What does the viscosity of slurry depend on?
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Lately, the yield of my catalytic unit has been low: the light product yield is around 84%, while the yield of gasoline plus liquefied gas is about 55%. When the temperature at the bottom of the distillation tower is increased, the viscosity of the oil slurry rises to around 40. Could someone help analyze the reasons behind this phenomenon?
The yield of the catalytic unit is highly dependent on the reaction, and it is related to the separation and removal of gases from reprocessed oil and diesel. When the temperature at the bottom of the distillation tower is high, the slurry becomes heavier, and its viscosity increases naturally.
The light collection rate is 84%, which is still too high; I’m not satisfied. After increasing the temperature at the bottom of the fractionation tower, the viscosity of the slurry rose to around 40; checking the amount distilled before 350 degrees shows that it is definitely less. As the content of polycyclic aromatic hydrocarbons and gums in the slurry increases, its viscosity rises as well.
The raw materials I have here are of good quality; the slag inclusion ratio is around 10%. Vacuum distillation oil is used very little in the blending of crude oil, and all the feedstock oil used in catalytic processes is wax oil obtained from vacuum distillation – no wax oil is purchased from external sources
No matter how good your raw materials are, as the oil becomes heavier, its viscosity generally increases
As the bottom temperature rises, the light components move upward while the heavy components become heavier, which in turn increases viscosity. Catalysis does suffer some degree of degradation; relatively speaking, processes such as hydrocracking are better as they result in lower losses.
The main factors are two: the quality of the raw materials and the degree of reaction depth.
We keep the temperature at the bottom of our distillation column below 340 degrees
This yield isn’t very high; we have another setup that achieves a yield of 88%
84% reduced charge; the reduced charge applies only to gasoline + diesel. 84% isn’t high; I’ve seen units with a yield of 82% for solid products and 93% for liquid products.
Sorry, by \"light hydrocarbons\" we mean liquefied gas, as well as gasoline and diesel; we refer to these as liquid hydrocarbons