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Reducing Sulfur Dioxide Using NANO-Structured Materials

Fasahat, Hossein | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 48933 (66)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Safekordi, Ali Akbar
  7. Abstract:
  8. In this research, absorption and oxidation catalytic scenarios were examined using previous studies in the field of SO2 removal. Nanostructures zeolite 13X, 5A zeolite, gamma alumina and activated carbon were purchased, then structure, function and adsorption isotherm of each adsorbent were evaluated in 5 concentrations of 250, 500, 750, 1000 and 1250 ppm of contaminants. Final results showed that zeolite 13X compared to other Nano-adsorbents has higher ability to SO2 absorption, and thus the final tests such as temperature and pressure evaluation were performed on the selected sorbent. To further evaluation, the absorbent curves based on two models of BDST (Bed depth service time) and Yoon-Nelson were examined. The results indicate that the zeolite13X show higher ability of SO2 absorption than activated carbon, while its substrate surface is less than activated carbon. Then, catalytic process was examined as a common industrial method to SO2 removal. In this regard, Vanadium pentoxide catalyst was placed on the base of zeolite 13X, after evaluating the structure, its function to remove these contaminants was examined in terms of two factors: catalyst loading and temperature. In this regard, these two factors were set as 3.54, 6.34, and 9.25% of Vanadium pentoxide and 250, 280 and 300 °C, respectively. The results showed that the optimal amount of catalyst loading was of 6%. Moreover, the highest SO2 to SO3 conversion obtained at 300 °C. The catalytic reaction mechanism of SO2 to SO3 conversion was also studied
  9. Keywords:
  10. Sulfur Dioxide ; Vanadium Pentoxide Catalyst ; Nanomaterials ; Pollution Removal ; Sulfur Trioxide ; Zeolite 13X

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