Recent studies on the preparation, activation and design of active phases and supports of hydrotreating catalysts

Breysse, M.; Geantet, Christophe; Afanasiev, P.; Blanchard, Juliette; Vrinat, M.

doi:10.1016/j.cattod.2007.08.018

Cited by 139 publications

(71 citation statements)

References 96 publications

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“…temperature, pressure, type of catalyst), a series of complex reactions occurs during the hydroprocessing. These include the saturation of double bonds, heteroatom (sulphur, nitrogen, or oxygen) removal and, breakage and reorganization of C -C bonds (Breysse M. et al, 2008). In the case of the hydroprocessing of vegetable oils, the liquid products consist of straight chain n-alkanes with 15 -20 carbons, which are formed via three different reaction pathways: decarbonylation, decarboxylation, and hydrodeoxygenation (Sotelo-boy et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…alumina,zeolites, are found to possess high cracking activity due to their acidity, and therefore are less favourable for the hydrotreating process. Alumina is by far the most common support for hydrotreating catalysts containing nickel (or cobalt) and molybdenum (or tungsten) due to its relatively large surface area, easily controlled pore structure, high packing density, thermal stability, physical strength, and recoverability (Breysse M. et al, 2008). However, alumina develops strong interactions with metal oxide precursors which could favor the formation of undesired phases under certain reaction conditions.…”

Section: Introductionmentioning

confidence: 99%

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NiMo-sulfide supported on activated carbon to produce renewable diesel

Tapia¹,

Acelas²,

López³

et al. 2017

Univ. Sci.

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Citation: Tapia J, Acelas NY, López DP, Moreno A. NiMo-sulfide supported on activated carbon to produce renewable diesel, Universitas Scientiarum, 22 (1): 71-85, 2017. doi: 10.11144/Javeriana.SC22-1.nsoa Funding:The authors are grateful to Empresas Públicas de Medellín (EPM) for financing the project, "Programa de Producción de Bio-Hidrocarburos Líquidos para la Generación de Energía Eléctrica" (401466), and to the University of Antioquia for the financial support of the "Programa Sostenibilidad". AbstractDue to their weak polarity and large surface area, activated carbon supports have the potential to enhance the dispersion of metal-sulfides. It is expected that the absence of a strong metal-support interaction can result in the formation of a very active and stable Ni-Mo-S phase. In this study, catalysts with different amounts of nickel and molybdenum supported on a commercial activated carbon were prepared by a co-impregnation method and characterized by BET, XRF, and SEM techniques. The catalytic activity for hydroprocessing of Jatropha oil was evaluated in a batch reactor, and the composition of the liquid and gaseous products were determined. Results showed that gaseous products are mainly composed of high amounts of propane and small amounts of other light hydrocarbons (C1 to C5). Liquid hydrocarbon products consisted of a mixture containing mainly n-paraffins of C15-C18 and some oxygenated compounds. The catalysts with a mass fraction of 3 % Ni, 15 % Mo (Ni3Mo15/AC) presented the highest selectivity toward C17-C18 hydrocarbons, with a product distribution similar to a commercial alumina-supported Ni-Mo-S catalyst.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

NiMo-sulfide supported on activated carbon to produce renewable diesel

Tapia¹,

Acelas²,

López³

et al. 2017

Univ. Sci.

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“…Molybdenum sulfide (MoS 2 )-based catalysts, varyingly promoted with cobalt or nickel, are one of the most common metal sulfides used in HDT, with a strong emphasis on hydrodesulfurization (HDS) reactions (Brunet et al 2005;Egorova and Prins 2006;Álvarez et al 2008;Breysse et al 2008;Chianelli et al 2009;Klimov et al 2010). There are several common methods to synthesize this catalyst such as the direct sulfidation of molybdenum oxide, hydrothermal and sonochemical synthesis, and the relatively simple procedure of thermally decomposing ammonium tetrathiomolybdate (ATM) (Camacho-Bragado et al 2005;Devers et al 2002;Mdleleni et al 1998;Afanasiev 2008;Polyakov et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Influence of decomposition time and H2 pressure on properties of unsupported ammonium tetrathiomolybdate-derived MoS2 catalysts

Whelan

Banu

Luckachan³

et al. 2015

J Anal Sci Technol

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“…Therefore, development of new catalysts with high hydrodesulfurization (HDS) activity is required. Previous investigations (Breysse et al 2003(Breysse et al , 2008 indicate that the nature and characteristics of catalyst support have significant influence on the performance of HDS catalyst. Generally, for industrial NiMo and CoMo HDS catalysts, the supports are usually c-Al 2 O 3 or aluminosilicates rather than pure SiO 2 , mainly because of the stronger support-metal interaction and subsequent better HDS activity of Al 2 O 3 -supported catalyst than that of SiO 2 -supported catalyst (Scheffer et al 1988).…”

Section: Introductionmentioning

confidence: 99%

The surface properties of aluminated meso–macroporous silica and its catalytic performance as hydrodesulfurization catalyst support

et al. 2017

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Aluminated mesoporous silica was prepared by multiple post-grafting of alumina onto uniform mesoporous SiO 2 , which was assembled from monodisperse SiO 2 microspheres. Hydrodesulfurization (HDS) catalyst was prepared by loading Ni and Mo active components onto the aluminated uniform mesoporous SiO 2 , and its HDS catalytic performance was evaluated using hydrodesulfurization of dibenzothiophene as the probe reaction at 300°C and 6.0 MPa in a tubular reactor. The samples were characterized by N 2 physisorption, scanning electronic microscopy, Fourier transform infrared spectrum, X-ray diffraction (XRD), temperature-programmed desorption of ammonia (NH 3 -TPD), 27 Al nuclear magnetic resonance ( 27 Al-NMR) and high-resolution transmission electron microscopy (HRTEM). The results showed that the Si-OH group content of SiO 2 was mainly dependent on the pretreatment conditions and had significant influence on the activity of the NiMo catalyst. The surface properties of the aluminated SiO 2 varied with the Al 2 O 3 -grafting cycles. Generally after four cycles of grafting, the aluminated SiO 2 behaved like amorphous alumina. In addition, plotting of activity of NiMo catalysts supported on aluminated mesomacroporous silica materials against the Al 2 O 3 -grafting cycle yields a volcano curve.

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Recent studies on the preparation, activation and design of active phases and supports of hydrotreating catalysts

Cited by 139 publications

References 96 publications

NiMo-sulfide supported on activated carbon to produce renewable diesel

NiMo-sulfide supported on activated carbon to produce renewable diesel

Influence of decomposition time and H2 pressure on properties of unsupported ammonium tetrathiomolybdate-derived MoS2 catalysts

The surface properties of aluminated meso–macroporous silica and its catalytic performance as hydrodesulfurization catalyst support

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