Comparison of Empirical Models to Predict Viscosity of Secondary Vacuum Gas Oils
Dicho S. Stratiev,
Svetoslav Nenov,
Ivelina K. Shishkova,
Rosen K. Dinkov,
Kamen Zlatanov,
Dobromir Yordanov,
Sotir Sotirov,
Evdokia Sotirova,
Vassia Atanassova,
Krassimir Atanassov,
Danail D. Stratiev,
Liliana Todorova-Yankova
Affiliations
Dicho S. Stratiev
LUKOIL Neftohim Burgas, 8104 Burgas, Bulgaria
Svetoslav Nenov
Department of Mathematics, University of Chemical Technology and Metallurgy, Kliment Ohridski 8, 1756 Sofia, Bulgaria
Ivelina K. Shishkova
LUKOIL Neftohim Burgas, 8104 Burgas, Bulgaria
Rosen K. Dinkov
LUKOIL Neftohim Burgas, 8104 Burgas, Bulgaria
Kamen Zlatanov
Department of Mathematics, University of Chemical Technology and Metallurgy, Kliment Ohridski 8, 1756 Sofia, Bulgaria
Dobromir Yordanov
Laboratory of Intelligent Systems, Department of Industrial Technologies and Management, University Prof. Dr. Assen Zlatarov, Professor Yakimov 1, 8010 Burgas, Bulgaria
Sotir Sotirov
Laboratory of Intelligent Systems, Department of Industrial Technologies and Management, University Prof. Dr. Assen Zlatarov, Professor Yakimov 1, 8010 Burgas, Bulgaria
Evdokia Sotirova
Laboratory of Intelligent Systems, Department of Industrial Technologies and Management, University Prof. Dr. Assen Zlatarov, Professor Yakimov 1, 8010 Burgas, Bulgaria
Vassia Atanassova
Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Bulgarian Academy of Sciences, Academic GeorgiBonchev 105, 1113 Sofia, Bulgaria
Krassimir Atanassov
Laboratory of Intelligent Systems, Department of Industrial Technologies and Management, University Prof. Dr. Assen Zlatarov, Professor Yakimov 1, 8010 Burgas, Bulgaria
Danail D. Stratiev
Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Bulgarian Academy of Sciences, Academic GeorgiBonchev 105, 1113 Sofia, Bulgaria
Liliana Todorova-Yankova
Department of Mathematics, University of Chemical Technology and Metallurgy, Kliment Ohridski 8, 1756 Sofia, Bulgaria
This work presents characterization data and viscosity of 34 secondary vacuum gas oils (H-Oil gas oils, visbreaker gas oils, and fluid catalytic cracking slurry oils) with aromatic content reaching up to 100 wt.%. Inter-criteria analysis was employed to define the secondary VGO characteristic parameters which have an effect on viscosity. Seven published empirical models to predict viscosity of the secondary vacuum gas oils were examined for their prediction ability. The empirical model of Aboul-Seud and Moharam was found to have the lowest error of prediction. A modification of Aboul-Seoud and Moharam model by separating the power terms accounting for the effects of specific gravity and average boiling point improves the accuracy of viscosity prediction. It was discovered that the relation of slope of viscosity decrease with temperature enhancement for the secondary vacuum gas oil is not a constant. This slope increases with the average boiling point and the specific gravity augmentation, a fact that has not been discussed before.
