Loading...

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

Salehian, Siamak | 2023

87 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55834 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Ghotbi, Sirous; Larimi, Afsaneh Sadat
  7. Abstract:
  8. In recent decades, desulfurization processes have become necessary to reduce environmental pollution due to fuel sulfur emissions. In this research, in order to photocatalytic oxidation desulfurization of liquid fuel, a model fuel (normal octane) under visible light irradiation of 250 W sodium lamp, using H2O2 oxidant and methanol solvent in the presence of BMO/Fe@MIL(x%) composite. BMO and Fe@MIL were investigated. From the tests, X-ray diffraction, scanning and transmission electron microscope imaging, absorption and desorption of nitrogen gas, infrared spectrometer-Fourier transform, visible-ultraviolet reflection spectroscopy, optical radiation spectroscopy and vibration magnetometer in order to evaluate physical properties. and chemically synthesized samples were used. The experimental results showed that the best photocatalytic activity was related to 75%-BFM, which produced up to 99.7% degradation for DBT within 90 minutes of reaction (60 minutes of oxidation reaction in the presence of light and 30 minutes of physical absorption without light), which was more than BMO Efficiency increased by 52.7%. The increase in photocatalytic activity of 75%-BFM can be attributed to factors such as reducing the energy of the band gap, increasing the absorption of visible light, inhibiting the recombination of electron-hole pairs, and increasing the surface area. The 75%-BFM magnetic photocatalyst had five consecutive cycles with a performance above 90% from model fuel containing 500 ppm, which was separated by a magnet after each cycle and prepared for the next cycle, as well as from real diesel fuel (1.29 wt% sulfur) and Fuel oil (3.81% by weight of sulfur) was tested and the sulfur removal efficiency was 56.1% and 40.3%, respectively
  9. Keywords:
  10. Metal-Organic Framework ; Oxidative Desulfurization ; Nanophotocatalyst ; Heterostructure Composite ; Photocatalytic Desulfurization ; Magnetic Photocatalyst

 Digital Object List

 Bookmark

No TOC