Selective direct desulfurization way (DDS) with CoMoS supported over mesostructured titania for the deep hydrodesulfurization of 4,6-dimethydibenzothiophene

Naboulsi, Issam; Lebeau, Bénédicte; Aponte, Carlos F. Linares; Brunet, Sylvette; Mallet, Martine; Michelin, Laure; Bonne, Magali; Carteret, Cédric; Blin, Jean-Luc

doi:10.1016/j.apcata.2018.06.033

Cited by 26 publications

(24 citation statements)

References 39 publications

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“…). As reported previously [18,19], mesostructured TiO 2 induced the presence of Brønsted acidity which decreased with the temperature of the treatment of TiO 2 mainly at 550°C and 650°C. In the same way a high decrease of the total activity (A T ), HDS activity (A HDS ) and of Acid activity (A Acid. )…”

Section: Hds Of 46-dmdbtsupporting

confidence: 82%

“…In a recent paper, we have shown that a higher DDS selectivity for the HDS of 4,6-DMDBT was observed with CoMoS supported over mesostructured TiO 2 [19]. This shift towards DDS selectivity in the transformation of 4,6-DMDBT is unprecedented in literature.…”

Section: Introductionmentioning

confidence: 81%

“…Mesostructured titania have been synthesized according to the procedure reported in previous work using the triblock copolymer P123 (EO) 20 (PO) 70 (EO) 20 (labeled as P123) as surfactant [18][19]. To investigate the effect of thermal treatment temperature on the support properties and thus on the catalyst performance, the final mesostructured TiO 2 support (after Soxhlet extraction using ethanol) is treated at different temperatures from 380°C to 650°C for 1h under synthetic air atmosphere.…”

Section: Supports and Catalyst Preparationmentioning

confidence: 99%

“…As reported in previous papers [18,19], the catalysts are sulfided in situ in a fixed flow reactor using a sulfiding feed made of 5 % wt of dimethyl disulfide (DMDS) in n-heptane as solvent at a temperature of 350°C under a 4.0 MPa of total pressure during 14 hours. The temperature was then lowered to the reaction temperature (340°C).…”

Section: Catalytic Measurementsmentioning

confidence: 99%

“…Other supports like silica, zeolites, carbon, titania, and mixed metal oxides are reported to provide significant improvements compared to γ-Al 2 O 3 [12][13][14][15][16][17]. Among all these supports, TiO 2 is particularly intriguing [18][19][20][21]. For example, Klimova et al [20] have shown that NiMo catalysts supported on titania nanotubes allowed reaching high conversions of 4,6-DMDBT with a much lower proportion of hydrogenated product than using NiMo/Al 2 O 3 catalyst.…”

Section: Introductionmentioning

confidence: 99%

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Deep hydrodesulfurization of 4,6-dimethydibenzothiophene over CoMoS/TiO2 catalysts: Impact of the TiO2 treatment

et al. 2021

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Mesostructured titania as support for the CoMoS active phase in deep hydrodesulfurization (HDS) of 4,6-dimethydibenzothiophene (4,6-DMDBT) leads to an increase of the intrinsic HDS activity and a higher selectivity for direct desulfurization (DDS) for HDS reaction in contrast with the conventional CoMoS/alumina catalyst. The temperature treatment of the mesostructured TiO 2 support, modifies the catalyst's activity for the transformation of 4,6-DMDBT. The higher total and HDS activities were obtained after treatment at 380°C corresponding to the higher specific surface area and to a mesostructured TiO 2 material with a semi-crystalline anatase framework. Beyond 550°C, the specific surface area decreases strongly corresponding to a complete crystallization of the mesopores walls into anatase structure. Moreover, the temperature under which the support is treated prior its impregnation has no impact on the selectivity of the transformation routes of the sulfur compound.

