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Density functional theory investigation of the contributions of π-π stacking and hydrogen bonding with water to the supramolecular aggregation interactions of model asphaltene heterocyclic compounds
ContextA complex supramolecular process involving electrostatic and dispersion interactions and asphaltene aggregation is associated with detrimental...
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Asphaltene precipitation modeling using PC-SAFT and Flory–Huggins theory considering polydisperse asphaltene description
To find an asphaltene thermodynamic model that can predict phase behavior and precipitation at reservoir and surface conditions and can consider...
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Molecular Basis of Asphaltene Stability
AbstractThe instability of asphaltenes in crude oils, manifested in their precipitation, is a major production issue that may arise both during the...
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An alternate characterization procedure of crude oils and modeling of asphaltene precipitation using PC-SAFT equation of state: estimation of asphaltene-rich phase maximum
In the present work, we propose an alternate characterization procedure to represent asphaltene precipitation using the Perturbed Chain-Statistical...
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Petroleum asphaltene-derived highly porous carbon for the efficient removal of pharmaceutical compounds in water
Highly porous carbons (PCs) were successfully developed through KOH chemical activation process from petroleum asphaltene for the efficient removal...
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Characteristics of Asphaltene Fractions Responsible for the Formation of Stable Water‑Oil Emulsions
Stable water-oil emulsions are formed due to the strong armor layer at the oil/water interface able to prevent the coalescence of water droplets in...
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Antioxidant Activity of Asphaltene and Resinous Components in a Magnetic Field
AbstractThe antioxidant activity of resin–asphaltene components isolated from two crude oils of different compositions was analyzed before and after...
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Interfacial properties of asphaltene–brine systems and analysis of adsorption kinetics: effects of ion and water injection for EOR
Asphaltenes are the heaviest crude oil components and active agents on the oil–water interface. Understanding the key parameters related to...
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Changes in the Structure of Asphaltene Molecules in the Process of Initiated Cracking of Tars
AbstractThe results of a study of asphaltenes isolated from the liquid products of tar cracking performed at a temperature of 500°C in the presence...
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Effects of addition of styrene-co-methacrylate ionomers neutralized with various monovalent cations on asphaltene dispersion in heavy oil
In this work we prepared poly(styrene-co-methacrylate) ionomers neutralized with three different monovalent cations and added these ionomers to heavy...
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Comprehensive performance analysis of kinetic models used to estimate asphaltene adsorption kinetics on nanoparticles
This research study aims to conduct a rigorous comparative performance analysis of four different kinetic models used to predict asphaltene...
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Regular Trends in Variation of the Asphaltene Composition and Structure in Dia- and Catagenesis
AbstractEvolutionary transformations of the composition and structure of asphaltenes in different types of organic matter (OM) of sediments and rocks...
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Photochemical reactor for selective hydrogenation of asphaltene molecules at room temperature in absence of a catalyst
Asphaltenes comprehend a mixture of fluorescent aromatic compounds and are responsible for many problems in the petrochemical industry during...
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Effect of combining rules on modeling of asphaltene precipitation
Asphaltene deposition causes serious problems in the oil industry and reduces oil recovery. Deposition happens as a consequence of asphaltene...
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Study on the Aggregation Behaviors of Asphaltene Derived from Low Temperature Coal Tar in Organic Solvents by Absorbance and Fluorescence Spectroscopy
AbstractThe aggregation behaviors of asphaltene derived from low temperature coal tar (CTA) in tetrahydrofuran (THF) and carbon tetrachloride (CCl 4 )...
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A New Investigation on Asphaltene Removal from Crude Oil: Experimental Study in Flow–Loop System Using Maghemite Nanoparticles
AbstractAsphaltene is the heaviest organic compound in crude oils that its precipitation and deposition cause many negative effects on oil...
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Application of Coal Tar Products and Evaluation of the Stability of Residual Marine Fuels
AbstractAlthough the quality of coal tar does not meet the demands for blended marine fuel, the properties of its components after processing are...
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Surface-Modified Iron Oxide as a Sorption Material for the Extraction of Asphaltenes
AbstractThe sorption behavior of asphaltenes and their aggregates in non-aqueous (toluene) solutions on a surface-modified “core−shell” sorbent based...
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Calculation of the Rate Constants of Thermal Cracking and Condensation Reactions of High-Sulfur Tar Asphaltenes
AbstractThe paper presents the results of a comparative analysis of the cracking products of three samples of high-sulfur tars obtained at a...
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Study of the Antioxidant Properties of Oils by the Voltammetric Method
AbstractA study of natural antioxidants in twelve oils of various compositions and in the resin-asphaltene components isolated therefrom was carried...
