Commercial Investigation of the Ebullated-Bed Vacuum Residue Hydrocracking in the Conversion Range of 55-93

Dicho Stratiev; Svetoslav Nenov; Ivelina Shishkova; Borislav Georgiev; Georgi Argirov; Rosen Dinkov; Dobromir Yordanov; Vassia Atanassova; Petar Vassilev; Krassimir Atanassov

doi:10.1021/acsomega.0c05073

Commercial Investigation of the Ebullated-Bed Vacuum Residue Hydrocracking in the Conversion Range of 55-93

ACS Omega. 2020 Dec 14;5(51):33290-33304. doi: 10.1021/acsomega.0c05073. eCollection 2020 Dec 29.

Authors

Affiliations

¹ LUKOIL Neftohim Burgas, 8104 Burgas, Bulgaria.
² University of Chemical Technology and Metallurgy, Kliment Ohridski 8, 1756 Sofia, Bulgaria.
³ University Prof. Dr. Assen Zlatarov, Professor Yakimov 1, 8010 Burgas, Bulgaria.
⁴ Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Bulgarian Academy of Sciences, Academic Georgi Bonchev 105, 1113 Sofia, Bulgaria.

Abstract

The LUKOIL Neftohim Burgas vacuum residue hydrocracking has increased the vacuum residue conversion from 55 to 93% as a result of a proper feed selection, optimal catalyst condition, and the use of a Mo nanodispersed catalyst. It was found that the feed colloidal instability index estimated from the feed saturates, aromatics, resins, and asphaltenes (SARA) data negatively correlated with the conversion. Correlations based on the use of the nonlinear least-squares method, which relates the density to the aromatic structure contents for the straight run and hydrocracked vacuum residues, were developed. Intercriteria analysis was applied to evaluate the relations between the different properties of the straight run and the hydrocracked vacuum residual oils. The density of the hydrocracked vacuum residue measured by dilution with toluene was found to strongly correlate with the conversion, Conradson carbon content, softening point, and Fraasss breaking point.