Influence of the order of the catalysts in the stacked bed of VGO hydrotreating catalysts

Надеина, К.А.; Vatutina, Yu.V.; Mukhacheva, Polina P.; Krestyaninova, V.S.; Сайко, А.В.; Bykova, E.S.; Romanova, T.S.; Климов, О. В.; Данилевич, В. В.; Носков, А. С.

doi:10.1016/j.fuel.2021.121672

Cited by 9 publications

(1 citation statement)

References 42 publications

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“…In the present work, to verify the suitability of the newly developed method for the synthesis of a bulk catalyst, a comparison is made between the physicochemical and catalytic characteristics of a bulk Ni-Mo-W catalyst and those of a supported Ni-Mo/Al2O3 catalyst. Moreover, the supported catalyst was obtained using a technique developed specifically for the production of highly active catalysts for the hydrotreating [16][17][18]. The similarity of the systems also lies in the fact that the bulk catalyst contains pseudoboehmite as a binder, which is also used to prepare the support in Ni-Mo/Al2O3.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the HDS DBT reaction using bulk and supported catalysts

Mukhacheva,

Vatutina,

Nadeina

et al. 2024

Chim.Tech.Acta

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The paper describes in detail the procedure for the preparation of a granular bulk NiMoW catalyst and a supported reference NiMo/Al2O3 catalyst. Mention is made of investigations of the supported and bulk catalysts by various physico-chemical methods (nitrogen adsorption-desorption method, X-ray photoelectron spectroscopy, TPD-NH3, HRTEM and X-ray diffraction analysis). The experiments to estimate catalytic activity and compare rate constant of hydrodesulfurization of dibenzothiophene using both catalysts have been carried out. It is shown that textural properties of the catalysts significantly differ. The supported catalyst has more developed specific surface area and pore volume than the bulk catalyst. TPD-NH3 showed an increased acidity of the supported catalyst in comparison the bulk catalyst. It is shown by the X-ray photoelectron spectroscopy method that in both samples Mo on the surface is present exclusively in the form of Mo4+ ion. However, the bulk catalyst differs from the supported catalyst in that it contains a larger amount of Ni as part of the active NiMo(W)S phase. The catalytic activity tests demonstrated that the bulk catalyst is more active at 240, 250 and 260°C, it is discovered that the rate constant in hydrodesulfurization of dibenzothiophene for the bulk NiMoW catalyst is twice higher at 240ºC than that of the supported NiMo/Al2O3 catalyst.

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Section: Introductionmentioning

confidence: 99%