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Study on the Kinetics of Uranium Adsorption in the Stirred Reactors, and Search for the Scalable Kinetic Models for This

Hashemi Oalya, Ali | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43008 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Otukesh, Mohammad; Khanchi, Alireza
  7. Abstract:
  8. One of the main uranium separations of ore that uranium percent application of enhanced design strategies in the industrial cracking furnaces are of practical interest for oil, gas and petrochemical industries. For such engineering purposes the exact simulation of temperature, species concentration and flow fields in the furnace is essential. In this paper, a study was performed to simulate 3D flue gas flow pattern, temperature and species concentration field in the radiation section of an industrial cracking furnace using the computational fluid dynamics (100-500) ppm technique. The steady-state Reynolds Averaged Navier–Stokes (Resin in pulp)equations were solved, in a finite volume scheme, for a turbulent premixed flow applying the renormalization group version of the k model, together with detailed combustion kinetics method of KEE (including 17chemical components and reversible reactions) for methane-hydrogen-air ixture. In the first simulation the classic combustion regime which has been used widely in different industries, applying a simple combustion mechanism is studied.Inthe econdsimulationwithminorchangesinoperating conditionssuch asreduction of inlet fuel and increasing oxidant temperatureanewcombustionregimewas studied. In the second simulation due to our requirement to have a high precision about pollutants production a detailed combustion kinetics which has been named
    the method of Helfferish is applied.
    In general, theresults ofthissimulationshowedthatthe newcombustionregime hasmany advantagescomparedtotraditionalcombustionregimeandifit replaces in various industries will leadtoreducefuel consumption, increasethermal efficiency, decrease pollutants productionand eliminatehot spotsof thefurnacewallandreactor tubes
  9. Keywords:
  10. Ion Exchange ; Scalability ; Uranium Adsorption ; Stirred Tanks

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