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64 vacuum gasoil has been operating at the Lysychansk refinery since 2004. Oil refining techniques also include the process of hydrocracking (HC). Among the known techniques for the secondary processing of heavy oil fractions (fuel oil) is the process of visbreaking. This is the process for deriving boiler fuels from tar. In the absence of a visbreaking unit to produce commercial fuel oil, most of the gasoil is used as a diluent to ensure its viscosity characteristics. This process makes it possible to utilize gas-oil fractions sparingly, as well as to obtain commercial fuel oil (tar) of lower viscosity, as well as additional volumes of vacuum gas oil. Thus, a given process of oil refining contributes to increasing the depth of its processing at refineries. That reduces the production of fuel oil and increases the production of vacuum gas oil [7]. Industrial processing of heavy oil raw materials (fuel oil) is practically non-existent. The reason is the complexity of thermal and even catalytic conversion of fuel oil. Most refineries have a weighted oil residue sent to the production of tar and bitumen. However, this residue also contains

Revealing the effect of catalyst concentration on the process of fuel oil refining using the technology of aerosol nano catalysis