Production of Isotropic Coke from Shale Tar at Various Parameters of the Delayed Coking Process

This paper presents the results of studies on the production of coke at excess pressures of 0.15, 0.25, and 0.35 MPa with delayed coking of shale tar obtained by pyrolysis of oil shale in the Baltic Basin. To assess the quality of the resulting coke, properties such as the absolute density, yield of volatile substances, ash content, and total porosity were analyzed. The microstructure of the resulting coke was analyzed by X-ray diffraction, for which the evaluation criteria were the interplanar spaces d(002) and d(100) and the sizes of the Lc and La crystallites. The scanning electron microscopy (SEM) technique was used to confirm the results of the analysis of the formed structure of shale coke obtained earlier. The calcined samples were classified as cokes with an isotropic structure. In addition, the fractional composition of the obtained gasoline and gas oil fractions of delayed coking of shale resin was analyzed.

Automated summary

This paper presents the results of studies on the production of coke at different excess pressures with delayed coking of shale tar obtained by pyrolysis of oil shale, analyzing properties such as absolute density, volatile substances yield, ash content, and total porosity. The microstructure of the resulting coke was analyzed using X-ray diffraction and scanning electron microscopy (SEM), confirming an isotropic structure. In addition, the fractional composition of gasoline and gas oil fractions obtained from the delayed coking of shale resin was also analyzed.