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Mathematical Modeling of Slurry Reactor for Direct Synthesis of Dimethyl ether from Syngas and Carbon Dioxide

Papari Moghaddam Borazjani, Sadegh | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42464 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Kazemeini, Mohammad
  7. Abstract:
  8. In this study, both axial dispersion and perfect mix mathematical model to simulate a three-phase slurry bubble column reactor for direct synthesis of dimethyl ether (DME) from syngas and CO2 is developed. This large-scale reactor is modeled by using mass and energy balances, catalyst sedimentation and single-bubble as well as; two-bubbles’ class flow hydrodynamics. A comparison between the two hydrodynamic models with pilot plant experimental data from the literature showed that heterogeneous two-bubbles flow model is in better agreement with the experimental data than homogeneous single-bubbles gas flow model. Also, by investigating the heterogeneous gas flow and axial dispersion model for small bubbles as well as; the large bubbles and slurry (i.e.; including paraffins and the catalyst) phase, the temperature profile along the reactor was obtained. A comparison between isothermal and non-isothermal reactors revealed no obvious performance difference between them. The optimum value of rector diameter and height obtained at 7 and 50 meters; respectively. The effects of operating variables on the axial catalyst distribution, DME productivity and CO conversion were also investigated in this research
  9. Keywords:
  10. Dimethyl Ether ; Synthesis Gas ; Modeling ; Optimization ; Slurry Reactors ; Direct Synthesis ; Homogeneous Phase ; Heterogeneous Phase ; Industrial Scale

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