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Electrokinetic Characterization of Asphaltenes and the Asphaltenes−Resins Interaction [PDF]

Energy & Fuels, 2003
The electrophoretic mobility of asphaltene particles formed by precipitation induced by the addition of n-heptane to asphaltene solutions in toluene was measured in water and in nonpolar media. Dispersed in water, the particles presented a negative electrophoretic mobility, whereas in toluene their mobility was positive and around 2.0 × 10-9 m2/V s ...
Marcia Dos Anjos De Sousa, Guilherme B. M. Neves, Sandra M. Saraiva, Gaspar González, Elizabete F. Lucas   +4 more
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ADSORPTION OF ASPHALTENE FUNTIONALITIES AND ASPHALTENE ON GOETHTTE

Fuel Science and Technology International, 1995
ABSTRACT Solid-stabilized water-in-oil emulsions cause many problems such as oil loss, fouling of a processing unit, and environmental hazard in the petroleum production and refining. The ability of finely divided solids to stabilize these emulsions is due to the adsorption of asphaltenes and other heavy constituents. This study presents the individual
Sang J. Choi, Young W. Jeon, Sug H. Yi
openaire   +2 more sources

Unraveling the Molecular Structures of Asphaltenes by Atomic Force Microscopy.

Journal of the American Chemical Society, 2015
Petroleum is one of the most precious and complex molecular mixtures existing. Because of its chemical complexity, the solid component of crude oil, the asphaltenes, poses an exceptional challenge for structure analysis, with tremendous economic ...
B. Schuler, G. Meyer, D. Peña, O. Mullins, L. Gross   +4 more
semanticscholar   +1 more source

Comprehensive Compositional and Structural Comparison of Coal and Petroleum Asphaltenes Based on Extrography Fractionation Coupled with Fourier Transform Ion Cyclotron Resonance MS and MS/MS Analysis

, 2020
A recently developed extrography separation method fractionates petroleum asphaltenes based on their ionization efficiency, which correlates with polarity, aggregation tendency, and asphaltene structure (single-core or island versus multicore or ...
Sydney F. Niles, M. Chacón-Patiño, Donald F. Smith, R. Rodgers, A. Marshall   +4 more
semanticscholar   +1 more source

Asphaltene Cake Properties

Energy & Fuels, 2008
One of the major problems encountered during the exploitation of the oil reservoir is the deposition of asphaltene in the porous rock near the wellbore. The crude oil asphaltene considerably reduces the rock permeability and, consequently, the oil production.
Montel, Valérie, Lazzeri Pordoy, Véronique, Brocart, B., Zhou, Honggang   +3 more
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New Molecular Insights into Aggregation of Pure and Mixed Asphaltenes in the Presence of n-Octylphenol Inhibitor

, 2020
Asphaltene stability can be perturbed during the oil production and transportation, leading to asphaltene precipitation and deposition.
Ali Ghamartale, S. Zendehboudi, N. Rezaei   +2 more
semanticscholar   +1 more source

NMR Spectroscopy Analysis of Asphaltenes

Energy & Fuels, 2019
In crude oil production and processing, asphaltene aggregation followed by precipitation is a major problem for the oil industry as it causes deactivation of catalysts, blocking pipelines, and deposition on the internal surface of the reservoirs, etc ...
S. Ok, T. Mal
semanticscholar   +1 more source

Effects of asphaltene concentration and asphaltene agglomeration on viscosity

Fuel, 2019
Abstract Asphalenes are regarded as the most polar and heaviest components in crude oil system. Their precipitation and agglomeration cause problems in oil recovery, production, and transportation. Asphaltenes are directly responsible for determining the viscosity of crude oil.
Xingxun Li, Pengcheng Chi, Xuqiang Guo, Qiang Sun   +3 more
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Resins and Asphaltenes of Light and Heavy Oils: Their Composition and Structure

Energy & Fuels, 2019
The complex of physicochemical methods of analysis (elemental analysis, cryoscopy in benzene, IR and ¹H NMR spectroscopies, structural group analysis, gas chromatography–mass spectrometry, and selective chemical cleavage of sulfide and ether bonds) is ...
T. V. Cheshkova, V. Sergun, E. Kovalenko, N. Gerasimova, T. Sagachenko, R. Min   +5 more
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Advances in Asphaltene Petroleomics. Part 1: Asphaltenes Are Composed of Abundant Island and Archipelago Structural Motifs

, 2017
For decades, discussion of asphaltene structure focused primarily on molecular weight. Now that it is widely accepted that asphaltene monomers are between ∼250 and 1200 g/mol, disagreement has turned to asphaltene architecture.
M. Chacón-Patiño, S. Rowland, R. Rodgers   +2 more
semanticscholar   +1 more source