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Mathematical Modeling of Airlift Slurry Reactor for Removal of Hydrogen Sulfide (Hydrodesulfurization)

Khadem Hamedani, Behnam | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44640 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Yaghmaei, Soheila; Mashayekhan, Shohreh
  7. Abstract:
  8. After carbon and hydrogen the most existed element in crude oil is sulfur which is appeared as sulfur compound in fossil fuels. Sulfur might be converted to hydrogen sulfide by hydrodesulphurization operation. The increasing demand for sulfur removal has required large improvements in hydrodesulphurization technology.Most hydrodesulphurization processes use fixed-bed reactors, however, there are still some disadvantages with performing hydrodesulphurization in these reactors. The most important one is high exothermic nature of hydrodesulphurization process which cause some problems for catalyst in these reactors and decrease the performance of catalyst. In order to solve the temperature problems caused by hydrodesulphurization process, three phase reactors such as slurry reactors which are utilized a lot in the advanced technology of gas-to-liquid processes and had a better temperature control in comparison to fixed bed reactors. In the present work, hydrodesulphurization of diesel in a slurry reactor with a mathematical modeling was studied. For this purpose, first the important and required reactions of hydrodesulphurization process are specified, also the governing equations of slurry reactor were categorized. Then, by using numerical method of explicit discretization, the equations were expanded and solved by means ofGauss-Seidel iterative method with relaxation in MATLAB 2010b software environment. Ultimately, results of the modeling which included temperature changing, other reactor characteristics and conversion of desired product of this operation, were discussed in details through our research
  9. Keywords:
  10. Mathematical Modeling ; Numerical Solution ; Hydrodesulfurization ; Slurry Reactors ; Gauss-Sidel

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