Petroleum remains a complex and poorly understood material, despite its importance and ubiquity in modern life. And perhaps no fraction of that black gold is less well understood than the fraction ...

The blackness of crude oil comes from a dark, sticky fraction of compounds that make purifying petroleum tricky. To make purification easier, oil companies measure the concentration of these tarlike, ...

An evaluation found that when tuned, the Soave-Redlich-Kwong (SRK) and Peng-Robinson (PR) equations of state (EOS) can predict heavy oil densities and SARA fractions ...

A new cubic equation of state (EOS) predicts densities of Western Canadian heavy oils and their SARA (saturates, aromatics, resins, and asphaltenes) fractions. The method considers the SARA fraction ...

Petroleum is the most complex matrix in nature, constituted by many thousands of compounds, and presents an analytical challenge. As the world's remaining deposits of petroleum become heavier, it's ...