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Adsorption and desorption of dibenzothiophene on Ag-titania studied by the complementary temperature-programmed XPS and ESR |
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| Authors: | Alexander Samokhvalov Evert C DuinSachin Nair Bruce J Tatarchuk |
| Institution: | a Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA b Department of Chemistry and Biochemistry, Auburn University, Auburn, AL 36849, USA c Department of Chemistry, Rutgers University, Camden, NJ 08102, USA |
| Abstract: | Adsorption, desorption and structure of the surface chemical compounds formed upon interaction of dibenzothiophene (DBT) in solution of n-octane with the sulfur-selective Ag/Titania sorbent for the ultradeep desulfurization of liquid fuels was characterized by the temperature-programmed X-ray photoemission spectroscopy (XPS) and Electron Spin Resonance. Adsorption of DBT proceeds via chemisorption via the oxygen-containing surface groups. Desorption of DBT and thermal regeneration of the “spent” Ag/Titania were studied by the complementary temperature-programmed XPS and ESR from 25 °C to 525 °C, in the high vacuum vs. air. The XPS spectrum of the pure DBT is reported for the first time. |
| Keywords: | Dibenzothiophene Fuel desulfurization sorbent In-situ temperature-programmed XPS ESR Ag/Titania |
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