Effect of alumina and silica–alumina supported NiMo catalysts on the properties of asphaltenes during hydroprocessing of heavy petroleum

Leyva, Carolina; Ancheyta, Jorge; Centeno, Guillermo

doi:10.1016/j.fuel.2014.08.023

Cited by 15 publications

(12 citation statements)

References 12 publications

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“…And they could remarkably affect the molecular structures in HDS, HDN and hydrogenation of molecules [13] . The acidic property of silica-alumina catalyst deeply hydrogenated asphaltene aromatic rings and released more wrapped metals compared with alumina catalyst [198] . Table 10 lists literatures on hydroprocessing of asphaltenes.…”

Section: Hydroprocessing Pyrolysis and Gasificationmentioning

confidence: 99%

Asphaltenes: Separations, structural analysis and applications

Zuo

Shen

2019

Journal of Energy Chemistry

126

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Section: Hydroprocessing Pyrolysis and Gasificationmentioning

confidence: 99%

Asphaltenes: Separations, structural analysis and applications

Zuo

Shen

2019

Journal of Energy Chemistry

126

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“…Similar properties of asphaltenes from hydrotreated oils are obtained due to the effect of reaction time at moderate and severe conditions, especially at long residence times. Instead, the increased pressure does not have a significant effect in reducing the asphaltene content or on their structure, except when pressures are greater than 75 kg/cm 2 . ,− …”

Section: Introductionmentioning

confidence: 96%

“…Also, a high acidity of the supporting catalyst leads to an increase in the conversion of asphaltenes. Furthermore, a larger pore size and greater acidity of the supporting catalyst favor the rapid deactivation of the catalyst due to the deposition of coke and metals that occurs during the hydrocracking of feeds with high amounts of impurities. ,− …”

Section: Introductionmentioning

confidence: 99%

Characterization of Upgraded Oil Fractions Obtained by Slurry-Phase Hydrocracking at Low-Severity Conditions Using Analytical and Ore Catalysts

Quitian

Ancheyta

2017

Energy Fuels

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A heavy crude oil and its upgraded oils, obtained by batch slurry-phase hydrocracking at low-severity conditions with and without analytical-grade and ore catalysts rich in iron and molybdenum, were fractionated by atmospheric distillation and were deasphalted with the aim of identifying the fraction responsible for the upgrade of the flow properties. Light cuts were separated from the distillation bottoms at 260 °C. This latter fraction was further deasphalted with heptane at 25 kg/cm 2 and 60 °C for separation of maltenes and heptane insolubles. The heptane insolubles were subsequently fractionated into asphaltenes and toluene insolubles by Soxhlet extraction. Light cuts, bottoms, and maltenes were characterized by density, viscosity, simulated distillation, and elemental analysis. Light cuts were also characterized by PIONA analysis. Elemental analysis, 1 H and 13 C nuclear magnetic resonance, X-ray diffraction, and molecular-weight distribution by gel permeation chromatography were carried out for asphaltenes and toluene insolubles. The upgrade of the flow properties of hydrocracked products was found to be due to the increase of the light cut and maltene contents, which was caused by the hydrocracking of asphaltenes as well as the upgraded properties of the heavy crude oil, which are proportional to the active metal content and the hydrogenation capacity of the catalysts (Mo > Fe).

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“…Large pores can also be fundamental in avoiding pore mouth blocking in the catalysts [25] and therefore the development of hydroprocessing catalysts with significant mesoporosity has been of interest [26][27][28][29]. As part of a study on hydrocracking catalysts based on mesoporous alumina [27,30], it was observed that while conversion of boiling point fractions is dominated by thermal rather than catalytic cracking [31], HDA is markedly affected by the catalyst [27], which has also been reported to have influence on asphaltene structure [32].…”

Section: Introductionmentioning

confidence: 99%