Modifying the catalytic properties of hydrotreating NiMo–S phases by changing the electrodonor capacity of the support

López-Cruz, Carlos; Guzmán, Javier; Cao, Guang; Martı́nez, Cristina; Corma, Avelino

doi:10.1016/j.cattod.2021.08.002

Cited by 3 publications

(2 citation statements)

References 62 publications

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“…The ratio of corner to edge atoms [11] and slab length [12] are often reported as critical features governing the catalytic properties. The support is of course an important parameter to take into account, but most of the time its influence is discussed in terms of surface science since its acido-basic properties may modify the electronic properties of the supported active phase [13]. Nevertheless, the influence of the nanostructure of the carrier with different dimensions (fibers/nanotube and 2D lamellar) on the catalytic properties of the supported HDS catalysts has not been deeply studied in the literature or compared in the same catalytic conditions.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Microstructure of Composite CoMoS/Carbon Catalysts on Hydrotreatment Performances

et al. 2023

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Several CoMoS/carbons were successfully synthetized using hydrothermal-type approaches and a subsequent surface reaction for the promotion step with Co. The effect of the microstructure of carbons used as a matrix for CoMoS-based catalysts was studied in the case of hydrotreating reactions. It was found that 1D (nanofibers/tubes) or 2D (nanosheets) carbon nanostructures may influence the characteristics of the CoMoS crystallites (dispersion, promotion rate and orientation of the slabs) and as a consequence the catalytic properties. In particular, the HDS mechanism of the substituted 4-MethylDiBenzoThiophene (4-MDBT) was found to be microstructure-dependent, as well as the selectivity of 3-MethylThiophene (3-MT) HDS/2,3 DiMethylBut-2-eNe (2,3-DM2BN) hydrogenation.

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Section: Introductionmentioning

confidence: 99%

Effect of the Microstructure of Composite CoMoS/Carbon Catalysts on Hydrotreatment Performances

et al. 2023

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“…In this Article, we applied this technique to elucidate the carrier of an IR marker band with a peak at 1710 cm –1 (1750–1680 cm –1 , Figure ), a key enabler for the performance of a propietary active material after calcination and partial oxidation. − This marker band was only observed for active materials with high activities after calcination, but not in inactive materials or without calcination. Based on its vibrational frequency, this marker band could presumably be assigned to a C=O carbonyl stretch.…”

Section: Introductionmentioning

confidence: 99%

Isotope-Edited Fourier Transform Infrared Spectroscopy in Elucidating Surface Organic Species for Applications in Energy and Materials Science

Metz

Zhang

2022

Energy Fuels

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Organic reagents are commonly employed in making a wide range of materials and play crucial roles in enabling their activities or performances. However, the identity of organics in the final stages of active species is challenging to characterize, and the mechanisms of organics in active material development are difficult to understand due to limited techniques available at the heterogeneous interface of organic and inorganic phases. Hence, we present a study using isotopeedited FT-IR to elucidate the specific groups contributing to an IR marker band and shed light on the transformation mechanisms. The molecular source of the marker band at 1710 cm −1 was identified as a crucial problem for improving the activity of a propietary material under commercial development. This IR marker band was presumably a result of the orgnic molecules oleic aicds or oleylamine during synthesis. However, the prevailing hypotheses on the existing carbonyls from oleic acids or from the oxidation of most likely α-carbons of the oleylamine as the cause of the IR marker were ruled out using 1-13 C-isotope-labeled compounds. Suprisingly, the marker band was found to be associated with the remaining 17 carbons in oleic acids or oleylamine (most likely the olefinic double bonds), confirmed by the IR shift due to specific isotope labels at these positions. We demonstrate that isotope-edited FT-IR is a powerful technique in characterizing surface organic species on active materials, catalysts, or porous media materials with broad applications in energy and materials sciences.

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Bimetallic NiMo-supported Al2O3@TiO2 core-shell microspheres with high hydrodeoxygenation efficiency toward syringol

2023

J Sol-Gel Sci Technol

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Modifying the catalytic properties of hydrotreating NiMo–S phases by changing the electrodonor capacity of the support

Cited by 3 publications

References 62 publications

Effect of the Microstructure of Composite CoMoS/Carbon Catalysts on Hydrotreatment Performances

Effect of the Microstructure of Composite CoMoS/Carbon Catalysts on Hydrotreatment Performances

Isotope-Edited Fourier Transform Infrared Spectroscopy in Elucidating Surface Organic Species for Applications in Energy and Materials Science

Bimetallic NiMo-supported Al2O3@TiO2 core-shell microspheres with high hydrodeoxygenation efficiency toward syringol

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