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Section: Hds Of 46-dmdbtsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 81%

Section: Supports and Catalyst Preparationmentioning

confidence: 99%

Section: Catalytic Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Deep hydrodesulfurization of 4,6-dimethydibenzothiophene over CoMoS/TiO2 catalysts: Impact of the TiO2 treatment

et al. 2021

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Developing an Approach for Calculating Theoretical Minimum Hydrogen Consumption during Catalytic Hydrotreating of Diesel

Liu,

Zhang,

Luo

et al. 2024

ChemPlusChem

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Identifying the unnecessary H2 consumption existing in diesel hydrotreating process and calculating theoretical minimum H2 consumption are extremely critical for reducing H2 consumption in consideration of carbon reduction and resource utilization improvement. In this work, chemical reactions happened during diesel hydrotreating were categorized into hydrodesulfurization (HDS), hydrodenitrogenation (HDN), saturation of monocyclic aromatic hydrocarbons (MAHs), saturation of polycyclic aromatic hydrocarbons (PAHs), hydrogenation of olefins (HGO) and hydrocracking reactions (HCR). Then, in order to gain insights into where and how much H2 can be reduced, the ideal molecular compositions of the products were analyzed when theoretical minimum H2 was achieved for each type of reactions, which can give a genuine value of average relative molecular weight and average number of moles of H2 consumed per mole of reactants, leading to the establishment of method for calculating theoretical minimum H2 consumption. Additionally, the above method was used to calculate theoretical minimum H2 consumption of five diesel feedstocks with different properties to study the influence of content of S, N and PAHs in the feed on theoretical minimum H2 consumption. This method can provide guidance for experiments of H2 consumption reduction, and also help the refineries to save potential costs of H2.

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Hydrodenitrogenation of 1, 2, 3, 4‐Tetrahydroquinoline Over CoMoS/Mesostructured TiO₂ Catalysts

Brunet,

Roy,

Lebeau

et al. 2024

Energy Tech

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Herein, the design of new catalysts obtained by the dispersion of the CoMoS active phase on mesostructured titania having different pore size and kind of porosity (monomodal vs. dual) for hydrodenitrogenation (HDN) of 1, 2, 3, 4‐tetrahydroquinoline (1234THQ) is reported. Obtained results show that with a selectivity around 93%, the hydrogenated pathway is by far the main route for 1234THQ hydrodenitrogenation. It is also demonstrated that the catalytic activities depend on the mesopore diameter: the larger the size of the mesopores is, the higher the HDN activity is. Comparing with the conventional CoMoP/Al2O3 catalyst, a slightly higher activity is obtained for the mesostructured TiO2‐based catalyst due to the promoter effect of titania.

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Selective direct desulfurization way (DDS) with CoMoS supported over mesostructured titania for the deep hydrodesulfurization of 4,6-dimethydibenzothiophene

Cited by 26 publications

References 39 publications

Deep hydrodesulfurization of 4,6-dimethydibenzothiophene over CoMoS/TiO2 catalysts: Impact of the TiO2 treatment

Deep hydrodesulfurization of 4,6-dimethydibenzothiophene over CoMoS/TiO2 catalysts: Impact of the TiO2 treatment

Developing an Approach for Calculating Theoretical Minimum Hydrogen Consumption during Catalytic Hydrotreating of Diesel

Hydrodenitrogenation of 1, 2, 3, 4‐Tetrahydroquinoline Over CoMoS/Mesostructured TiO₂ Catalysts

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Selective direct desulfurization way (DDS) with CoMoS supported over mesostructured titania for the deep hydrodesulfurization of 4,6-dimethydibenzothiophene

Cited by 26 publications

References 39 publications

Deep hydrodesulfurization of 4,6-dimethydibenzothiophene over CoMoS/TiO2 catalysts: Impact of the TiO2 treatment

Deep hydrodesulfurization of 4,6-dimethydibenzothiophene over CoMoS/TiO2 catalysts: Impact of the TiO2 treatment

Developing an Approach for Calculating Theoretical Minimum Hydrogen Consumption during Catalytic Hydrotreating of Diesel

Hydrodenitrogenation of 1, 2, 3, 4‐Tetrahydroquinoline Over CoMoS/Mesostructured TiO2 Catalysts

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Hydrodenitrogenation of 1, 2, 3, 4‐Tetrahydroquinoline Over CoMoS/Mesostructured TiO₂ Catalysts