Factors affecting the properties of slurry oil

1. High reaction depth 2. Poor quality of feed oil 3. High temperature at the bottom of the distillation tower

As the feedstock becomes heavier, the specific gravity of the oil slurry increases, the yield of the oil slurry rises, the amount of solids decreases relatively, and the viscosity increases. At the same time, the boiling range of the oil slurry shifts toward higher temperatures; both the initial boiling point and the temperature at which 10 ml of distillate is obtained increase. Under the same degree of reaction, the oil slurry generally becomes heavier, with an increased density and viscosity

1. Poor quality of raw materials 2. Excessively high bottom temperature of the tower 3. Low circulation rate of the oil slurry 4. Leakage of fluid from the centrifuge 5. Suboptimal conditions in electrodesorption 6. Poor quality of scale inhibitors

1. Deterioration in the properties of the raw materials 2. High degree of reaction depth 3. Poor operating conditions of the cyclone separator 4. Excessively high temperature at the bottom of the distillation tower 5. High liquid level at the bottom of the distillation tower, resulting in long residence time 6. Poor performance of the slurry scale inhibitor

1. Properties of raw materials: Changes in the physical properties of the catalytic raw materials directly affect the distribution of the product as well as its quality. The density, boiling range, group composition, structural group composition, heavy metal content, as well as the levels of resin and asphaltene, and residue content of the raw materials all have a direct impact on the properties of the oil slurry product. The polycyclic aromatic hydrocarbons in the feedstock are themselves high-molecular-weight components; throughout the catalytic reaction process, they basically do not participate in the reactions and instead affect the reactions of other hydrocarbons. Polycyclic aromatic hydrocarbons either end up as coke or get concentrated in the catalytic slurry; therefore, the aromatic content in the feedstock directly affects the density of the catalytic slurry. The higher the content of heavy metals in the raw materials, the higher their concentration in the slurry; this enhances the coking tendency of the slurry and also increases its density. 2. Reaction depth: An excessive reaction depth increases the yields of gas phase and coke, reduces the yield of light oils, causes heavier components to accumulate in the slurry, and increases the density of the slurry. 3. Fractionation operation: The control of the temperature at the bottom of the fractionation tower affects both the properties of the slurry and the reaction conditions for polymerization and coking of the slurry; moreover, the selection of an appropriate operating temperature at the bottom of the tower is directly related to the compositional properties of the slurry. The higher the bottom temperature of the fractionation tower, the greater the tendency for the slurry to coking. And this coking rate will increase geometrically. Typically, the average temperature during extraction is below 330°C. The amount of slurry discharged has a direct impact on the properties of the slurry. 4. Catalyst: Whether the catalyst itself possesses the ability to crack heavy crude oils has a direct impact on the properties of the oil slurry. 5. Other influencing factors (non-primary): the effectiveness of scale inhibitors, whether catalyst additives are used, etc. Please point out any mistakes above.