Effect of support composition on hydrogenolysis of thiophene and Maya crude

Rana, Mohan S.; Huidobro, M.L.; Ancheyta, Jorge; Gómez, M.T.

doi:10.1016/j.cattod.2005.07.029

Cited by 45 publications

(31 citation statements)

References 44 publications

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“…a target of about 15 ppm in diesel by 2010 and sulfur reduction in gasoline had to reach about 50 ppm by 2006. Thus, in order to comply with these norms, the oil industry has been improving the performance of the hydrotreating process [1]. Therefore, refiners are looking for new catalysts with better activity as one of the most important ways to decide this problem.…”

Section: Introductionmentioning

confidence: 99%

Support effect on the properties of iron–molybdenum hydrodesulfurization catalysts

et al. 2006

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Two series of Mo and Fe containing catalysts have been prepared over alumina and titania supports using H 3 PMo 12 O 40 heteropolyacid (HPMo) and Fe salt of HPMo. Catalysts have been characterized by BET, SEM, IR, TPR, XPS methods and by their HDS activity in the reaction of thiophene conversion. The TiO 2 -supported catalysts with low Mo concentration (6 wt%) show higher HDS activity than the catalyst with 12 wt% Mo. Iron promoting effect (Fe/Mo $ 0.1) is observed with both, the aluminaand titania-supported catalysts. Iron supported over alumina increases Mo reducibility and decreases it on TiO 2 -supported catalysts. Compared to alumina-supported catalysts, the TiO 2 -supported catalysts show higher surface concentration of Mo 6+ and Mo 5+ in octahedral coordination -Mo(Oh). Iron increases the Mo(Oh) concentration even more. After sulfidation the Fe-containing catalysts show formation of different Mo valence states (Mo 4+ , Mo 5+ , Mo 6+ ), Fe-P, Mo-P and/or Fe-Mo-P bonds, which affect the HDS catalytic activity.

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Section: Introductionmentioning

confidence: 99%

Support effect on the properties of iron–molybdenum hydrodesulfurization catalysts

et al. 2006

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“…Additionally, it was reported that Mo and Co species are highly dispersed in small clusters on Al 2 O 3 AMgO supports [30]. In the same way, Guevara-Lara et al [26] On the other hand, it has been reported that the incorporation of small MgO loadings on the Al 2 O 3 does not change the alumina structure [25,28,33]. This has been explained as consequence either of the low concentration of MgO or the well dispersion of this oxide in the alumina matrix.…”

Section: Introductionmentioning

confidence: 92%

“…This has been explained as consequence either of the low concentration of MgO or the well dispersion of this oxide in the alumina matrix. Regarding for textural properties of catalysts containing MgO, most of the previous studies reported high specific surface areas, and the presence of meso-pore size distribution [25,26,28,33]; this type of pore size distribution is desirable for heavy crude oil hydroprocessing.…”

Section: Introductionmentioning

confidence: 98%

“…Due to the fact that this type of sites exhibits higher HDS activity, it is expected to obtain better catalysts [17,18]. On the other hand, the use of magnesia (MgO) as support for HDT catalysts has been proposed in the literatures [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] because MgO will be a promoter for surface properties in the support, such as acid-base site generation and support basicity. These properties of the MgO might provide favourable interactions between the support and acidic molybdenum species (MoO 3 ) [22,24] and, consequently, improve the formation of highly dispersed sulphide species [22].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, characterization and catalytic activity during hydrodesulphurization of dibenzothiophene of NiMoW catalysts supported on AlTi mixed oxides modified with MgO

Cervantes-Gaxiola¹,

Arroyo-Albiter²,

Maya-Yescas³

et al. 2012

Fuel

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“…Besides pore dispersing action, it contributes to the wetting and plasticizing functions [16][17][18][19][20][21][22][23]. Research has shown that the introduction of additives during the preparation of the catalyst increases its activity in hydrodesulfurization and denitrification reactions [24].…”

Section: Additivementioning

confidence: 99%

Effect of Polyethylene Glygol on Preparation and Performance of Ni-Mo Hydrodesulfurization Catalysts

Shi

Sun

Wang

et al. 2016

Chem Technol Fuels Oils

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N i -M o c a t a l y s t p re c u r s o r s w e re p re p a re d b y t h e p re c i p i t a t i o n m e t h o d . N i -M o b u l khydrodesulfurization catalysts were obtained from these precursors after proper drying, molding, and calcination. The effect of polyethylene glycol (PEG) with different molecular weights and in various dosages on the structure and catalytic properties of these catalysts was investigated by applying X-ray diffraction, low-temperature BET N 2 adsorption analysis, and scanning electron microscopic methods. It is shown that the structure, surface properties, and activity of the catalysts can be improved by adding PEG. The pore volume, specific surface area, and pore size of the catalysts increase gradually with increasing PEG dosage, and the dispersion of the active ingredient increases initially and then decreases.Significantly increasing the activity of supported hydrodesulfurization catalysts for the purpose of producing diesel fuel with ultra-low sulfur content to meet market demand is challenging due to the limitations with respect to the amount of active ingredient that can be loaded, so unsupported catalysts (bulk catalysts) have been receiving more attention [1][2][3]. These catalysts provide a greater degree of desulfurization, denitrification, and aromatics saturation [4-6], allowing their use for upgrading low-quality diesel

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Effect of support composition on hydrogenolysis of thiophene and Maya crude

Cited by 45 publications

References 44 publications

Support effect on the properties of iron–molybdenum hydrodesulfurization catalysts

Support effect on the properties of iron–molybdenum hydrodesulfurization catalysts

Synthesis, characterization and catalytic activity during hydrodesulphurization of dibenzothiophene of NiMoW catalysts supported on AlTi mixed oxides modified with MgO

Effect of Polyethylene Glygol on Preparation and Performance of Ni-Mo Hydrodesulfurization Catalysts

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