Asphaltene Inhibition and Flow Improvement of Crude Oil with a High Content of Asphaltene and Wax by Polymers Bearing Ultra-Long Side Chain

Li, Xinyuan; Lu, Shu En; Niu, Meifei; Cheng, Ruzhen; Gong, Yanjun; Xu, Jun

doi:10.3390/en14248243

Cited by 11 publications

(11 citation statements)

References 22 publications

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“…However, a high API gravity does not necessarily mean that SWA treatment will be highly effective for oil removal as it is affected by various factors. High wax and asphaltene content can make light oils become difficult to remove and recover because of wax deposition and asphaltenes precipitation (Li et al, 2021). In real oil spill scenarios, it usually takes some time from the occurrence of an oil spill to the time when the spilled oil is cleaned up, so the stranded oil will undergo a series of weathering processes, such as evaporation, emulsification, oxidation, and biodegradation, leaving high percentages of large and recalcitrant components (Ossai et al, 2020;Bi et al, 2022b).…”

Section: Chemical Treatment For Light Oilsmentioning

confidence: 99%

Effects of oil characteristics on the performance of shoreline response operations: A review

Chen

Bi²,

Yue³

et al. 2022

Front. Environ. Sci.

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Marine oil spills are serious ecological disasters that have massive adverse impacts on the environment. The impacts are even worse once the spilled oil is stranded on a shoreline. A series of shoreline cleanup methods are deployed to remove spilled oil, but their performance can be affected by the stranded oil. This review therefore comprehensively investigates the characteristics of spilled oil on the shoreline and explores their effects on the effectiveness of shoreline response operations. First, the five basic groups of spilled oil (i.e., non-persistent light oils, persistent light oils, medium oils, heavy oils, and sinking oils) are discussed and each oil fraction is introduced. Three distribution scenarios of adhered oil on shorelines are also analyzed. The effects of oil characteristics, such as oil type, viscosity, evaporation, and composition, on the performance of chemical treatments, physical methods, and biodegradation are then discussed and analyzed. Finally, the article provides recommendations for future research on aspects of shoreline oiling prevention, quick responses, response tool sets, and other considerations, which may have significant implications for future decision-making and the implementation of shoreline cleanup to effectively remove stranded oil.

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Section: Chemical Treatment For Light Oilsmentioning

confidence: 99%

Effects of oil characteristics on the performance of shoreline response operations: A review

Chen

Bi²,

Yue³

et al. 2022

Front. Environ. Sci.

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“…Some studies indicate that asphaltenes can lower the WAT of oils. − Tinsley et al asserted that the introduction of asphaltenes reduces the temperature of wax crystallization, a phenomenon unaffected by asphaltene concentration but progressively attenuating with increasing wax content. Similar findings have been corroborated by Li et al, emphasizing that asphaltenes and compatible pour point depressants perform analogous functions, both significantly reducing the WAT. In addition, Ruwoldt et al found that both PPD and asphaltene had similar abilities to reduce WAT, but there was no direct correspondence between them.…”

Section: Introductionmentioning

confidence: 99%

“…However, research regarding the impact of asphaltenes on WAT has hitherto lacked a consistent consensus. Some studies indicate that asphaltenes can lower the WAT of oils. − Tinsley et al asserted that the introduction of asphaltenes reduces the temperature of wax crystallization, a phenomenon unaffected by asphaltene concentration but progressively attenuating with increasing wax content. Similar findings have been corroborated by Li et al, emphasizing that asphaltenes and compatible pour point depressants perform analogous functions, both significantly reducing the WAT.…”

Section: Introductionmentioning

confidence: 99%

Mechanistic Study on the Effect of Molecular Structure Characteristics of Asphaltene on the Synergistic Modification with EVA on Model Waxy Oil

