THE EFFECT OF SUNFLOWER OIL ADDITIVES AND FERROSPHERIC ASH FROM THE PULVERIZED COMBUSTION OF BROWN COAL ON THE KINETICS OF THERMAL CRACKING OF HEAVY OIL RESIDUES

doi: 10.65402/npnh.2025.11.006
UDC: 66.092-977
Received: 11.08.2025
Pages 42-53

Abstract. The effect of additives of sunflower oil (SO) and magnetic microspheres (MS) of fly ash on the kinetics of thermal cracking of heavy oil residues has been studied. The experiments were carried out in an autoclave at 400-500°C (30-120 min), analyzing the output of gases, oils, resins, asphaltenes and coke-like products. The reaction constants (k1-k10) are calculated using the direct search method based on the material balance. SO and MS additives reduce the yield of solid products and increase the yield of oils. This is explained by: 1) triglycerides included in SO increase colloidal stability by suppressing asphaltene aggregation; 2) unsaturated compounds of SO and its degradation products inhibit the recombination of macroradicals; 3) by the catalytic action of iron oxides included in MS. The greatest effectiveness of additives was noted for the residue obtained from heavy sulfur naphthenic aromatic oil. The results demonstrate the prospects of using spent sunflower oil and magnetic microspheres of ash and slag waste as additives for the thermal processing of heavy oil residues, allowing to reduce coke formation and partially solve the environmental problems of disposal of these wastes.

Key words: oil residues, fuel oil, atmospheric distillation residue, asphaltenes, resins, oils, thermal cracking, kinetics, reaction rate constant, sunflower oil, vegetable oil, microspheres, ferrospheres, fly ash microspheres, HPP ash, coke, coke formation, carbenes, carbides

For citation: Boyar S.V., Kopytov M.A. The effect of sunflower oil additives and ferrospheric ash from the pulverized combustion of brown coal on the kinetics of thermal cracking of heavy oil residues. Neftepererabotka i neftekhimiya. 2025, no. 11, pp. 42-53. (In Russ.) DOI 10.65402/npnh.2025.11.006