Study of catalytic aquathermolysis of heavy oil in the presence of a hydrogen donor

Zhao, Fajun; Liu, Yongjian; Wu, Yongbin; Zhao, Xiuchen; Longri, Tan

doi:10.1007/s10553-012-0368-6

Cited by 38 publications

(12 citation statements)

References 6 publications

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“…However, such reaction types are the main source of free radicals in condensed phase in relatively lower temperatures that allow the use of the given compounds in reservoir conditions in order to upgrade heavy oil. Several studies, for instance [33,34] have been carried out on the influence of formic acid on the aquathermolysis processes, where significant increase in the content of paraffinic and naphthenic aromatic hydrocarbons with further decrease in fractions of resins and asphaltenes were observed. Other researchers [35] imply that cyclohexane is more effective in terms of decreasing coke content (45% vs. 41.3%) due to inhibition of polymerization reactions in the presence of hydrogen.…”

Section: Use Of Hydrogen Donorsmentioning

confidence: 99%

In-Situ Heavy Oil Aquathermolysis in the Presence of Nanodispersed Catalysts Based on Transition Metals

et al. 2021

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The aquathermolysis process is widely considered to be one of the most promising approaches of in-situ upgrading of heavy oil. It is well known that introduction of metal ions speeds up the aquathermolysis reactions. There are several types of catalysts such as dispersed (heterogeneous), water-soluble and oil soluble catalysts, among which oil-soluble catalysts are attracting considerable interest in terms of efficiency and industrial scale implementation. However, the rock minerals of reservoir rocks behave like catalysts; their influence is small in contrast to the introduced metal ions. It is believed that catalytic aquathermolysis process initiates with the destruction of C-S bonds, which are very heat-sensitive and behave like a trigger for the following reactions such as ring opening, hydrogenation, reforming, water–gas shift and desulfurization reactions. Hence, the asphaltenes are hydrocracked and the viscosity of heavy oil is reduced significantly. Application of different hydrogen donors in combination with catalysts (catalytic complexes) provides a synergetic effect on viscosity reduction. The use of catalytic complexes in pilot and field tests showed the heavy oil viscosity reduction, increase in the content of light hydrocarbons and decrease in heavy fractions, as well as sulfur content. Hence, the catalytic aquathermolysis process as a distinct process can be applied as a successful method to enhance oil recovery. The objective of this study is to review all previously published lab scale and pilot experimental data, various reaction schemes and field observations on the in-situ catalytic aquathermolysis process.

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Section: Use Of Hydrogen Donorsmentioning

confidence: 99%

In-Situ Heavy Oil Aquathermolysis in the Presence of Nanodispersed Catalysts Based on Transition Metals

et al. 2021

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“…Ряд исследователей [15,23] допускают возможность протекания реакции водяного газа (4) с образованием водорода, который может в дальнейшем расходоваться в процессах гидрирования, гидрогенолиза и др. :…”

Section: облагораживание тяжелого нефтяного сырья в среде субкритичесunclassified

Heavy Oil Upgrading in the Presence of Water

Елецкий¹,

Sosnin²,

Zaikina³

et al. 2017

J. Sib. Fed. Univ. Chem.

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“…Steam-injection, as a conventional method of exploitation, relying on the function of high-temperature steam, can only reduce the viscosity of heavy oil physically, with fewer changes of heavy components and lower viscosity reduction. Aquathermolysis reactions are relatively non-destructive, as compared to the higher temperature thermal cracking process [29][30][31][32]. There are very few detailed experimental studies on chemical interaction of Athabasca oil sands with water.…”

Section: Aquathermolysismentioning

confidence: 99%

“…A common chemical reaction (Eq. 1) believed to occur with these species involved their reaction with steam to produce methane, hydrogen sulfide, carbon dioxide, hydrogen and possibly low molecular weight hydrocarbons that are heavier than methane [29][30][31][32][33][34][35][36].…”

Section: An Overview Of Main Mechanismmentioning

confidence: 99%

Upgrading of Heavy Oil or Vacuum Residual Oil : Aquathermolysis and Demetallization

Lee¹,

Park²

2016

Applied Chemistry for Engineering

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It has been estimated that the Earth has nearly 1.688 trillion barrels of crude oil, which will last 53.3 years at current extraction rates. The organization of petroleum exporting countries (OPEC) group forecasted that the oil prices will not jump to triple-digit territory within a decade, but it can quickly increase as the political issue for reducing oil production appears. With the potential of serious shortage of conventional hydrocarbon resources, the heavy oil, one of unconventional hydrocarbon resources including oil sand and natural bitumen has attracted worldwide interest. The heavy oil contains heavy hydrocarbon compounds, commonly called as resins and asphaltenes, with long carbon chains more than sixty carbon atoms. The high content of heavier fraction corresponds with the high molecular weight, viscosity, and boiling point. Physicochemical properties of residues from vacuum distillation of conventional oil, referred to as vacuum residues (VR) were similar to those of heavy oil. For the development of heavy oil reserves, reducing the heavy oil viscosity is the most important. In this article, commercially employed aquathermolysis processes and their application to VR upgrading are discussed. VR contains transition metals such as Ni and V, but these metals should be eliminated in advance for further refining. Recent studies on demetallization technologies for VR are also reviewed.

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Study of catalytic aquathermolysis of heavy oil in the presence of a hydrogen donor

Cited by 38 publications

References 6 publications

In-Situ Heavy Oil Aquathermolysis in the Presence of Nanodispersed Catalysts Based on Transition Metals

In-Situ Heavy Oil Aquathermolysis in the Presence of Nanodispersed Catalysts Based on Transition Metals

Heavy Oil Upgrading in the Presence of Water

Upgrading of Heavy Oil or Vacuum Residual Oil : Aquathermolysis and Demetallization

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