Competitive adsorptions between thiophenic compounds over a CoMoS/Al2O3 catalyst under deep HDS of FCC gasoline

Santos, Alan Silva dos; Girard, Etienne; Leflaive, P.; Brunet, Sylvette

doi:10.1016/j.apcata.2018.11.032

Cited by 15 publications

(38 citation statements)

References 15 publications

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“…When comparing the two catalysts (Table 4), it appears that BT is clearly more reactive than 3MT over the NiMoS catalyst, and has a similar reactivity to 3MT over NiMoS-P123 catalyst. The first result agrees with data reported in the literature and dealing with the reactivity of the two sulfur molecules in presence of CoMoS/Al 2 O 3 [35]. It has been explained by a stronger adsorption of BT compared to that of 3MT.…”

Section: Catalystsupporting

confidence: 90%

“…This mainly corresponds to a decrease in the formation of 2MB2N. These results are in agreement with the well-established reaction scheme where the HDS of 3MT involved consecutive reactions with olefins as intermediates [35]. No modification of selectivities is noticed between the two materials ( Table 5).…”

Section: Catalytic Performances In the Transformation Of Model Molecusupporting

confidence: 90%

“…However, the activity per molybdenum atom remained similar. As shown in Figure 14 for NiMoS catalyst, two products are formed, according to the reaction scheme previously established [35]: dihydrobenzothiophene (DHBT) corresponding to the partial hydrogenation of BT and ethylbenzene (EB) as the HDS product, this one being the main product. When comparing the two catalysts (Table 4), it appears that BT is clearly more reactive than 3MT over the NiMoS catalyst, and has a similar reactivity to 3MT over NiMoS-P123 catalyst.…”

Section: Catalystmentioning

confidence: 91%

“…Such results are interesting in the perspective of an industrial use where FCC feed comprises several sulfur molecules. As a matter of fact, it was shown recently [35] in a model feed representative of an FCC feed, that the transformation of 3MT was inhibited by the presence of BT. In the case of NiMoS-P123, its improved activity for 3MT might therefore allow an easier sulfur removal when this catalyst is used.…”

Section: Catalystmentioning

confidence: 99%

“…As previously reported [35], catalytic activity measurements were carried out in a fixed bed reactor at 523 K under a total pressure of 2 MPa with a ratio H 2 /feed of 360 NL/L. First, the catalyst was sulfided in situ under H 2 S/H 2 flow (10 mol% H 2 S) for 10 h at 673 K at atmospheric pressure.…”

Section: Catalytic Performancesmentioning

confidence: 99%

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Influence of Pluronic® P123 Addition in the Synthesis of Bulk Ni Promoted MoS2 Catalyst. Application to the Selective Hydrodesulfurization of Sulfur Model Molecules Representative of FCC Gasoline

et al. 2019

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A way to improve hydrotreatment processes is to enhance the intrinsic activity of Ni or Co promoted MoS2 catalysts that are commonly used in such reactions. The aim of this work was to investigate the impact of the presence of Pluronic® P123 as a structuring agent during the synthesis of Ni promoted MoS2 catalysts (named NiMoS) in water at room temperature. A series of analyses, i.e., X-ray diffraction (XRD), chemical analysis, inductively coupled plasma mass spectrometry (ICP-MS), nitrogen adsorption-desorption isotherms, transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS), helped in characterizing the NiMoS-P123 and NiMoS catalysts, the latter being prepared in the absence of polymer. Both compounds contained MoS2 phase (~85 atomic% considering Mo atoms), a similar amount of mixed Ni-Mo-S phase (40–50% considering Ni) and some amount of NiS and Ni-oxidized impurity phases. The main differences between the two catalysts were a much larger specific surface area (126 m2·g−1 instead of 31 m²·g−1) and a better dispersion of the active phase as shown by the lower slab stacking (2.7 instead of 4.8) for NiMoS-P123, and the presence of C in NiMoS-P123 (9.4 wt.% instead of 0.6 wt.%), indicating an incomplete decomposition of the polymer during thermal treatment. Thanks to its larger specific surface area and lower slab stacking and therefore modification of active Mo site properties, the compound prepared in the presence of Pluronic® P123 exhibits a strong increase of the catalytic activity expressed per Mo atom for the transformation of 3-methylthiophene. Such improvement in catalytic activity was not observed for the transformation of benzothiophene likely due to poisonous residual carbon which results from the presence of Pluronic® P123 during the synthesis.

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Section: Catalystsupporting

confidence: 90%

Section: Catalytic Performances In the Transformation Of Model Molecusupporting

confidence: 90%

Section: Catalystmentioning

confidence: 91%

Section: Catalystmentioning

confidence: 99%

Section: Catalytic Performancesmentioning

confidence: 99%

See 3 more Smart Citations

Influence of Pluronic® P123 Addition in the Synthesis of Bulk Ni Promoted MoS2 Catalyst. Application to the Selective Hydrodesulfurization of Sulfur Model Molecules Representative of FCC Gasoline

et al. 2019

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One‐pot Synthesis of Bulk NiMoS Catalysts: Influence of pH and Addition of Pluronic®P123. Hydrodesulfurization of Model Sulfur Molecules Representative of FCC Gasoline

et al. 2023

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The worldwide continual reinforcement of regulations for the production of cleaner fuels along with the larger demand for energy urge us to develop hydrotreatment sulfide catalysts exhibiting higher activity in hydrodesulfurization reactions and explore innovative synthesis strategies. In this work, a novel one‐pot synthesis method of unsupported NiMoS catalysts in water at ambient pressure and moderate temperature is described. The reaction conditions including pH variations and addition of a copolymer structuring agent were thoroughly investigated. Catalytic performances of the prepared bulk NiMoS catalysts were measured for the hydrodesulfurization of two model sulfur molecules, representative of FCC gasoline. Catalysts prepared at pH 7 without or with polymer exhibited roughly similar activity, resulting however from different characteristics favorable for catalyst efficiency probably compensating one another, i. e. a very high promotion rate for the first one and smaller particles along with larger specific surface area for the second.

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Novel four-dimensional approach for the structural characterization of neutral nitrogen compounds in vacuum gas oils using UHPLC-IM-QqToF analysis

Guillemant

Berlioz‐Barbier

Oliveira

et al. 2021

Analytica Chimica Acta

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Competitive adsorptions between thiophenic compounds over a CoMoS/Al2O3 catalyst under deep HDS of FCC gasoline

Cited by 15 publications

References 15 publications

Influence of Pluronic® P123 Addition in the Synthesis of Bulk Ni Promoted MoS2 Catalyst. Application to the Selective Hydrodesulfurization of Sulfur Model Molecules Representative of FCC Gasoline

Influence of Pluronic® P123 Addition in the Synthesis of Bulk Ni Promoted MoS2 Catalyst. Application to the Selective Hydrodesulfurization of Sulfur Model Molecules Representative of FCC Gasoline

One‐pot Synthesis of Bulk NiMoS Catalysts: Influence of pH and Addition of Pluronic®P123. Hydrodesulfurization of Model Sulfur Molecules Representative of FCC Gasoline

Novel four-dimensional approach for the structural characterization of neutral nitrogen compounds in vacuum gas oils using UHPLC-IM-QqToF analysis

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