| 초록 |
Recently, our concern was how to upgrade the heavy oils such as pyrolysis fuel oil, vacuum residual oil(VR), extra heavy oil and bitumen. These heavy oils contain heavy hydrocarbon compounds, resins, and asphaltenes that contain carbon chains more than sixty carbon atoms. High content of heavier fractions corresponds with high molecular weight, viscosity, and boiling point. The hydrocarbons in the VR are forms of crude oil that are extremely dense and viscous, with a consistency ranging from that of molasses for some extra-heavy oil to as solid as wax at room temperature, making extraction difficult. They often contain high concentrations of sulfur and heavy metals, such as nickel and vanadium, which interfere with refining processes. In this talk, I will review the recent studies that we have conducted regarding aquathermolysis and demetallization of heavy oil and vacuum residual oil. |
