Hydrocracking of vacuum gas oil in the presence of supported nickel-tungsten catalysts

Composition of the reaction products formed by hydrogenation of pyridine at 300 °C and 15 MPa in the presence of 15 sulphided and unsulphided molybdenum and tungsten catalysts promoted by cobalt and by nickel, respectively, using alumina as the support in most cases, has been examined. It has been proved that the catalyst composition affects both its hydrogenation activity and the ratio of transalkylation to cracking (or hydrocracking) reactions. Relations between the catalyst composition and its activity and selectivity found for the reaction of pyridine differ from those reported for hydrogenolytic cleavage of thiophene, hydrogenation and isomerization of cyclohexene.

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Distillation of vacuum gas oil in a column with new packings

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/976/1/012017 ◽

2020 ◽

Vol 976 ◽

pp. 012017

Author(s):

M I Farakhov ◽

A G Laptev ◽

T M Farakhov ◽

A A Akhmitshin

Keyword(s):

Vacuum Gas Oil ◽

Gas Oil

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Apparent Kinetics of Co‐Gasification of Biomass and Vacuum Gas Oil (VGO)

Chemistry - An Asian Journal ◽

10.1002/asia.202001271 ◽

2020 ◽

Author(s):

Tareq A. Al-Attas ◽

Rahima A. Lucky ◽

Mohammed Mozahar Hossain

Keyword(s):

Vacuum Gas Oil ◽

Gas Oil ◽

Kinetics Of

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Co-Processing of Deoxygenated Pyrolysis Bio-Oil with Vacuum Gas Oil through Hydrocracking

Energy & Fuels ◽

10.1021/acs.energyfuels.1c00822 ◽

2021 ◽

Author(s):

Anton Alvarez-Majmutov ◽

Sandeep Badoga ◽

Jinwen Chen ◽

Jacques Monnier ◽

Yi Zhang

Keyword(s):

Vacuum Gas Oil ◽

Gas Oil ◽

Bio Oil

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Experimental Study on Co-hydroprocessing Canola Oil and Heavy Vacuum Gas Oil Blends

Energy & Fuels ◽

10.1021/ef4005835 ◽

2013 ◽

Vol 27 (6) ◽

pp. 3306-3315 ◽

Cited By ~ 13

Author(s):

Jinwen Chen ◽

Hena Farooqi ◽

Craig Fairbridge

Keyword(s):

Experimental Study ◽

Canola Oil ◽

Vacuum Gas Oil ◽

Gas Oil ◽

Oil Blends ◽

Heavy Vacuum Gas Oil

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The Fabrication of Ce Promoted Ni/ Mg/Al Mixed Oxides Hydrotalcite Washcoated Alloy, Monolith Catalyst for Catalytic Steam Cracking of Vacuum Gas Oil

Catalysis Today ◽

10.1016/j.cattod.2021.06.022 ◽

2021 ◽

Author(s):

Mitra Roustapisheh ◽

Davood Karami ◽

Nader Mahinpey

Keyword(s):

Mixed Oxides ◽

Vacuum Gas Oil ◽

Gas Oil ◽

Steam Cracking ◽

Monolith Catalyst ◽

Catalytic Steam Cracking

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Heavy Vacuum Gas Oil Upregulates the Rhamnosyltransferases and Quorum Sensing Cascades of Rhamnolipids Biosynthesis in Pseudomonas sp. AK6U

Molecules ◽

10.3390/molecules26144122 ◽

2021 ◽

Vol 26 (14) ◽

pp. 4122

Author(s):

Sarah A. Alkhalaf ◽

Ahmed R. Ramadan ◽

Christian Obuekwe ◽

Ashraf M. El Nayal ◽

Nasser Abotalib ◽

...

Keyword(s):

Quorum Sensing ◽

High Performance ◽

Lower Surface ◽

Comparative Approach ◽

Vacuum Gas Oil ◽

Pseudomonas Sp ◽

Gas Oil ◽

Expression Of Genes ◽

Regulation Of Biosynthesis ◽

Heavy Vacuum Gas Oil

We followed a comparative approach to investigate how heavy vacuum gas oil (HVGO) affects the expression of genes involved in biosurfactants biosynthesis and the composition of the rhamnolipid congeners in Pseudomonas sp. AK6U. HVGO stimulated biosurfactants production as indicated by the lower surface tension (26 mN/m) and higher yield (7.8 g/L) compared to a glucose culture (49.7 mN/m, 0.305 g/L). Quantitative real-time PCR showed that the biosurfactants production genes rhlA and rhlB were strongly upregulated in the HVGO culture during the early and late exponential growth phases. To the contrary, the rhamnose biosynthesis genes algC, rmlA and rmlC were downregulated in the HVGO culture. Genes of the quorum sensing systems which regulate biosurfactants biosynthesis exhibited a hierarchical expression profile. The lasI gene was strongly upregulated (20-fold) in the HVGO culture during the early log phase, whereas both rhlI and pqsE were upregulated during the late log phase. Rhamnolipid congener analysis using high-performance liquid chromatography-mass spectrometry revealed a much higher proportion (up to 69%) of the high-molecularweight homologue Rha–Rha–C10–C10 in the HVGO culture. The results shed light on the temporal and carbon source-mediated shifts in rhamonlipids’ composition and regulation of biosynthesis which can be potentially exploited to produce different rhamnolipid formulations tailored for specific applications.

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