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Synthesis and Evaluation of Nanostructured Photocatalysts for Oxidation Desulfurization of Liquid Fuels

Abdollahi Arpanahi, Moslem | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54819 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Khorasheh, Farhad; Ghotbi, Sirous; Larimi, Afsaneh
  7. Abstract:
  8. In recent decades, desulfurization processes have become essential to decrease environmental pollution due to the emission of sulfur from fuels. In this study, in order to desulfurize liquid fuel, a model fuel (normal heptane) was investigated under visible light ) 350-watt sodium lamp(, using H2O2 as oxidant and methanol as a solvent in the presence of Cu-C-TiO2 nanostructure. C-TiO2 was synthesized by the hydrothermal method. In order to modify and improve the properties, we doped the copper metal by impregnation method with different loading of Cu. Experimental results exhibited the highest activity among samples attributed to 0.5% Cu-C-TiO2 Which caused 98.27% degradation of DBT after 2 hours. In addition, if the concentration of dibenzothiophene was less than 100 ppm, we achieved 100% degradation. Increased photocatalytic activity of 0.5% Cu-C-TiO2 can be attributed to factors such as decreased bandgap, increased visible light absorption, increased surface area, decreased recombination between hole and electrons.X-ray diffraction, N2 adsorption, scanning electron microscopy, transmission electron microscopy, and UV–Vis diffuse reflectance spectroscopy، photoluminescence spectroscopy ، Fourier-transform infrared spectroscopy used to see the reason for the positive impact of Cu on the photocatalytic activity of C-TiO2
  9. Keywords:
  10. Photocatalyst ; Titanium Dioxide ; Visible Light ; Desulfurizing ; Liquid Fuels ; Hydrothermal Method

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