LAUSR

Thermal analyses of Yarega heavy crude oil, its atmospheric residue, vacuum residue and asphaltenes were carried out for better understanding of the pyrolysis process of the high-molecular weight hydrocarbons. The degree of influence of asphaltenes on the pyrolysis was determined. Kinetic and thermodynamic parameters of the pyrolysis of high-molecular weight liquid oil systems were also investigated. Activation energy and pre-exponential factor were calculated. It was found that the degree of conversion depends on the average molecular weight of the liquid oil systems. The higher the molecular weight, the lower the final degree of conversion. It was determined that the activation energy of pyrolysis of the liquid oil systems is higher than that of the asphaltenes obtained from these systems. This process occurs due to deasphalting of the leaching of a solvate layer as a result of the existence of two phases (α-, β-phase). β-phase is not soluble in the low-molecular weight hydrocarbons, but partially broke...