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Design and Manufacture of Fluidized Bed Reactor in Pilot Scheme for Multiple Chemical Reactions at High Temperature and
Reduction of MnO2 to MnO by CO in Fluidized Bed Reactor

Shakeriyan, Mojtaba | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41027 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Halali, Mohammad; Hakim, Manuchehr
  7. Abstract:
  8. In this study designing and manufacturing of high-temperature fluidized bed reactor were performed. These reactors are based on the contact of fluid with solid particles and balancing the weight of the solid materials. In the manufactured reactor, reduction of manganese de oxide to manganese oxide was done by carbon monoxide produced from incomplete combustion. The most important parameters in the reduction rate are: bed temperature and reduction gas concentration. Materials were injected into the reactor under the pressure of 1.13 mmHg and temperature of 787 ℃ in the bed depth of 4 cm for 2 hours and then the product was removed. XRD patterns showed that the dominant phase in the product was MnO and comparing the data for raw materials and gas analyses before and after the reaction, obtained from gas chromatography, showed a significant increase in the reduction gas percentage in exhaust gas with respect to input gas. Also comparing the row and product peaks showed no trace of cryptomelane (K2-xMn8O16 ) in the product and all row materials were reduced to MnO (complete reduction) or Mn3O4 (incomplete reduction). In this reactor manganese oxide with high purity and uniform particle size at temperatures of about 787 ℃ was produced
  9. Keywords:
  10. Manganese Oxide ; Fluidized Bed Reactor ; Reduction (Chemistry) ; Manganese Dioxide Reaction

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