Results 191 to 200 of about 23,867 (262)

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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Potential Application of Fe2O3 and Functionalized SiO2 Nanoparticles for Inhibiting Asphaltene Precipitation in Live Oil at Reservoir Conditions

, 2021
Despite the numerous works devoted to the effect of nanoparticles on asphaltene formation, their potentials for controlling asphaltene precipitation in live oils at realistic pressure–temperature c...
Fatemeh Mahmoudi Alemi, S. A. Mousavi Dehghani, A. Rashidi, N. Hosseinpour, S. Mohammadi   +4 more
semanticscholar   +1 more source

Overview of Asphaltene Nanostructures and Thermodynamic Applications

, 2020
Previously, asphaltene science had been hindered by many significant uncertainties regarding molecular weight, molecular structure, and nanocolloidal characteristics in laboratory solvents and crud...
B. Schuler, Yunlong Zhang, Fang Liu, A. Pomerantz, A. Andrews, L. Gross, V. Pauchard, Sanjoy Banerjee, O. Mullins   +8 more
semanticscholar   +1 more source

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

Mechanisms of Asphaltene Aggregation: Puzzles and a New Hypothesis

, 2020
In petroleum science, asphaltenes are well-known as the most refractory fraction of crude oil and remain infamous for problems in production, transportation, and refining processes.
Yunlong Zhang, M. Siskin, M. Gray, C. Walters, R. Rodgers   +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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Investigating Change of Polydispersity and Rheology of Crude Oil and Bitumen Due to Asphaltene Oxidation

, 2020
This paper examines the effect of oxidation of asphaltene molecules on the overall polydispersity and rheology of a bituminous matrix.
Daniel J. Oldham, X. Qu, Hainian Wang, E. Fini   +3 more
semanticscholar   +1 more source

Advances in Asphaltene Petroleomics. Part 4. Compositional Trends of Solubility Subfractions Reveal that Polyfunctional Oxygen-Containing Compounds Drive Asphaltene Chemistry

, 2020
Asphaltenes have traditionally been conceived as highly aromatic, alkyl-deficient compounds enriched in pericondensed aromatic “island” motifs.
M. Chacón-Patiño, Donald F. Smith, C. Hendrickson, A. Marshall, R. Rodgers   +4 more
semanticscholar   +1 more source

Advances in Asphaltene Petroleomics. Part 3. Dominance of Island or Archipelago Structural Motif Is Sample Dependent

Energy & Fuels, 2018
Asphaltene structure is one of the most controversial topics in petroleum chemistry. The controversy is centered on the organization of aromatic cores within asphaltene molecules (single aromatic core, island and multiple aromatic core, archipelago) and ...
M. Chacón-Patiño, S. Rowland, R. Rodgers   +2 more
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Solution Properties of Asphaltenes

Langmuir, 2008
Ultracentrifugation has been used to produce asphaltene fractions of reduced polydispersity. The structure of these asphaltene fraction solutions has been investigated using viscosity and X-ray scattering (SAXS) measurements as a function of concentration.
Sébastien Simon, Loïc Barré, Thierry Palermo   +2 more
openaire   +3 more sources