Abstract

The current state of the oil refining industry requires obtaining high-quality products that meet environmental requirements. An important issue is the deep processing of oil, as well as the use of oil waste as a raw material. The paper is devoted to study of the influence of various technological parameters during delayed coking of tar on the yield and physicochemical properties of hydrocarbon fuel components and solid-phase product - petroleum coke. As raw materials tar obtained from the Kumkol deposit (Kazakhstan) was applied. Heavy oil residues were coked at a temperature of 510 °C and an overpressure of 0.5 MPa in a laboratory coking unit. It was found that the group hydrocarbon composition of gasoline fraction is consisting mainly from isoparaffin (22.04%) and naphtenic compounds (22.15%), kerosene fraction from paraffin (19.42%) and isoparaffin (25.79%) and diesel fraction composition comprise paraffin (26.04). Raman scattering at 1165 cm−1 belong to CC aromatic and C = C region and indicates a high crystallinity of the coke structure. Coke is obtained with more developed specific surface 6.76 m2/g. The volume of the liquid product is 12.06 g (60.3%) and gas evolution amounted 5%.

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