section: Introductionmentioning

confidence: 99%

MORE ACTIVE AND SULFUR RESISTANT BIMETALLIC Pd-NI CATALYSTS

Betti¹,

Carrara²,

Badano³

et al. 2017

Quim. Nova

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The influence of the kind of metal precursor and the sequence of impregnation on the properties of Pd-Ni catalysts was evaluated during the test reaction of selective hydrogenation of styrene to ethylbenzene by means of physicochemical characterization. The focus was put on the final hydrogenating activity and the resistance to deactivation by sulfided compounds (thiophene). The used techniques of characterization were ICP, XPS, XDR, TPR, CO chemisorption and TEM. XPS results indicated the presence of different Pd species: Pd δ-, Pd 0 and Pd δ+ . In the case of the Ni containing catalysts, Ni 0 and NiO species were also detected. These palladium and nickel species would be responsables of the variation of activity and sulfurresistance of the catalysts. NiClPd catalysts had a higher resistance to deactivation by sulfur poisoning. This was associated to a higher concentration of Pd η+ Cl x O y species that would prevent the adsorption of thiophene by both steric and electronic effects. It could also be due to the lower concentration of Pd 0 and Ni 0 on these catalysts, as compared to those shown by the PdNiCl catalysts. Both the Pd 0 and Ni 0 species are more prone to poisoning because of their higher electronic availability.

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Alumina-supported cobalt–molybdenum sulfide modified by tin via surface organometallic chemistry: application to the simultaneous hydrodesulfurization of thiophenic compounds and the hydrogenation of olefins

Cited by 53 publications

References 41 publications

A DFT Study of CoMoS and NiMoS Catalysts: from Nano-Crystallite Morphology to Selective Hydrodesulfurization

A DFT Study of CoMoS and NiMoS Catalysts: from Nano-Crystallite Morphology to Selective Hydrodesulfurization

MoS2-based materials as alternative cathode catalyst for PEM electrolysis

MORE ACTIVE AND SULFUR RESISTANT BIMETALLIC Pd-NI CATALYSTS

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