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Plasma Processing of Light- and Heavy-Oil Asphaltenes
AbstractThe paper presents an analysis of the results of an experimental study of carbon materials obtained in a direct-current arc plasma from...
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Geochemistry of Biomarkers and Asphaltenes of Precambrian Organic Matter in the Aldan–Maya Depression (Siberian Platform)
AbstractThe study compares the elemental composition of asphaltenes with the parameters of hydrocarbon biomarkers and Precambrian insoluble organic...
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Transformations of Asphaltenes A1 and A2 in the Course of Atmospheric Residue Cracking
AbstractVarious conditions for the cracking of atmospheric residue from the Novokuibyshevsk Oil Refinery were considered and analyzed. Optimal...
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Geochemical Significance of the Molecular and Supramolecular Structures of Asphaltenes (A Review)
AbstractThis is a retrospective review of existing knowledge and major research areas related to the structure of asphaltenes and their applicability...
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Viscosity–Temperature Properties of Model Oil Systems Rich in Asphaltenes and Paraffins
AbstractThe paper describes a comparative assessment of viscosity–temperature curves for a number of model mixtures prepared from crude oil maltenes...
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ESR Spectroscopy in Geochemical Studies of Asphaltenes of Crude Oils from Tatarstan Oil Fields
AbstractESR spectra of asphaltenes from a series of crude oils from the Devonian and Carboniferous deposits of the South-Tatar Dome in Tatarstan with...
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Study of the Thermal Stability of Heavy Oil Resins and Asphaltenes by Thermogravimetry
AbstractThe thermal stability of resins and asphaltenes of naphthenic and methane heavy oils was studied by thermogravimetry. Based on the data of...
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Catalysis by Ion‑Exchange Resins Derived from Asphaltenes in the Salicylic Acid Acylation Reaction
Acidic and basic ion‑exchange resins were prepared by chemical modification of petroleum asphaltenes. The resulting products were characterized by IR...
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Adsorption of asphaltenes on multiscale porous alumina
Alumina catalysts are frequently used in refineries for the hydrotreatment of heavy petroleum fraction that are enriched in asphaltenes. The...
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Composition of the Thermal Cracking Products of Resins, Asphaltenes, and Their Mixture Using Methane Crude Oil as an Example
Abstract—The influence of the duration of thermal action on the composition of cracking products of resins, asphaltenes, and their mixtures isolated...
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Change in the Concentration of Stable Free Radicals and Vanadyl Complexes in the Products of Reaction of Petroleum Asphaltenes with Sulfuric Acid
The products from the reaction of petroleum asphaltenes with sulfuric acid under various conditions, accompanied by oxidation, sulfonation, and...
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Composition of Heavy Oil Resins and Their Effect on the Stability of Asphaltenes
Aspects of the content and distribution of heteroatomic components in resins were studied for the case of heavy oils of the Tatarstan and Samara...
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Characteristics of High-Molecular-Weight Components Obtained by Thermal Destruction of Oil Residue Asphaltenes in Supercritical Water
AbstractThe composition and characteristics of high-molecular-weight components of the thermolysis products of petroleum residue asphaltenes obtained...
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Changes in the Composition of Heavy Oil and the Structure of Asphaltenes upon Treatment with Isopropyl Alcohol
AbstractThe interactions of the components of heavy oil from the Zyuzeevskoye field (Republic of Tatarstan) and isopropyl alcohol (IPA) at...
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Investigating the Effect of Novel Nanofluid Solutions (TiO2/ZnO, TiO2/Al2O3 and ZnO/Al2O3) Containing Didodecyldimethylammonium Bromide (DDAB) Surfactant on Asphaltenes Deposits
As they constitute the heaviest and polar fraction of crude oils, asphaltenes affect undesirable precipitation issues during crude oil mining,...
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Effects of graphene and thermoplastic elastomer on tailoring the bulk properties of asphaltenes: an exploration from classical and quantum simulations
The modulation of bulk properties including the cohesive strength and the solubility of the asphaltenes, due to the inclusion of graphene nanosheets...
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Structural Changes in Asphaltenes upon the Cracking of Asphaltene–Maltene Model Mixtures:
AbstractThe influence of the amount of asphaltenes on the yield of distillate fractions in a cracking process and on the structural transformations...
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Abiotic Degradation of Petroleum Asphaltenes
The literature data on the abiotic degradation of asphaltenes are the subject of a systematic review. Such degradation may proceed under natural...
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Structural Transformations of Bitumen Asphaltenes after Ultrasonic Treatment
AbstractThe aggregation and sedimentation stability of asphaltene solutions in toluene treated in an ultrasonic field (field intensity, 18 W/cm 2 ;...
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Kinetic Regularities of the Kabachnik–Fields Reaction under Catalysis by Sulfonic Cation Exchangers Based on Petroleum Asphaltenes
AbstractStrongly acidic cation exchangers were obtained by the sulfonation and successive sulfonation and nitration of petroleum asphaltenes. The...
