Modeling of asphaltene aggregates structure and deposition

Gmachowski, Lech; Paczuski, M.

doi:10.1016/j.colsurfa.2015.08.021

Cited by 4 publications

(4 citation statements)

References 20 publications

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“…By measuring changes in the turbidity of visible radiation, 740 nm, the kinetics of the flocculation process of asphaltenes precipitated with isooctane from the asphalt solution in toluene was investigated [17]. Laboratory research confirmed state of aggregation of asphaltenes in crude oil and crude with pyrolysis oil (PO) component [18,19]. A significant influence of the shear stresses on the aggregation of asphaltene molecules was found.…”

Section: Crude Oil Dispersive Structurementioning

confidence: 99%

Modification of Asphaltene Dispersions in Crude Oil

Paczuski

2024

Physicochemistry of Petroleum Dispersions in Refining Technology

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The physical structure of asphaltene dispersion in crude oil is important from the point of view of refining technology and can subject to modification, for example, using an aromatic component, such as pyrolysis oil. The lab results were verified in industrial tests in the atmospheric-vacuum distillation (AVD) process of crude oil. Positive test results made it possible to use pyrolysis oil on an industrial scale as the component, favorably changing crude oil’s dispersion structure and properties. The implementation of a new method of distillation of crude oil partially confirmed the expected effects and revealed new aspects of technology modification. In the course of research on this type of petroleum dispersion, carried out for the refining industry, several patented solutions have been developed, some of which have been successfully applied in the industry.

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Section: Crude Oil Dispersive Structurementioning

confidence: 99%

Modification of Asphaltene Dispersions in Crude Oil

Paczuski

2024

Physicochemistry of Petroleum Dispersions in Refining Technology

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“…[16][17][18][19] Direct quantication of functional groups in asphaltenes in heavy crude oil and the effect of dispersants and additives on their blends have also been studied using UV spectroscopy. [20][21][22][23] UV studies have shown that the aromatic moiety through p-p* and dipole interactions, is one of the dominant contributors to asphaltene self-association 24 and have been used to match weathered oil with source of spill 25 as well as determine compositional changes in persistent and photochemically transformed water-soluble constituents of industrial crude oil and natural seep oil in seawater. 26 Absorption maxima and absorption ratio derived from UV measurements have been used [27][28][29][30] to differentiate between SARA fractions, fresh oil, and degraded samples as well as determine the probable type of hydrocarbon in seawater.…”

Section: Introductionmentioning

confidence: 99%

Time-dependent multivariate and spectroscopic characterisation of oil residue in Niger Delta soil

et al. 2022

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“…For example, the impact of chemical and physical fouling mechanisms is aggregated into the activation energy in the original threshold model . Crude oil quality models, in contrast, are dominated by sophisticated attention on asphaltene stability, but gaps exist to consider the interactions between the process conditions and a more comprehensive set of crude oil properties in robust field-scale fouling modeling. ,− …”

Section: Introductionmentioning

confidence: 99%

Impact of Centrifuge-Separated Fractions from Light Tight Oils on the Propensity and Mechanisms of Fouling, and Improved Crude Oil Fouling Potential Prediction Model

Terán

Patel

et al. 2020

Energy Fuels

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Processing of light tight oils (LTOs) and their blends is challenged with their high fouling propensity. In this study, their fouling potential was attributed to fractions from centrifuge-accelerated settling. A small solid fraction comprising lower than 0.5% of the volume was found to bear a majority of the fouling potential of a set of LTOs. The chemical analysis of these centrifugeseparated solids from an LTO blend resembled that of the field deposits from the crude unit furnace tubes processing the same blend, further validating their impact in crude unit fouling. The liquid fraction of the LTOs affected the fouling potential in two aspects. First, the same solid fraction separated form an LTO presented varying fouling potency when mixed with different liquid fractions from different crude oils. Second, paraffin crystals led to a flocculated structure and impaired solid settling. Time-of-Flight Secondary Ion Mass Spectrometry analysis of lab-generated thin fouling films unmasked the complex and intertwined fouling mechanisms of different LTO blends, which explained the unsatisfactory prediction quality of crude oil fouling potential based on solid volume fraction alone and emphasized the importance to evolve from the conventional fouling management approach focusing solely or heavily on asphaltene stability. Finally, a nonlinear model considering the two-class solids loading input and the Fourier transform infrared fingerprint of the crude oil was developed to predict the fouling potential of crude oils. The predictive power of the model was corroborated in the field at various refinery sites processing crudes with fouling potentials ranging from low to severe. As an integral component of our field-deployable predictive modeling platform, the fouling potential model helped refineries quickly and reliably predict crude oil instability and fouling severity, the associated processing issues, the likely locations where they may be manifested, and the recommended actions for mitigation. Hence, feed-forward optimization and reliability improvement of the crude fractionation unit process were made possible.

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Modeling of asphaltene aggregates structure and deposition

Cited by 4 publications

References 20 publications

Modification of Asphaltene Dispersions in Crude Oil

Modification of Asphaltene Dispersions in Crude Oil

Time-dependent multivariate and spectroscopic characterisation of oil residue in Niger Delta soil

Impact of Centrifuge-Separated Fractions from Light Tight Oils on the Propensity and Mechanisms of Fouling, and Improved Crude Oil Fouling Potential Prediction Model

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