Experimental and theoretical study of NiMoW, NiMo, and NiW sulfide catalysts supported on an AlTiMg mixed oxide during the hydrodesulfurization of dibenzothiophene

Cervantes-Gaxiola, Maritza E.; Arroyo-Albiter, Manuel; Pérez-Larios, Alejandro; Balbuena, Perla B.; Valencia, Jaime Espino

doi:10.1016/j.fuel.2013.06.041

Cited by 43 publications

(12 citation statements)

References 68 publications

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“…Figure 7c onfirmst he poorly crystalline struc- ChemCatChem 2015, 7,1948 -1960 www.chemcatchem.org tures owing to the weak broad signals at 2q = 14.4 and 33.58 and no clear signals at 2q = 39.5 and 58.68,i ndicating that the dispersion of active components over the Al-SMCFs-x support surfacei sh igh and there are no aggregated particles formed after sulfurization. [15,56] However,t he signal at 14.48 shows that the MoS 2 crystals have the most stacked layers of all the sulfided catalysts. [15] Relativelyw eak peaks wereo bserved for the sulfided NiMo/Al-SMCFs-1.25 and NiMo/Al-SMCFs-1 catalysts, indicating the decreasedc rystallinity of the supported MoS 2 .I n addition, no other crystalline phases were detected by the XRD measurements of the sulfided catalysts.…”

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confidence: 99%

Synthesis of Al‐Containing Spherical Mesocellular Silica Foams with Different Pore Sizes and Their Applications as Catalyst Supports for Hydrodesulfurization of Dibenzothiophene

et al. 2015

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In the present work, a series of Al‐containing spherical mesostructured cellular silica foams (SMCFs) with different ultra‐large pore sizes were successfully synthesized by simply adjusting the mass ratio (x) of the swelling agent 1,3,5‐trimethylbenzene (TMB) to P123. The as‐synthesized Al‐SMCFs‐x were utilized as NiMo catalyst supports for the hydrodesulfurization of dibenzothiophene. The characterization results showed that, compared with other studied NiMo/Al‐SMCFs‐x catalysts, the NiMo/Al‐SMCFs‐1.25 catalyst exhibited higher sulfidation degree, higher dispersions of Ni and Mo species, shorter length, and lower stacking number of MoS2 slabs. It was also found that the NiMo/Al‐SMCFs‐1.25 catalyst possessed suitable physicochemical parameters [i.e., ultra‐large pore size (27.5 nm), high surface area (383 m2 g−1), and large pore volume (1.34 cm3 g−1), resulting in the formation of more type II active sites with more brim active sites. Consequently, the NiMo/Al‐SMCFs‐1.25 catalyst displayed outstanding catalytic performance for the hydrodesulfurization of dibenzothiophene.

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confidence: 99%

Synthesis of Al‐Containing Spherical Mesocellular Silica Foams with Different Pore Sizes and Their Applications as Catalyst Supports for Hydrodesulfurization of Dibenzothiophene

et al. 2015

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“…All the spectra were obtained based on the background deductions of the corresponding supports [20,30]. For both series of catalysts, a main broad band around 200-350 nm is observed, which is the sum of two peaks at around 230 and 280 nm [31] assigned to isolated tetrahedral W and polymeric octahedral W species, respectively [32]. This band shifts toward higher wavelength after adding ZrO 2 , indicating the decrease in tetrahedrally coordinated W and the increase in octahedrally coordinated W [20,33].…”

Section: Drsmentioning

confidence: 99%

Preparation of highly dispersed W/ZrO2–Al2O3 hydrodesulfurization catalysts at high WO3 loading via a microwave hydrothermal method

Wang

Yao

Zhan

et al. 2015

Fuel

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“…Meanwhile, Cervantes-Gaxiola et al also analyzed the differences of catalytic performance over NiMoW-, NiMo-, and NiW-supported catalysts in experiment and theory. 18 They found that the NiMoW/Al-Ti-Mg catalyst showed the higher HDS activity of DBT than bimetallic NiMo and NiW catalysts, which originated from the lower surface energy and higher density of d states.…”

Section: Introductionmentioning

confidence: 99%

Trimetallic Catalyst Supported Zirconium-Modified Three-Dimensional Mesoporous Silica Material and Its Hydrodesulfurization Performance of Dibenzothiophene and 4,6-Dimethydibenzothiophene

Meng

Duan

et al. 2019

Ind. Eng. Chem. Res.

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To prepare the highly active hydrodesulfurization (HDS) catalyst, modified Zr-KIT-5 materials were synthesized by in situ synthesis method and supported NiMoW trimetallic active phases for dibenzothiophene (DBT) and 4,6-dimethyldibenzothiphene (4,6-DMDBT) hydrodesulfurization reactions. The analysis of Fouriertransform infrared and X-ray photoelectron spectroscopy proved that Zr species had been incorporated into the skeleton of mesoporous KIT-5 material. Moreover, it was demonstrated from the Py-IR and high-resolution transmission electron microscopy characterizations that the embedded Zr species not only enhanced the acidity of catalysts but also modulated the distribution of active metals. Among all of the modified trimetallic catalysts, the NiMoW/ZrKT-60 displayed the highest HDS activities of DBT (99.5%) and 4,6-DMDBT (91.0%), which was derived from the open and large three-dimensional mesoporous channel, suitable acidity, and appropriate Mo(W)S 2 dispersion. Furthermore, for 4,6-DMDBT reaction, the NiMoW/ZrKT-60 catalyst with the highest B/L ratio (0.22) showed higher hydrogenation and the highest isomerization selectivity.

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Experimental and theoretical study of NiMoW, NiMo, and NiW sulfide catalysts supported on an AlTiMg mixed oxide during the hydrodesulfurization of dibenzothiophene

Cited by 43 publications

References 68 publications

Synthesis of Al‐Containing Spherical Mesocellular Silica Foams with Different Pore Sizes and Their Applications as Catalyst Supports for Hydrodesulfurization of Dibenzothiophene

Synthesis of Al‐Containing Spherical Mesocellular Silica Foams with Different Pore Sizes and Their Applications as Catalyst Supports for Hydrodesulfurization of Dibenzothiophene

Preparation of highly dispersed W/ZrO2–Al2O3 hydrodesulfurization catalysts at high WO3 loading via a microwave hydrothermal method

Trimetallic Catalyst Supported Zirconium-Modified Three-Dimensional Mesoporous Silica Material and Its Hydrodesulfurization Performance of Dibenzothiophene and 4,6-Dimethydibenzothiophene

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