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

Recent advances in instrumentation for high-field Fourier transform ion cyclotron resonance
mass spectrometry (FT-ICR MS) have enabled access to∼ 70 000 unique molecular …

Molecular composition analysis of petroleum and alternative fuels has been considered as
one of the greatest challenges in analytical chemistry. The rapid development of Fourier …

Despite extensive research, the molecular-level chemical characterization of asphaltenes, a
highly aromatic solubility fraction of petroleum, remains an analytical challenge. This fraction …

Direct “dilute and shoot” mass spectral analysis of complex naturally-occurring mixtures has
become the “standard” analysis in environmental and petrochemical science, as well as in …

A recently developed extrography separation method fractionates petroleum asphaltenes
based on their ionization efficiency, which correlates with polarity, aggregation tendency …

In this study, we investigated the stability of asphaltene adsorption structures at the oil–water
interface, focusing on the role of heteroatoms, by molecular dynamics simulations. We …

Multiscale characterization of asphaltenes and their extrography fractions titrated with n-
heptane was performed. Chemical characterization via FT-ICR MS and GPC ICP HR-MS …