Crude Slate, FCC Slurry Oil, Recycle, and Operating Conditions Effects on H-Oil® Product Quality

Dicho Stoyanov Stratiev,Danail Dichev Stratiev,Simeon Ribagin,Evdokia Nikolaeva Sotirova,Krassimir Todorov Atanassov,Sotir Sotirov,Vassia Krassimirova Atanassova,Iliyan Venkov Kolev,Svetoslav Nenov,Dobromir Yordanov,Ivelina Kostova Shishkova,Ivan Petrov Petrov,Rosen Kocev Dinkov

doi:10.3390/pr9060952

Abstract

This paper evaluates the influence of crude oil (vacuum residue) properties, the processing of fluid catalytic cracking slurry oil, and recycle of hydrocracked vacuum residue diluted with fluid catalytic cracking heavy cycle oil, and the operating conditions of the H-Oil vacuum residue hydrocracking on the quality of the H-Oil liquid products. 36 cases of operation of a commercial H-Oil® ebullated bed hydrocracker were studied at different feed composition, and different operating conditions. Intercriteria analysis was employed to define the statistically meaningful relations between 135 parameters including operating conditions, feed and products characteristics. Correlations and regression equations which related the H-Oil® mixed feed quality and the operating conditions (reaction temperature, and reaction time (throughput)) to the liquid H-Oil® products quality were developed. The developed equations can be used to find the optimal performance of the whole refinery considering that the H-Oil liquid products are part of the feed for the units: fluid catalytic cracking, hydrotreating, road pavement bitumen, and blending.

Highlights

The ebullated bed vacuum residue H-Oil® hydrocracking proved commercially to be able of achieving 93% conversion of vacuum residue into gas (15.2%), naphtha (10.2%), diesel (47.2%), vacuum gas oil (25.1%), and unconverted hydrocracked vacuum residue, known as vacuum tower bottom product (VTB) (5.85%) [1,2]
VTB having density, and higher Concarbon hashigher been applied to decrease softeningcontent point possesses and Fraas break a higher softening point and it is more brittle undercutting of heavy vacuum gas oil (HVGO) in the vacuum and increase penetration to use this material as a feed for production of road asp distillation column has been applied to decrease softening®point and Fraas breaking point, In this study instead of undercutting H-Oil HVGO we explored the feasibility to and increase penetration to use this material as a feed for production of road asphalt [1,6]
Conclusions parameters including H-Oil® operating conditions and H-Oil® feed and liquid product properties were evaluated by the use of Intercriteria analysis

Summary

Introduction

The ebullated bed vacuum residue H-Oil® hydrocracking proved commercially to be able of achieving 93% conversion of vacuum residue into gas (15.2%), naphtha (10.2%), diesel (47.2%), vacuum gas oil (25.1%), and unconverted hydrocracked vacuum residue, known as vacuum tower bottom product (VTB) (5.85%) [1,2]. The naphtha, the diesel, the vacuum gas oil, and the VTB from H-Oil® are not finished marketable products and they require further processing. The vacuum gas oil (VGO) is catalytically cracked. Feed structure and operation severity which affected the H-Oil® VGO reactivity during its processing in the fluid catalytic cracking (FCC) [3,4]. The H-Oil® feed structure consisted of straight run vacuum residue, FCC slurry oil (SLO) and recycle of partially blended fuel oil (PBFO). The PBFO is prepared from around 70% VTB and 30% FCC heavy cycle oil (HCO)

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Conclusion