Home – Home – Jornals – Chemistry for Sustainable Development 2021 number 6

During recent years, in view of a decrease in the reserves of light oil, much attention has been paid to the ways for involving high-sulphur heavy hydrocarbon feedstock into processing. Processing of these raw materials will allow obtaining additional amounts of light distillates. Results of the studies of high-sulphur vacuum residue cracking at a temperature of 500 °C with varied process duration are presented. Typical features of the changes in the material and fractional composition of cracking products are demonstrated. Changes in the group composition of the sulphur-containing compounds of oils are investigated depending on the thermal treatment time; the kinetic regularities of the formation and destruction of the derivatives of thiophene, benzo- and dibenzothiophene are established. Changes in the structure-group parameters of resins and asphaltenes during cracking are calculated. It is shown that the cracking of resins and asphaltenes is accompanied by the formation of a large set of low-molecular-weight sulphur-containing compounds getting into cracking products. The data obtained will provide an improved understanding of thermal transformations of sulphur-containing compounds in vacuum residues during cracking.