Hydroprocessing of heavy petroleum feeds: Tutorial

Ancheyta, Jorge; Rana, Mohan S.; Furimsky, Edward

doi:10.1016/j.cattod.2005.08.025

Cited by 201 publications

(130 citation statements)

References 43 publications

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“…Alumina has been widely used as a conventional catalytic support for hydrocracking processes. Recently, mesoporous alumina has been applied for hydrocracking studies due to its great capability to disperse Mo species, achieving higher activity during the hydrodesulfurization [14][15][16][17]. With these mesoporous catalysts, higher yields of liquid products have been obtained in the hydrocracking of residual oils [17].…”

Section: Introductionmentioning

confidence: 98%

Macroporous NiMo/alumina catalyst for the hydrocracking of vacuum residue

Kim

Nguyen‐Huy

Shin

2014

Reac Kinet Mech Cat

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We prepared a macro-mesoporous NiMo/alumina catalyst by the introduction of macroporosity to an alumina support, and tested its catalytic performance in the hydrocracking of vacuum residue for the first time. In this reaction, the use of the macro-mesoporous NiMo/alumina catalyst clearly led to a more desirable product distribution-a higher liquid yield and lower gas yield-than a mesoporous NiMo/alumina catalyst. This indicates that the macro-mesoporous catalyst structure facilitated hydrogenation relative to the mesoporous catalyst; for the latter, hydrocracking was relatively dominant. N 2 adsorption/desorption experiments confirmed that NiMo impregnation reduced the pore size and volume, as well as the surface area, implying that the NiMo phases were located inside the mesopores and macropores. Macroporosity in the alumina support played an important role in improving the accessibility of vacuum residue to the NiMo active sites located inside pores, which are responsible for hydrogenation. By promoting hydrogenation, the macro-mesoporous NiMo/alumina catalyst increased the liquid yield of the hydrocracking of vacuum residue.Electronic supplementary material The online version of this article (

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Section: Introductionmentioning

confidence: 98%

Macroporous NiMo/alumina catalyst for the hydrocracking of vacuum residue

Kim

Nguyen‐Huy

Shin

2014

Reac Kinet Mech Cat

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“…The reaction is usually performed at high temperature (>410 • C) and pressure (>15 MPa), with continuous addition and withdrawal of catalyst. Nevertheless, improvement of such processes needs to overcome a tricky limitation due to the instability of effluents leading to sediment formation and causing severe operability issues as well as catalyst deactivation [6,7]. Indeed, at high temperature, in thermal cracking conditions, cracking pathway is mainly assumed to take place by radical way [8,9].…”

Section: Introductionmentioning

confidence: 98%

Effect of acidity, hydrogenating phases and texture properties of catalysts on the evolution of asphaltenes structures during reside hydroconversion

2015

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“…The homogeneously dispersed catalyst and feedstock oil were added into the reactor simultaneously, the catalyst was actually a precursor which could be converted to the active metal sulfides through a sulfuration reaction. Many molybdenum compounds were used as homogeneously dispersed catalysts in slurry-phase hydrocracking due to the high hydrogenation activity of MoS 2 [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Slurry-phase hydrocracking of heavy oil and model reactant: effect of dispersed Mo catalyst

Ren

et al. 2015

Appl Petrochem Res

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Thermal hydrocracking and catalytic hydrocracking of heavy oil and model reactant have been carried out to investigate the effect of dispersed Mo catalyst on slurry-phase hydrocracking. The XRD and XPS patterns suggested that the major existence form of dispersed Mo catalyst in slurry-phase hydrocracking was MoS 2 . Experimental data revealed that the conversion of feedstock oils and model reactant increased with the presence of catalyst, while the yields of light products (gas, naphtha) and heavy products (vacuum residue, coke) decreased, the yields of diesel and vacuum gas oil increased in the meantime. Besides, the yields of aromatic hydrocarbon and naphthenic hydrocarbon in naphtha fraction decreased. Effect parameters R G (the ratio of i-C 4 H 10 yield to n-C 4 H 10 yield) and isoparaffin/n-paraffin ratio were proposed to study the reaction mechanism of slurry-phase hydrocracking, the smaller effect parameters showed that there was no carbonium ion mechanism in slurry-phase hydrocracking, which still followed the free radical mechanism, and that the isomerization ratio of products decreased with the presence of Mo catalyst.

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Hydroprocessing of heavy petroleum feeds: Tutorial

Cited by 201 publications

References 43 publications

Macroporous NiMo/alumina catalyst for the hydrocracking of vacuum residue

Macroporous NiMo/alumina catalyst for the hydrocracking of vacuum residue

Effect of acidity, hydrogenating phases and texture properties of catalysts on the evolution of asphaltenes structures during reside hydroconversion

Slurry-phase hydrocracking of heavy oil and model reactant: effect of dispersed Mo catalyst

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