Xia,

Shi,

et al. 2024

Energy Fuels

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The phenomenon of synergistic improvement of the low-temperature rheology of waxy oil between asphaltenes and polymer pour point depressants has been widely reported. However, there has been limited systematic investigation into the variations in synergistic effects among different asphaltenes and pour point depressants. In this study, asphaltenes were extracted from crude oils originating from four distinct blocks, and their impacts on the low-temperature rheological and exothermic characteristics of undoped/doped model waxy oils were comprehensively examined. Furthermore, by integrating the results of mesoscopic particle size testing with the asphaltene molecular structure, we have unveiled the underlying mechanisms governing the synergistic modification effect between asphaltene and pour point depressants. The results indicate that the more pronounced the asphaltene's individual modification effect on waxy oil, the weaker its synergistic modification interaction with pour point depressants becomes. Delving into the underlying reasons, we postulate that the modification capability of asphaltene is intricately linked to its capacity to participate in the crystallization of wax components, with the content of methylene and heteroatoms in its molecule directly influencing its cocrystallization capacity with wax. However, simultaneously, the presence of nonpolar units in asphaltene molecules can disrupt the polar adsorption of PPDs on their surfaces, consequently diminishing the synergistic modification effect between asphaltene and PPDs. The discovery of this phenomenon contributes to the refinement of the theoretical framework governing the cooperative modification of waxy oil by PPDs and asphaltenes, offering insights into the subsequent targeted development of highly efficient pour point depressants for waxy crude oil.

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“…and polymer-based asphaltene dispersants − (e.g., nonpolymer alkyls of polymethacrylate, comb-like polymers, etc.). Salicylic acid, phthalic acid, benzoic acid, dodecyl benzenesulfonic acid, dimethyl amide, polystyrene, maleate copolymer, etc., have been shown to act as asphaltene inhibitors. , Conventional methods of asphaltene content measurement and inhibitor selection utilize a large quantity of solvent, big glass vessels, and high temperature and pressure test methods and require qualified personnel for generating reliable data . Various methods have been developed for studying asphaltene precipitation and asphaltene deposition in conventional reservoirs, for example, microscopy, gravimetric analysis, viscosity measurement, filtration, electrical conductivity, light scattering, acoustic resonance, refractive index measurement, interfacial tension, heat transfer analysis, colloidal instability index, nuclear magnetic resonance, and gas chromatography coupled with mass spectrometry .…”

Section: Introductionmentioning

confidence: 99%

Perspectives on Microfluidics for the Study of Asphaltenes in Upstream Hydrocarbon Production: A Minireview

Sharma

Hartman

2022

Energy Fuels

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The utilization of microfluidics has generated deep insights into asphaltene precipitation mechanisms and oil−water emulsion stabilization. Agglomeration and precipitation of asphaltenes can cause flow assurance problems during the extraction and transportation of crude oil. Change in temperature, pressure, reservoir conditions, and solvents can change the local environment, leading to asphaltene precipitation. Understanding asphaltene properties and precipitation pathways becomes critical in devising mitigation methods, demulsifiers, and suitable conditions during hydrocarbon processing. Microfluidics has helped in high throughput measurement studies, understanding critical processing conditions, fast demulsifier screening, and the effect of solvent concentration on deposition, generating useful information for utilization at the point of resource extraction facilitating improved resource management. It has become possible to capture the porous, complex nature of reservoir formations and the interaction of chemicals during precipitation through integrated analytics and visualization studies available only through microfluidics. The use of droplet microfluidics, with optical microscopy and high-speed imaging to study the oil−water interface, has resulted in greater understanding of the role of asphaltenes in interfacial properties and emulsion stabilization. This minireview highlights the crucial aspects of microfluidics that have been used to understand physicochemical behavior and dynamics of asphaltene deposition. Some of the unique devices have been presented focusing on the key elements of microfluidics design, fabrication, and analysis, as the insight obtained from microfluidics strongly depends on the device design and the controllability of the experimental parameters. Successful implementation of microfluidics for efficient and controlled experiments, short analysis time scales and rapid screening, and generation of high-quality, reliable data that convey asphaltene deposition issues and interface behavior in emulsions shows the importance of microsystems for advancing knowledge in hydrocarbon production and processing.

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Asphaltene Inhibition and Flow Improvement of Crude Oil with a High Content of Asphaltene and Wax by Polymers Bearing Ultra-Long Side Chain

Cited by 11 publications

References 22 publications

Effects of oil characteristics on the performance of shoreline response operations: A review

Effects of oil characteristics on the performance of shoreline response operations: A review

Mechanistic Study on the Effect of Molecular Structure Characteristics of Asphaltene on the Synergistic Modification with EVA on Model Waxy Oil

Perspectives on Microfluidics for the Study of Asphaltenes in Upstream Hydrocarbon Production: A Minireview

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