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

Lee, Hoo-Cheol; Park, Seung-Kyu

doi:10.14478/ace.2016.1069

Cited by 4 publications

(3 citation statements)

References 57 publications

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“…In general, the presence of catalysts favors the combination of hydrogen free radicals and hydrocarbon free radicals to form a stable molecule. In the process, the condensation of hydrocarbon free radicals is suppressed, and at the same time, the gas yield is reduced …”

Section: Results and Discussionmentioning

confidence: 99%

Effect of the Catalytic Aquathermolysis Process on the Physicochemical Properties of a Colombian Crude Oil

et al. 2021

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In this work, the catalytic aquathermolysis process of a Colombian heavy crude oil was studied. Reactivity tests were conducted in a microbatch reactor at 270 °C and saturation pressure of 5.5 MPa, during 66 h, using iron and molybdenum naphthenates in concentrations of 50−300 ppm as catalysts. The use of these catalysts reduced the gas yield from 1% to 4.2% w/w, the viscosity from 10% to 52.3% with iron naphthenate, and from 11.6% to 31.4% with molybdenum naphthenate. Crudes subjected to catalytic aquathermolysis increased their API gravity from 1.1 to 2.5 and 0.5 to 1.8 units, showing a significant decrease in complex fractions with boiling points above 340 °C and conversions in the order of 7% and 8% with respect to the precursors of molybdenum and iron naphthenates. Unlike other studies, the changes in the physical properties were correlated with changes in the chemical structure by ATR-FTIR spectroscopy. The average molecular parameters showed that the greatest differences with respect to the base crude oil were the length of the alkyl chains, the aromaticity, and the sulfurization. Results indicate different characteristics from the catalysts being studied, with iron naphthenate yielding better favorable effects in the change of the physicochemical properties of the improved crude oils. The experimental methodology proposed in this work indicates that the catalytic aquathermolysis process is a recovery method that allows for improving the properties of the crude oils, under reservoir conditions, due to the formation of products of smaller size and molecular weight.

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Section: Results and Discussionmentioning

confidence: 99%

Effect of the Catalytic Aquathermolysis Process on the Physicochemical Properties of a Colombian Crude Oil

et al. 2021

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“…Unconventional hydrocarbons like natural bitumen and heavy oil are crucial to meeting the world’s growing energy needs due to the decline of conventional oil reserves. , However, their extraction poses significant technical and environmental challenges. , The application of specialized techniques that enhance their mobility in an eco-friendly manner is vital for their sustainable and responsible extraction.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Thermal Recovery of Heavy Oil by In Situ Combustion: The Role of Micro and Nanostructured Manganese Oxide Catalysts

Khelkhal,

Ostolopovskaya,

Ahmed Hazila

et al. 2024

Ind. Eng. Chem. Res.

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Heavy oil reserves are recognized as being a significant yet challenging energy resource due to high viscosities. It is common knowledge that thermal recovery methods like in situ combustion rely on fuel deposition and oxidation to enhance oil mobility. This study explored micro and nanostructured manganese oxide catalysts to improve the efficiency of heavy oil oxidation. MnO composites were synthesized and characterized by X-ray powder diffraction (XRD), Scanning Electron Microscopy (SEM), Energy-dispersive X-ray (EDX), Thermogravimetric analysis (TGA), and N 2 physisorption. It has been found that the smaller nanoparticles showed higher surface area (38 m 2 /g), oleic acid content, and mesoporosity compared to the larger microparticles which exhibited a surface area of 12.85 m 2 /g. Moreover, differential scanning calorimetry (DSC) analysis confirmed the catalytic activity of both particle types by intensifying oxidation peaks and lowering activation energies. However, the isoconversional calculations revealed minimal difference in oxidation times between MnO micro and nanoparticles at various conversion rates. To overcome aggregation issues, MnO nanoparticles were incorporated onto SiO 2 nanospherical particles. As a result, MnO/SiO 2 composites exhibited increased surface area and pore volume. Most importantly, they demonstrated significantly enhanced heavy oil oxidation rates, especially at a high temperature oxidation region which is considered the main key of a successful application of in situ combustion. This work highlights the promise of nanostructured MnO catalysts to improve the efficiency and economics of thermal heavy oil recovery. Further optimization of parameters like size, morphology, and dispersion extent within the reservoir could enable these materials to stabilize the combustion front and maximize heavy oil production.

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“…Heavy oil and natural bitumen represent a different type of hydrocarbon resource in their composition, therefore, conventional oil development technologies are of little use. The development of innovative technologies for heavy oil and natural bitumen requires scientific knowledge of their composition and reactive capacity in various natural and technogenic processes [2,3].…”

Section: Introductionmentioning

confidence: 99%

Influence of Metal Oxides and Their Precursors on the Composition of Final Products of Aquathermolysis of Raw Ashalchin Oil

et al. 2021

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Experiments were conducted simulating hydrothermal conversion of heavy oil in the presence of carbonate, kaolin, Al2O3, Ni2+ and Cu2+, NiO mixed with poly-α-olefins, C6H8O7, C2H4O2 at 290–375 °C and 10–135 bar. Al2O3, carbonate at 375 °C and 135 bar, accelerated the resin degradation. Experiments with carbonate at 350 °C and 10 bar showed no significant composition changes. NiSO4, CuSO4, kaolin mineral, at 350 °C and 78 bar, accelerated decomposition of resins (from 35.6% to 32.5%). Al2O3 and carbonate at 290 °C and 14 bar led to the destruction of asphaltenes (from 6.5% to 4.7% by weight), which were adsorbed on the surface of carbonate. Al2O3, NiO, poly-α-olefins at 350 °C and 78 bar accelerated C–C bond cracking of high-boiling asphaltenes. C6H8O7, rock-forming carbonate, at 360 °C and 14 bar, contributed to the polymerization and polycondensation of hydrocarbons with the formation of additional resins. C2H4O2 and kaolin at 360 °C and 12 bar affected the reduction in the resin content from 35.6% to 31.9% wt. C2H4O2 interacted with the active metals with the formation of acetate salts exhibiting catalytic activity.

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

Cited by 4 publications

References 57 publications

Effect of the Catalytic Aquathermolysis Process on the Physicochemical Properties of a Colombian Crude Oil

Effect of the Catalytic Aquathermolysis Process on the Physicochemical Properties of a Colombian Crude Oil

Enhancing Thermal Recovery of Heavy Oil by In Situ Combustion: The Role of Micro and Nanostructured Manganese Oxide Catalysts

Influence of Metal Oxides and Their Precursors on the Composition of Final Products of Aquathermolysis of Raw Ashalchin Oil

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