Application of Coker Gas Oil Used as Industrial Hydrogen Donors in Visbreaking

Chen, Q.; Yong-liang, Gao; Wang, Z. X.; Guo, Aijun

doi:10.1080/10916466.2012.721439

Cited by 18 publications

(17 citation statements)

References 8 publications

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“…It is known that the visbreaking of crude oil without H-donor additives can lead to significant coke formation, depending on the nature of the feedstock. 17,19,20 The lowest amount of coke (0.023 wt %) was observed for VR + kerosene, and the highest, for VR + HCO (0.18 wt %). The lowest conversion was obtained for VR + HCO (8.7 wt %).…”

Section: Resultsmentioning

confidence: 99%

“…In all cases, the coke formed during visbreaking was partially deposited on the reactor walls and remained in the composition of liquid products (0.03–0.18 wt %) (Table ). It is known that the visbreaking of crude oil without H-donor additives can lead to significant coke formation, depending on the nature of the feedstock. ,, The lowest amount of coke (0.023 wt %) was observed for VR + kerosene, and the highest, for VR + HCO (0.18 wt %). The lowest conversion was obtained for VR + HCO (8.7 wt %).…”

Section: Resultsmentioning

confidence: 99%

“…Some examples are light synthetic oils and gas oils; their narrow fractions; technological solvents and byproducts, such as furfural, a slurry and a decant oil (FCCS and FCCDO), a heavy cycle oil (HCO) produced by fluid catalytic cracking, etc. ; these are all studied as industrial H-donors. − However, such H-donor additives are complex mixtures of chemical compounds, depending on their origin, and therefore it is essential to identify candidates with optimal characteristics. The hydrogen-donating ability index is used to find their potential.…”

Section: Introductionmentioning

confidence: 99%

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Application of Ethylene Tar as an Additive in Visbreaking of Petroleum Vacuum Residue

et al. 2021

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The byproduct of ethylene tar has a high content of mono-, bi-, and polycyclic aromatic compounds, as well as cycloalkenes, including aromatic cycloalkenes. This paper evaluates the prospects of using ethylene tar as an additive in the visbreaking process of vacuum residue. A series of experiments on visbreaking of vacuum residue with additives of various refinery streams and ethylene tar were performed in a laboratory flow reactor. As a result of a comparative study of the composition of vacuum residue visbreaking products by different methods, it was shown that the use of ethylene tar compared with kerosene, light cycle oil, and heavy cycle oil allows an increased yield of the target product with a higher proportion of aromatic hydrocarbons. A comparative analysis of the characteristics of asphaltenes and resins of visbreaking products indicates a general trend of changes in the process of visbreaking vacuum residue with refinery streams and ethylene tar. A comparison of the colloidal instability index showed that the use of ethylene tar allows attainment of a more stable visbreaking product concerning refinery streams as additives.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Application of Ethylene Tar as an Additive in Visbreaking of Petroleum Vacuum Residue

et al. 2021

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“…Moreover, enzyme preparations have the advantage of short degradation time and they do not require the use of live microorganisms, which is conducive to application in heavy oil reservoirs with poor growth of oxygen-consuming microorganisms in situ. The high contents of longchain hydrocarbons with a complex structure, heteroatoms (e.g., O, N, S, and metals), and asphaltenes in heavy oil lead to its high viscosity [38]. Moreover, these adverse conditions usually have negative effects on biodegradation of the oil.…”

Section: Viscosity Reduction Of Heavy Oilmentioning

confidence: 99%

Microbial enhanced heavy oil recovery through biodegradation using fungal extracellular enzymes from Aspergillus spp.

Zhang

Gao

Lai

et al. 2020

Preprint

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Background: The progressive depletion of light crude oils has led to increased focus on efficient exploitation of heavy oil reserves to meet energy demand. Microbial enhanced oil recovery makes a substantial contribution to the recovery of heavy oils; however, most methods use bacteria, with less attention paid to the potential of fungi. In this study, we investigated the efficiency of fungal extracellular enzymes in biotransformation and biodegradation of heavy oil fractions into light compounds and the feasibility of the use of such enzyme preparations in enhanced oil recovery. Results: Two fungal strains of Aspergillus spp., isolated from bitumen samples, showed good growth on plates of mineral salts medium with heavy oil as the sole carbon source. The fungal extracellular enzymes, with dehydrogenase and catechol 2,3-dioxygenase activities, exhibited the ability to biodegrade heavy oil. The biodegradation process was coupled with abundant production of gases, mainly CO 2 and H 2 . Gas chromatography analysis revealed a significant redistribution of n -alkanes in the heavy oil after treatment with fungal enzyme preparations, which resulted in an increase in individual n -alkanes. The viscosity of the heavy oil was decreased 66.33% by fungal enzymatic degradation. Conclusions: These results demonstrate the potential of fungal extracellular enzymes from Aspergillus spp. for applications in enhanced heavy oil recovery, including biotransformation of heavy to lighter crude oil and byproduct biogas formation.

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“…Moreover, enzyme preparations have the advantage of short heavy oil degradation time and they do not require the use of live microorganisms, which is conducive to use in heavy oil reservoirs with poor growth of oxygenconsuming microorganisms in situ. The high contents of long-chain hydrocarbons with a complex structure, heteroatoms (e.g., O, N, S and metals), and asphaltenes in heavy oil lead to its high viscosity [37].…”

Section: Viscosity Reduction Of Heavy Oilmentioning

confidence: 99%

Microbially enhanced heavy oil recovery through biodegradation using fungal extracellular enzymes from Aspergillus spp.

Zhang

Gao

Lai

et al. 2019

Preprint

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Background: The progressive depletion of light crude oils has led to increased focus on efficient exploitation of heavy oil reserves to meet energy demand. Microbial enhanced oil recovery make a significant contribution to the recovery of heavy oils; however, most use bacteria, with less attention paid to the potential of fungi. Therefore, this study proposes the use of fungi in the form of extracellular enzymes to degrade heavy oil and improve its physicochemical property , thus increasing fluidity of heavy oil.Results: In this study, we investigated the efficiency of fungal extracellular enzymes in biotransformation and biodegradation of heavy oil fractions into light aliphatic and aromatic compounds and the feasibility of the use of such enzyme preparations in enhanced oil recovery. Two strains of Aspergillus spp., isolated from bitumen samples, showed good growth on plates of mineral salts medium with heavy oil as the sole carbon source. The fungal extracellular enzymes, with dehydrogenase and catechol 2,3-dioxygenase activities, exhibited the ability to degrade heavy oil, and coupled with abundant gas production. Gas chromatography analysis revealed a significant redistribution of n -alkanes in the heavy oil caused by the action of the fungal enzymes, resulting in an increase in individual n -alkanes. The viscosity of the heavy oil was decreased 66.33% by fungal enzymatic degradation. Conclusions: These results demonstrate the potential of extracellular enzymes from Aspergillus spp. for applications in enhanced heavy oil recovery, including biotransformation of heavy to lighter crude oil and byproduct biogas formation.

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Application of Coker Gas Oil Used as Industrial Hydrogen Donors in Visbreaking

Cited by 18 publications

References 8 publications

Application of Ethylene Tar as an Additive in Visbreaking of Petroleum Vacuum Residue

Application of Ethylene Tar as an Additive in Visbreaking of Petroleum Vacuum Residue

Microbial enhanced heavy oil recovery through biodegradation using fungal extracellular enzymes from Aspergillus spp.

Microbially enhanced heavy oil recovery through biodegradation using fungal extracellular enzymes from Aspergillus spp.

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