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Mathematical modeling of a slurry bubble column reactor for hydrodesulfurization of diesel fuel: Single- and two-bubble configurations

Khadem Hamedani, B ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1016/j.cherd.2015.05.023
  3. Publisher: Institution of Chemical Engineers , 2015
  4. Abstract:
  5. In this investigation, a mathematical model for HDS of diesel fuel in a slurry bubble column reactor was developed. The model is based on the axial dispersion of the heterogeneous gas flow regime, which includes two various bubble classes: large (20±70mm) and small (1±10mm). By assuming only large or large plus small bubbles in the column, single- and two-bubble class mode equations are developed. The developed models to solving the mass and enthalpy balances from which the sulfur conversion was obtained that undertaken. The chemical kinetics over NiMoS/γ-Al2O3 catalyst were undertaken for the reaction rate of the involved reactions. The reactor operating conditions including pressure of 50bar at a temperature of 350°C, inlet superficial gas velocity of 0.1ms-1, and liquid velocity of 0.005ms-1 were chosen. The obtained modeling results revealed 99.53% and 98.95% of sulfur removal for single- and two- bubble classes, respectively. Furthermore, the results of the two models compared satisfactorily with experimental data from open literature, and a collation utilizing empirical data between the two hydrodynamic models demonstrated that the two-bubble model was more compatible with the empirical data than the single-bubble model. The results of modeling including temperature variations, other reactor characteristics and conversion of desired product were discussed throughout in this research in detail
  6. Keywords:
  7. Mathematical modeling ; Single-bubble class ; Diesel fuels ; Flow of gases ; Hydrodesulfurization ; Ionization of gases ; Mathematical models ; Reaction kinetics ; Sulfur ; Hydrodesulphurization ; Hydrodynamic model ; Operating condition ; Single bubbles ; Slurry bubble column reactors ; Superficial gas velocities ; Temperature variation ; Two-bubble class ; Bubble columns
  8. Source: Chemical Engineering Research and Design ; Volume 100 , August , 2015 , Pages 362-376 ; 02638762 (ISSN)
  9. URL: http://www.cherd.ichemejournals.com/article/S0263-8762(15)00174-4/abstract