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

Owing to their unique physical and chemical properties, transition metal compounds,
especially transition metal oxides, nitrides, carbides and sulfides, have been the subject of …

Asphaltenes, the most aromatic of the heaviest components of crude oil, are critical to all
aspects of petroleum use, including production, transportation, refining, upgrading, and …

Refineries must not only adapt to evolving environmental regulations for cleaner product
specifications and processing, but also find ways to meet the increasing demand for …

Modern production methods and environmental constraints demand chemical solutions. And
as oilfields age, the need for chemicals to ensure steady production increases. Production …

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

Fluorescence depolarization measurements are used to determine the size of asphaltene
molecules and of model compounds for comparison. Mean molecular weights of roughly …

Using a rejuvenator to increase the dose of reclaimed asphalt pavement (RAP) materials in
asphalt mixtures is a sustainable practice in the pavement industry. However, the …

The rotational correlation times of individual asphaltene molecules have been determined
using fluorescence depolarization techniques, addressing an active, long-standing …

The definition of the nonvolatile constituents of petroleum (ie, the asphaltene constituents,
the resin constituents, and, to some extent, part of the oils fraction insofar as nonvolatile oils …