Kinetic modeling of deep vacuum residue hydroconversion in a pilot scale continuous slurry reactor with recycle
Barbara Browning,Françoise Couenne,Tim Jansen,Maxime Lacroix,Pedro J. J. Alvarez,Mélaz Tayakout-Fayolle +5 more
- Vol. 4, pp 100063
TLDR
In this paper, the authors used data from a continuous pilot plant with recycle to test and extend an existing distributed lumped kinetic model, which includes results from 134 steady state experiments with a Heavy Iran VR, including some at very high conversion, and allowed sediment production rates to be quantified as well as sulphur removal in the form of H2S.Abstract:
Slurry phase hydroconversion is a developing technology with the potential to completely upgrade Vacuum Residues (VR). In this work we use data from a continuous pilot plant with recycle to test and extend an existing distributed lumped kinetic model. The new data includes results from 134 steady state experiments with a Heavy Iran VR, including some at very high conversion, and allows sediment production rates to be quantified as well as sulphur removal in the form of H2S. The purpose of the work is to study the impact of the deep conversion reaction conditions and feedstock on the reaction kinetics. The model uses nineteen distributed lumps to represent the heavy hydrocarbons undergoing hydroconversion and hydrodesulphurisation with VR defined as the boiling range > 525°C. Reaction rates are based on molar concentrations. Hydrogen consumption and sediment production are taken into account in the model, as well as vapour liquid mass transfer resistances and vapour-liquid equilibrium. Parameter estimation has been carried out and the model provides a good fit with the experimental data. The modelling exercise found that, at very high conversions, thermal reactions give way to a cascade of catalytic reactions. The model gave a moderate fit for hydrogen consumption rates, which are strongly dependent on feedstock. Accumulation of sediment at high conversions was identified and well represented and the description of hydrodesulfurisation rates as proportional to cracking rates was validated.read more
Citations
More filters
Journal ArticleDOI
A Review of Thermal Cracking, Hydrocracking, and Slurry Phase Hydroconversion Kinetic Parameters in Lumped Models for Upgrading Heavy Oils
Barbara Browning,Pedro Alvarez,Tim Jansen,Maxime Lacroix,Christophe Geantet,Mélaz Tayakout-Fayolle +5 more
Journal ArticleDOI
Hydrodynamic modeling of liquid-solid flow in polyolefin slurry reactors using CFD techniques – A critical analysis
TL;DR: In this article , a review of the hydrodynamics for polyolefin production in slurry reactors using CFD is presented, which can serve as a prerequisite for the design, scale-up, and optimization of any liquid-solid fluidization system.
Journal ArticleDOI
Study on molecular structure and association behaviour of heavy subfractions of vacuum residue by an improved separation method
TL;DR: In this paper , a reasonably improved separation method is adopted, and the multi-stage asphaltene extraction and the multiscale silica gel coupling separation are carried out innovatively, which achieves a high yield of 99% while ensuring the separation accuracy.
References
More filters
Journal ArticleDOI
A Review of Slurry-Phase Hydrocracking Heavy Oil Technology
TL;DR: The technologies of slurry-phase hydrocracking of heavy oil and the latest development of dispersed catalysts were reviewed in this article, where they showed high catalytic activity and good performance.
Journal ArticleDOI
A review of recent advances in catalytic hydrocracking of heavy residues
TL;DR: In this article, the most recent studies on hydrocracking reaction mechanisms are represented in this report. But, the authors focus on the most important issues related to conversion of non-conventional feeds such as vacuum residue and heavy oils.
Journal ArticleDOI
Kinetic modeling of hydrocracking of heavy oil fractions: A review
TL;DR: In this article, an exhaustive review of the scientific literature on kinetic modeling of heavy petroleum fraction hydrocracking is reported, including models based on the lumping technique, continuous mixtures, structure oriented lumping, and single event models.