In situ reactivation of spent NiMoP/γ-Al2O3 catalyst for hydrodesulfurization of straight-run gas oil

Santolalla-Vargas, C.E.; Santes, Vı́ctor; Gómez, Elizabeth; Sánchez-Minero, Felipe; Romero‐Ibarra, Issis C.; Goiz, O.; Lartundo-Rojas, L.; Díaz, Leonardo; Luna-Ramirez, Rosario; Reyes, J. A.; Valdés, Oscar

doi:10.1016/j.cattod.2019.03.015

Cited by 7 publications

(2 citation statements)

References 38 publications

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“…It revealed that MoS 2 nanoslabs got longer and thinner under mild to harsh reaction conditions, which led to a reduction in the number of active sites and a significant decrease in activity. In addition, the coke in the region of the active metals had a tendency to increase faster than that in the support regions. , Therefore, microstructure variations of the catalyst play a certain role in the reduction of activity.…”

Section: Introductionmentioning

confidence: 99%

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Diffusivities of Hydrocarbons in the Fresh and Aged Hydrotreating Catalysts Studied by Zero-Length Column Method

Chen

et al. 2022

Ind. Eng. Chem. Res.

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Diffusivities of a series of hydrocarbons with different configurations in two zeolites (ZSM-5 and SBA-15) and a hydrotreating catalyst (NiMo/Al 2 O 3 ) were determined by the zero-length column technique. The results revealed that the molecular configuration of hydrocarbons has a significant effect on the diffusion property in zeolites. In addition, the aromatics show surface diffusion effect in the mesoporous SBA-15 and NiMo/ Al 2 O 3 . The diffusion characteristic of 1,3,5-triisopropylbenzene (TiPB) was applied to evaluate the change of diffusion properties of a mesoporous-scale hydrotreating catalyst with 2000 h of deactivation. Arrhenius plots of the diffusional time constants show two distinct linear fitting regions for both the fresh and aged catalysts. The reduction degree in diffusivity over the aged catalyst shows an increasing tendency at low temperatures but gradually decreases at high temperatures. A correlation between pore size and diffusivities was established to reveal the influence of structure on its diffusion property.

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Section: Introductionmentioning

confidence: 99%

“…In addition, the coke in the region of the active metals had a tendency to increase faster than that in the support regions. 8,9 Therefore, microstructure variations of the catalyst play a certain role in the reduction of activity.…”

Section: Introductionmentioning

confidence: 99%

Diffusivities of Hydrocarbons in the Fresh and Aged Hydrotreating Catalysts Studied by Zero-Length Column Method

Chen

et al. 2022

Ind. Eng. Chem. Res.

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show abstract

Recent Advances in Hydrotreating/Hydrodesulfurization Catalysts: Part II—Catalyst Additives, Preparation Methods, Activation, Deactivation, and Regeneration

Valavarasu

Ramachandrarao

2021

Catalysis for Clean Energy and Environmental Sustainability

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Hierarchical macro-mesoporous Mo/Al2O3 catalysts prepared by dual-template method for oxidative desulfurization

Miao

Huang²,

Li³

et al. 2021

J Porous Mater

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In situ reactivation of spent NiMoP/γ-Al2O3 catalyst for hydrodesulfurization of straight-run gas oil

Cited by 7 publications

References 38 publications

Diffusivities of Hydrocarbons in the Fresh and Aged Hydrotreating Catalysts Studied by Zero-Length Column Method

Diffusivities of Hydrocarbons in the Fresh and Aged Hydrotreating Catalysts Studied by Zero-Length Column Method

Recent Advances in Hydrotreating/Hydrodesulfurization Catalysts: Part II—Catalyst Additives, Preparation Methods, Activation, Deactivation, and Regeneration

Hierarchical macro-mesoporous Mo/Al2O3 catalysts prepared by dual-template method for oxidative desulfurization

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