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

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

Dicho Stratiev  1 , Svetoslav Nenov  2 , Ivelina Shishkova  1 , Borislav Georgiev  1 , Georgi Argirov  1 , Rosen Dinkov  1 , Dobromir Yordanov  3 , Vassia Atanassova  4 , Petar Vassilev  4 , Krassimir Atanassov  3   4
Affiliations

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

Dicho Stratiev et al. ACS Omega. .

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.

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Conflict of interest statement

The authors declare no competing financial interest.

Figures

Figure 1
Figure 1
Relation of the VR feedstock colloidal instability index (CII) to the observed VR conversion at the LNB commercial hydrocracker.
Figure 2
Figure 2
Dependence of the VR aromatic structure (aromatic, resin + asphaltene fractions) content on the VR density for SRVR (a) and hydrocracked VTB (b).
Figure 3
Figure 3
Relation of saturate content with the CII for SRVRs having lower than 14% asphaltenes (a), and the relation of asphaltene content with the CII for SRVRs having more than 14% asphaltenes (b).
Figure 4
Figure 4
Relation of C5 to C7 asphaltenes for straight run (SRVR) and hydrocracked (VTB) vacuum residual oils.
Figure 5
Figure 5
Effect of conversion variation in the EBVR hydrocracking on the asphaltene density (a) and the relation of the C5 asphaltene density to the SRVR and VTB densities (b).
See this image and copyright information in PMC

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