What are the main differences between gasoline, diesel, paraffin oil, and residue hydrogenation?

The main differences between diesel and gasoline hydrogenation, wax oil hydrogenation, and residue hydrogenation lie in the reaction conditions and processing techniques: 1. Reaction temperature: Generally, the reaction temperature for residue hydrogenation is higher, usually ranging from 360 to 400 degrees Celsius； The reaction temperature for wax oil hydrogenation is slightly lower, generally ranging from 340 to 380 degrees Celsius ； The reaction temperature for the hydrogenation of gasoline and diesel is relatively lower, at around 300-360 degrees Celsius. 2. Reaction pressure: The reaction pressure for residue hydrogenation is the highest, usually ranging from 10 to 15 MPa ； The reaction pressure for wax oil hydrogenation is next, at around 8-12 MPa ； The reaction pressure for diesel and gasoline hydrogenation is relatively low, generally ranging from 5 to 10 MPa. 3. Hydrogen-to-oil ratio: Since residue contains more unstable and difficult-to-treat components, it requires a higher hydrogen-to-oil ratio, typically ranging from 1000 to 1500 (on a volume basis) ； The hydrogen-to-oil ratio in the hydroprocessing of paraffin oil is generally 600–1000 ； The hydrogen-to-oil ratio for diesel and gasoline hydrogenation is relatively low, at around 300-600. 4. Space velocity: Space velocity refers to the rate at which feed is introduced. The space velocity for residue hydrogenation is usually low in order to ensure sufficient reaction time, typically ranging from 0.3 to 0.5 hours^-1 ； The space velocity for wax oil hydrogenation is slightly higher, around 0.5–1.0 hour^-1 ； The space velocity for diesel and gasoline hydrogenation is the highest, typically ranging from 1.0 to 2.0 hours^-1. These differences are mainly due to the variations in raw material properties and product requirements. Residue contains more heavy components and impurities, requiring more intense hydrogenation conditions to improve its quality ； The raw materials for gasoline and diesel are relatively light, requiring milder reaction conditions. .

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