We review the existing literature on asphaltenes at various types of interfaces: oil–water, air–
water, gas–oil and solid–liquid, with more emphasis on the oil–water interfaces. We address …

Asphalthenes are typically defined as the fraction of petroleum insoluble in n-alkanes
(typically heptane, but also hexane or pentane) but soluble in toluene. This fraction causes …

Asphaltenes constitute high molecular weight constituents of crude oils that are insoluble in
n-heptane and soluble in toluene. They contribute to the stabilization of the water-in-oil …

Asphaltene finds a distinguished position in current research on liquid and solid
hydrocarbon fuels due to its self-aggregating nature. The presence of asphaltene in crude …

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

Asphaltenes, and their related issues, have been the focus of many literature investigations.
However, in-depth analysis of asphaltenes structure and its relation to asphaltenes stability …

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

Asphaltenes, as the heaviest and most polar fraction of petroleum, have been characterized
by various analytical techniques. A variety of fractionation methods have been carried out to …

The composition and structure analysis of coal tar is a very important basic issue. In the
process of preparing asphaltenes (insoluble in C5-C7 n-alkanes but soluble in hot benzene …

A new fractionation procedure was developed based on adsorption of asphaltenes onto
calcium carbonate. The fractions obtained were characterized by elemental analysis, Fourier …