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 …

Asphaltene is the heaviest and most polar fraction of crude oils, which is usually defined as
a solubility class, soluble in light aromatics, benzene and toluene, and insoluble in paraffins …

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

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 …

The molecules in petroleum asphaltenes follow a molecular structure continuum similar to
the rest of the oil but differ in the formation of nanoaggregates in solution. The nature of the …

Asphaltenes, complex aromatic compounds from various carbonaceous sources, could be
obtained by solvent dissolution, filtration and adsorption. It was difficult to clarify the …

A new strategy has been developed for characterization of the most challenging complex
mixtures to date, using a combination of custom-designed experiments and a new data pre …

Asphaltenes have traditionally been conceived as highly aromatic, alkyl-deficient
compounds enriched in pericondensed aromatic “island” motifs. This structural definition …

Heavy oil and bitumen drive the leading energy supply in Canada. Several techniques,
including in situ thermal methods and mining, have been applied to the recovery of these …

Chemical characterization of petroleum is a challenging task due to its inherently complex
nature. For example, crude oil is believed to have as many or more compounds than the …