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Desion an Appropriate Supported transition Metals Oxide Over Alumina Catalyst for Deep Oxidation of Cyclohexane in Air

Jafari, Masoumeh | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45436 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Khorashe, Farhad; Kazemini, Mohammad
  7. Abstract:
  8. Volatile Organic Compounds (VOCs) have become an important source of air pollution due to their extended use as solvents in many industrial processes. Aliphatic and aromatic VOC removal from contaminated air can be achieved by a variety of methods including catalytic oxidation, adsorption, and biological treatment. Catalytic oxidation is often the preferred process due to its low cost and high efficiency. Supported transition metal catalysts are effective and inexpensive catalysts for VOC removal from contaminated air. The objective of this project was to prepare low cost transition metal catalysts (Fe, Ni, Co, and Cu) supported on alumina for catalytic oxidation of cyclohexane (as a representative aliphatic VOC) from air. Various preparation methods including combined wet impregnation and deposition-precipitation, heterogeneous deposition-precipitation, homogeneous deposition-recipitation over alumina, as well as heterogeneous deposition-recipitation over a nano-structured alumina were used for catalyst synthesis. The prepared catalysts were subsequently used in a bench scale experimental reactor for oxidation of cyclohexane to CO2 and H2O. The catalysts were characterized by different techniques including XRD, SEM, and BET. The best catalyst performance was obtained for the Co/alumina catalyst that was prepared by deposition-precipitation which resulted in catalysts with better dispersion compared with those prepared by wet impregnation. An increase in the calcination temperature up to 600 oC also enhanced the catalyst performance
  9. Keywords:
  10. Catalytic Oxidation ; Transition Metal Oxides ; Alumina ; Volatile Organic Compound (VOC) ; Cyclohexane

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