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Synthesis and Application of Metal Doped Silica Particles for Adsorptive Desulphurization of Fuels
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  • Journal title : Environmental Engineering Research
  • Volume 19, Issue 3,  2014, pp.205-214
  • Publisher : Korean Society of Environmental Engineering
  • DOI : 10.4491/eer.2014.017
 Title & Authors
Synthesis and Application of Metal Doped Silica Particles for Adsorptive Desulphurization of Fuels
Jabeen, Bushra; Rafique, Uzaira;
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Petroleum a vital commodity affecting every aspect of 21st century. Toxicity and adverse effects of sulphur as catalyst in petroleum products is of great concern required development of techniques for desulphurization in compliance with the International standards. Installation of desulphurizing units costs over $200 million per unit placing economic burden on developing countries like Pakistan. Present study analysis of commercial fuels (station petrol and jet fuel JP8) on gas chromatography-mass spectrometry (GC-MS) identified sulphur concentration of 19.94 mg/L and 21.75 mg/L, respectively. This scenario urged the researcher to attempt synthesis of material that is likely to offer good adsorption capacity for sulphur. Following protocol of sol-gel method, transition metals (Ni, Cu, Zn) solution is gelated with tetraethoxysilane (TEOS; silica precursor) using glycerol. Fourier transform infrared spectroscopy (FTIR) spectra revealed bonding of Zn-O, Cu-O, and Ni-O by stretching vibrations at , , and , respectively. Thiophene and Benzothiophene mixed in n-heptane and benzene (4:1) for preparation of Model Fuels I and II, respectively. Each of silica based metal was applied as adsorbent in batch mode to assess the removal efficiency. Results demonstrated optimal desulphurization of more than 90% following efficacy order as Si-Ni > Si-Zn > Si-Cu based adsorbents. Proposed multilayered (Freundlich) adsorption mechanism follows -complexation with pseudo secnd order kinetics.
Adsorption;Desulphurization;Fuel;Silica particles;Transition metals;
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