CoMoB/Al 2 O 3 catalysts for hydrotreating of diesel fuel. The effect of the way of the boron addition to a support or an impregnating solution

Климов, О. В.; Vatutina, Yu.V.; Надеина, К.А.; Казаков, М. О.; Gerasimov, E. Yu.; Prosvirin, Igor P.; Larina, T. V.; Носков, А. С.

doi:10.1016/j.cattod.2017.07.004

Cited by 25 publications

(5 citation statements)

References 64 publications

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“…The introduction of additives such as F [106,107], Mg [108][109][110][111], B [112][113][114][115][116], P [86,[117][118][119], or Ga [76,[120][121][122][123][124] seems to correctly solve the migration phenomena, and to improve stability and lower the interaction between the active phase and the support. Nevertheless, other aspects, such as activity and selectivity should be carefully observed, since the surface and textural properties sometimes change drastically, and in most of the cases, large increases in the additive content, in fact, cause a decrease in activity [76,118].…”

Section: Inorganic Additivesmentioning

confidence: 99%

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

et al. 2019

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The literature from the past few years dealing with hydrodesulfurization catalysts to deeply remove the sulfur-containing compounds in fuels is reviewed in this communication. We focus on the typical transition metal sulfides (TMS) Ni/Co-promoted Mo, W-based bi- and tri-metallic catalysts for selective removal of sulfur from typical refractory compounds. This review is separated into three very specific topics of the catalysts to produce ultra-low sulfur diesel. The first issue is the supported catalysts; the second, the self-supported or unsupported catalysts and finally, a brief discussion about the theoretical studies. We also inspect some details about the effect of support, the use of organic and inorganic additives and aspects related to the preparation of unsupported catalysts. We discuss some hot topics and details of the unsupported catalyst preparation that could influence the sulfur removal capacity of specific systems. Parameters such as surface acidity, dispersion, morphological changes of the active phases, and the promotion effect are the common factors discussed in the vast majority of present-day research. We conclude from this review that hydrodesulfurization performance of TMS catalysts supported or unsupported may be improved by using new methodologies, both experimental and theoretical, to fulfill the societal needs of ultra-low sulfur fuels, which more stringent future regulations will require.

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Section: Inorganic Additivesmentioning

confidence: 99%

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

et al. 2019

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“…Typical hydrotreating catalysts of diesel fraction are CoMo/Al2O3 catalysts with trilobe or quadrilobe granular shape [1][2][3][4][5]. Nowadays, most of the solutions for improving the hydrotreating catalysts are aimed at tuning active component properties, namely, at the selective formation of the active phase [6][7][8][9]. To directly estimate the effect of changes in properties of the active component on catalytic activity, catalytic tests should exclude most of the process interference parameters.…”

Section: Introductionmentioning

confidence: 99%

Testing conditions for CoMo HDS catalyst in the kinetic region: integrated approach using the math calculations and catalytic experiments

Mukhacheva¹,

Vatutina²,

Mik³

et al. 2023

Chim.Tech.Acta

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The main idea of the investigation was to define testing parameters with the lowest influence of internal and external diffusion on catalytic activity in hydrodesulfurization of dibenzothiophene. Traditional experimental methods were used to determine the conditions for the influence of internal and external diffusion. Simultaneous change of a linear feedstock rate and a catalyst loading at constant weight hour space velocity were used to determine the process temperature (240–260 °C) at which the impact of external diffusion is minimal. Catalytic tests, including the variation of the catalyst fraction size, were carried out to define the conditions with the lowest influence of internal diffusion. It was found that when the catalyst with the fraction size of 0.1–0.25 mm was used, the fluctuation of sulfur conversion was the smallest. Besides, to validate experimental results, the calculations were performed with mass balance equations and expressions used for HDS modeling. The resulting data and catalytic experiments demonstrated that the lowest influence of internal and external diffusion is achieved at a temperature process less than 260 °C and a catalyst fraction of 0.1–0.25 mm.

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“…Alumina support by itself contains preferentially weak and strong Lewis acid sites [24]. When active metals are supported on alumina, the acidity increases by 1.5 times [25]. However, it was shown in [26] that in case of TPD-NH3, ammonia preferentially interacts with the promoter atom.…”

Section: Tpd-nhmentioning

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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CoMoB/Al 2 O 3 catalysts for hydrotreating of diesel fuel. The effect of the way of the boron addition to a support or an impregnating solution

Cited by 25 publications

References 64 publications

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

Testing conditions for CoMo HDS catalyst in the kinetic region: integrated approach using the math calculations and catalytic experiments

Comparison of the HDS DBT reaction using bulk and supported catalysts

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