Emulsions frequently encountered in petroleum production, include water-in-oil (W/O)
emulsions, oil-in-water (O/W) emulsions, and water-in-oil-in-water (W/O/W) emulsions, which …

Asphaltenes, the most aromatic of the heaviest components of crude oil, are critical to all
aspects of petroleum utilization, including reservoir characterization, production …

The Yen–Mullins model, also known as the modified Yen model, specifies the predominant
molecular and colloidal structure of asphaltenes in crude oils and laboratory solvents and …

Previously, asphaltene science had been hindered by many significant uncertainties
regarding molecular weight, molecular structure, and nanocolloidal characteristics in …

Asphaltenes are the heaviest components in crude oil. It is generally believed that
asphaltenes adsorbed at oil/water interface can form a protective layer to stabilize the water …

The asphaltene fraction of crude oil is commonly considered to be responsible for the
formation of highly undesirable, stable water-in-crude oil emulsions and rag layers. We …

The main objective of this study was to provide novel insights into the mechanism of
asphaltene aggregation in toluene/heptane (Heptol) solutions and the effect of alkylphenols …

Molecular characterization of asphaltenes by conventional analytical techniques is a
challenge because of their compositional complexity, high heteroatom content, and …

Many studies have indicated that asphaltenes have two hierarchical nanocolloidal species,
the nanoaggregate and the cluster of nanoaggregates. These two species, along with the …

Asphaltenes and maltenes are defined operationally by solubility (in, eg, heptane).
Asphaltenes self-associate in solution and form putative nanoaggregates composed of …