Insight into sulphur compounds and promoter effects on Molybdenum-based catalysts for selective HDS of FCC gasoline

Fontaine, Céline; Romero, Y.; Daudin, Antoine; Devers, Élodie; Bouchy, Christophe; Brunet, Sylvette

doi:10.1016/j.apcata.2010.08.049

Cited by 23 publications

(11 citation statements)

References 36 publications

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“…Besides, the catalyst in which a low stacking degree was detected along with curved slabs [128], resulted in high activity [131] as reported by Nogueira et al [34] and Afanasiev [37] due to the presence of defects in the slabs as we discussed in Section 2.1. Similar results were observed for CoMo catalysts activated under hydrogen atmosphere displaying small MoS 2 slabs with low stacking number and higher activity (through DDS route) compared to the catalyst activated under nitrogen environment [129].…”

Section: Decomposition Of Thiosaltssupporting

confidence: 82%

“…This section describes the structure-activity relationship of promoted and un-promoted bulk MoS 2 catalysts derived from the decomposition of precursors such as thio-salts [128][129][130], an alkyl group-containing salts [131][132][133][134] and oxythiosalts [135,136], and others. Various factors associated with the catalyst performance and their effect on HDS activity and selective path (hydrogenation (HYD) or direct desulfurization (DDS)) have been reported in the literature, these include, the effect of carbon, promoter effect, transition metal sulfides, catalyst activation temperature, use of activation gas, and synthesis methods.…”

Section: Decomposition Of Thiosaltsmentioning

confidence: 99%

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Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

et al. 2019

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The literature from the past few years dealing with hydrodesulfurization catalysts to deeply remove the sulfur-containing compounds in fuels is reviewed in this communication. We focus on the typical transition metal sulfides (TMS) Ni/Co-promoted Mo, W-based bi- and tri-metallic catalysts for selective removal of sulfur from typical refractory compounds. This review is separated into three very specific topics of the catalysts to produce ultra-low sulfur diesel. The first issue is the supported catalysts; the second, the self-supported or unsupported catalysts and finally, a brief discussion about the theoretical studies. We also inspect some details about the effect of support, the use of organic and inorganic additives and aspects related to the preparation of unsupported catalysts. We discuss some hot topics and details of the unsupported catalyst preparation that could influence the sulfur removal capacity of specific systems. Parameters such as surface acidity, dispersion, morphological changes of the active phases, and the promotion effect are the common factors discussed in the vast majority of present-day research. We conclude from this review that hydrodesulfurization performance of TMS catalysts supported or unsupported may be improved by using new methodologies, both experimental and theoretical, to fulfill the societal needs of ultra-low sulfur fuels, which more stringent future regulations will require.

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Section: Decomposition Of Thiosaltssupporting

confidence: 82%

Section: Decomposition Of Thiosaltsmentioning

confidence: 99%

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

et al. 2019

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“…The surface areas of the products 1:100 and 1:1 (15 m 2 g –1 ) are twice as large as that of the product 1:10 (6 m 2 g –1 ). They are in the same order of magnitude than those reported in the literature for most unsupported Ni‐Mo‐S catalysts, that is, about 10 m 2 g –1 3b,3c,9…”

Section: Resultssupporting

confidence: 69%

Synthesis and Structuring of Ni MoS₂ by using an Ionic Liquid

et al. 2012

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To minimize air pollution resulting from exhaust gas emission, a decrease in the concentrations of the sulfur compounds in fuels has become a major issue in the last 10 years. The development of catalysts for the hydrodesulfurization process is a challenge for the oil industry. In the present work, a new and easy way to synthesize Ni-Mo-S hydrotreatment catalysts and in particular the effect of ionic liquids on the final structure was studied. It was shown that the addition of the ionic liquid [BMIM][NTf 2 ] to the main reactants [Ni(NO 3 ) 2 ·6H 2 O and (NH 4 ) 2 MoS 4 ] had a great impact on the [a]

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“…Consequently, the use of bulk characterization techniques is not adequate in determining the chemical state of Mobased catalysts. XPS provides interesting information concerning the state of highly dispersed catalysts and is a technique that has been used in similar studies to determine the extent and state of Mo sulfidation in the presence (Coulier et al 2002;Fontaine et al 2010) and absence (Muijsers et al 1995;Saih and Segawa 2003) of promoter over different supports (Muijsers et al 1995;Roukoss et al 2009). …”

Section: Xps Resultsmentioning

confidence: 99%

Comparison of Mo/MgO and Mo/γ-Al2O3 catalysts: impact of support on the structure and dibenzothiophene hydrodesulfurization reaction pathways

Heidarinasab

Soltanieh

Ardjmand

et al. 2016

Int. J. Environ. Sci. Technol.

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The MgO and P 2 O 5 -promoted c-Al 2 O 3 supports with alkaline and acidic natures, respectively, were prepared, impregnated with Mo atoms, and compared for dibenzothiophene (DBT) hydrodesulfurization (HDS) reaction. Ultraviolet spectroscopy and the principal component analysis were used to identify the impact of the supports on the reaction pathways. The catalysts were characterized by BET surface analysis, X-ray diffraction, temperature-programmed reduction, Fourier transform infrared, and X-ray photoelectron spectroscopy. The cAl 2 O 3 -supported catalyst favors the hydrogenation pathway relative to the MgO-supported catalyst, which facilitates the direct desulfurization route. The different performance was attributed to the dissimilar Mo phases that emerged during the activation procedure. The activation under sulfo-reductive condition changed the Mo atoms on c-Al 2 O 3 support into the sulfide phase while extra oxidation took place for the MgO-supported catalyst. The migration and consumption of loosely bonded bulk oxygen atoms with under-coordinated Mo atoms on the MgO support were introduced as a possible reason for such extra oxidation. DFT calculations predicted an interaction between the Mo/MgO catalyst and DBT via the electron donation from the catalyst oxygen atoms to the aromatic rings, resulting in weakening and breaking of the C-S bonds. In spite of the higher resistance of the MgO-supported catalyst toward coking and its superior activity, its lower hydrogenation capability suggested using a dualfunction catalyst. Accordingly, two catalysts were mixed and the synergism was observed in the HDS reaction of thiophene.

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Insight into sulphur compounds and promoter effects on Molybdenum-based catalysts for selective HDS of FCC gasoline

Cited by 23 publications

References 36 publications

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

Synthesis and Structuring of Ni MoS₂ by using an Ionic Liquid

Comparison of Mo/MgO and Mo/γ-Al2O3 catalysts: impact of support on the structure and dibenzothiophene hydrodesulfurization reaction pathways

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Insight into sulphur compounds and promoter effects on Molybdenum-based catalysts for selective HDS of FCC gasoline

Cited by 23 publications

References 36 publications

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

Synthesis and Structuring of Ni MoS2 by using an Ionic Liquid

Comparison of Mo/MgO and Mo/γ-Al2O3 catalysts: impact of support on the structure and dibenzothiophene hydrodesulfurization reaction pathways

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Synthesis and Structuring of Ni MoS₂ by using an Ionic Liquid