Design of improved CoMo hydrotreating catalyst via engineering of carbon nanotubes@alumina composite support

Kazakova, Мariya A.; Vatutina, Yulia V.; Selyutin, Alexander G.; Prosvirin, Igor P.; Gerasimov, E. Yu.; Климов, О. В.; Носков, А. С.; Казаков, М. О.

doi:10.1016/j.apcatb.2023.122475

Cited by 11 publications

(4 citation statements)

References 57 publications

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“…For both processes, transition metals occupying the first row in the periodic table are relatively inactive, while those occupying the second and third rows have high activity. HDS conversion levels are high for Ru, Os, Ir, Rh, and Re, respectively, while HDN conversion levels are high for Ir, Os, Re, and [26][27][28]31] with permission from Elsevier.…”

Section: Periodic Trends Of Metals In Hydroprocessingmentioning

confidence: 99%

“…Reactivities followed the order: Ru > Rh > Mo > Pd > Zr > Nb, and RuS 2 emerged as the best catalyst for all the processes. Selectivities for hydrogenation vs. hydrogenolysis have also been mapped, highlighting the importance of the position of the metals on the periodic table [31] . Observations are that W, Pt, Ir, and Ru are highly selective for hydrogenation.…”

Section: Periodic Trends Of Metals In Hydroprocessingmentioning

confidence: 99%

“…Periodic trends for (A) conversion of dibenzothiophene; (B) conversion of quinoline. Reprinted from references[26][27][28]31]…”

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confidence: 99%

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Towards improvement of hydroprocessing catalysts - understanding the role of advanced mineral materials in hydroprocessing catalysts

Majodina,

Poswayo,

Dembaremba

et al. 2023

Miner Miner Mater

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Mineral materials play a pivotal in heterogeneous catalysts as active, support, or promoter components, with the oil refinery industry being one of the biggest beneficiaries. While conventional hydroprocessing catalysts have historically met the industry’s needs, the growing need to accommodate unique feedstocks, meet the increasing demand for environmentally acceptable products, obtain better product specifications, enhance selectivity for reactions to increase ratios for certain product cuts, and use more cost-effective and abundant mineral materials, has recently motivated for fresh considerations in the development of hydroprocessing catalysts. Based on periodic trends, noble metals possess the most desirable qualities, but their relative abundance in the Earth’s crust is too low to meet industry needs. They are costly and highly sensitive to sulfur poisoning. Mo and W lie in the sweet spot, but it is anticipated that they cannot meet the increasing demand. Investigations of electronic interactions of more economical and abundant metals, such as Nb, V, and Fe, with other elements and support materials have yielded a better understanding of synergistic effects that help to access noble metal-like qualities. This work contrasts conventional hydroprocessing catalysts and recently improved catalysts, detailing the chemistry considerations behind the selection of mineral materials used in the catalysts. It also explores how further manipulation of these mineral materials and synthesis approaches is driving toward more desirable properties. The work brings to the attention of the readers the challenges and opportunities for the further improvement of hydroprocessing catalysts to ensure environmental sustainability while meeting the industry’s growing needs.

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Section: Periodic Trends Of Metals In Hydroprocessingmentioning

confidence: 99%

Section: Periodic Trends Of Metals In Hydroprocessingmentioning

confidence: 99%

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Towards improvement of hydroprocessing catalysts - understanding the role of advanced mineral materials in hydroprocessing catalysts

Majodina,

Poswayo,

Dembaremba

et al. 2023

Miner Miner Mater

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“…It has been reported in the literature that the rational design of the support may improve the performance of hydrotreating catalyst by tuning the sulfide component composition, morphology, and dispersion. − Due to this, recently, to improve hydrotreating catalysts, approaches based on the use of composite supports consisting of alumina and materials characterized by other acid–base (TiO 2 , , SiO 2 , MCM-41, MgO, , TiO 2 –MgO ) or neutral (various carbon material − ) properties were proposed. In this regard, much attention has been paid to developing composite supports based on alumina and various carbon materials primarily because each has advantages when used as a support for hydrotreating catalysts.…”

Section: Introductionmentioning

confidence: 99%

Sorbitol Derived Carbon Coated Alumina Composite as a Promising Support for CoMoS Hydrotreating Catalyst

Kazakova,

Parfenov,

Golubtsov

et al. 2024

Ind. Eng. Chem. Res.

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The beneficial impact of carbon coated alumina (C@Al 2 O 3 ) implemented as support for the CoMoS hydrotreating catalyst has been demonstrated. A series of C@Al 2 O 3 supports with varying carbon contents were obtained by pyrolysis of sorbitol preliminarily impregnated in alumina from an aqueous solution. It was found that carbon coating positively affects the formation of the high-active CoMoS phase. However, control of the carbon content from 2.3 to 11.3 wt % is essential to maintain the sulfide particles dispersion and textural properties. CoMoS/C@Al 2 O 3 catalysts demonstrated superior hydrodesulfurization activity compared with CoMoS/Al 2 O 3 . The hydrodenitrogenation activity of most CoMoS/C@Al 2 O 3 samples is similar to CoMoS/Al 2 O 3 but decreases when the carbon content in the support exceeds 11.3 wt %. The determining factor in improving the CoMoS/C@Al 2 O 3 hydrodesulfurization activity is the formation of defective graphene fragments, which partially cover the alumina surface and help to reduce the support acidity and, therefore, metal−support interaction while maintaining the textural characteristics.

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Selective atomic layer deposition of NiO on MoOx/γ-Al2O3 to enhance the active catalytic phase formation for hydrodesulfurization of dibenzothiophene

Bahrani

Khodadadi

Mortazavi

2023

Applied Surface Science

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Design of improved CoMo hydrotreating catalyst via engineering of carbon nanotubes@alumina composite support

Cited by 11 publications

References 57 publications

Towards improvement of hydroprocessing catalysts - understanding the role of advanced mineral materials in hydroprocessing catalysts

Towards improvement of hydroprocessing catalysts - understanding the role of advanced mineral materials in hydroprocessing catalysts

Sorbitol Derived Carbon Coated Alumina Composite as a Promising Support for CoMoS Hydrotreating Catalyst

Selective atomic layer deposition of NiO on MoOx/γ-Al2O3 to enhance the active catalytic phase formation for hydrodesulfurization of dibenzothiophene

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