Abstract
(Figure Presented) Asphaltenes were precipitated from a heavy residue and from its hydrotreated products at constant pressure, liquid-hourly space-velocity and hydrogen-to-oil ratio (100 kg/cm2, 0.25 h-1, and 5000 ft3/bbl, respectively). The effect of reaction temperature was studied in the range of 380-410°C. The experiments were carried out in a two fixed-bed reactor unit. The first test used a NiMo/γ-Al2O3 catalyst and the second test a NiMo/SiO2-Al2O3 catalyst. It was observed that the molecules of asphaltenes formed after reaction from the NiMo/SiO2-Al2O3 catalyst are smaller in size and less concentrated in metals than those originated from NiMo/γ-Al2O3 catalyst, which are more concentrated in nitrogen and the asphaltenes structure is more aromatic. The NiMo/SiO2-Al2O3 catalyst enhances metal removal in liquid products.
Original language | English |
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Pages (from-to) | 111-117 |
Number of pages | 7 |
Journal | Fuel |
Volume | 138 |
DOIs | |
State | Published - 15 Dec 2014 |
Keywords
- Asphaltenes
- Heavy petroleum
- Hydrotreating