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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 40156 (06)
- University: Sharif University of Technology
- Department: Chemical and Petroleum Engineering
- Advisor(s): Vossoughi, Manoochehr; Aalemzadeh, Iran
- Abstract:
- In this research, carbon nanotubes (CNTs) and CNT coated by titanium dioxide (TiO2) were used as adsorbents for desulfurization. Photocatalytic oxidation by titanium dioxide Degussa P-25 nanoparticles (as photocatalyst) immobilized on a porous and low-density support called “perlite” and CNT/TiO2 was perused. TiO2-coatings were prepared by liquid phase deposition method.This is a wet process for the formation of metal oxide thin films on substrates. The coating of nanotubes with TiO2 was confirmed by IR and EDAX and morphological properties were observed by SEM analysis.The physical properties of adsorbents were determine using BET.Dibenzothiophene (DBT)dissolved in acetonitrile was used as oil model in Desulfurization experiments and the samples concentrations were determined using HPLC.In adsorption, effect of initial concentration and the amount of adsorbent were perused. The result showed that CNT/TiO2 has greater adsorption capacity than CNT. Langmuir and Freundlich models were applied to determine adsorption isotherm and the result revealed that the adsorption isotherm has better corrolation with Freundlich model. Kinetic of photocatalytic reactions are first order, which the constants were determined. Immobilization of P-25 on perlit increased the efficiency and rate of DBT conversion, considerably.
- Keywords:
- Carbon Nanotubes ; Titanium Dioxide ; Dibenzothiophene (DBT) ; Adsorption ; Desulfurizing ; Photocatalytic Oxidation
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محتواي پايان نامه
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