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Synthesis Perovskite Catalyst for Chemical Looping Partial Oxidation and Optimization of Its Hydrodynamics Behavior in a Fluidized Bed Reactor

Beyzaei, Mohammad | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54522 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Ghotbi, Cyrus; Fotovat, Farzam; Ebrahimi, Hadi
  7. Abstract:
  8. In this thesis the perovskite catalyst of La0.7Sr0.3FeO3 with different percentages of kaolin and alumina boehmite as binders was synthesized to be used in the chemical looping partial oxidation process. To determine the best catalyst in terms of resistance against attrition, an attrition test was performed in a jet cup testing rig. The best catalyst in terms of resistance against attrition was perovskite catalyst 60% weight,25% weight kaolin and 15% weight alumina beohmite. Cold test of fluidized bed of the optimum catalyst in terms of resistance against attrition performed and minimum fluidization velocity, terminal velocity, flow regime type and Geldart type was obtained. The synthesized catalysts were characterized by means of X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) surface area and Field Emission Scanning Electron Microscope (FESEM). To determine the agglomeration tendency of the catalyst, DLS test was performed while TPD-O2 and TPD-NH3 tests were done to evaluate the oxygen adsorption and desorption of the catalysts, respectively. The hot test was performed at four temperatures of 750°C, 800°C, 850°C, and 900°C and the optimum reaction temperature was determined. Hot test of optimum catalyst at 750°Cwas performed in one cycle, and for 800°C, 850°C in four cycle and for 900°C was performed in ten cycles. To observe the structure of the catalyst after the hot test, the characteristics of the used catalyst were re-examined to determine the appropriate catalyst for use in a fluidized bed reactor
  9. Keywords:
  10. Chemical Looping Reforming ; Fluidized Bed Reactor ; Synthesis Gas ; Partial Oxidation ; Perovskite Catalyst ; Hydrodynamic Behaivoir

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