Abstract
International regulations have established the decrease on sulfur content in fuels down to as low as 10 ppm in a few years from now. Cyclic sulfur compounds are noticeably refractory to hydrodesulfurization (HDS) processes, which are the usual technology found in oil refineries. To meet the increasingly strict environmental requirements, selective physisorption may be a feasible option toward lowering the sulfur content of the outlet streams of current HDS units. The present work investigates the adsorption of benzothiophene (BT) and dibenzothiophene (DBT) in hydrophobic microporous activated carbons impregnated with PdCl2. The adsorbents used were commercial samples (Norit, Amersfoort, The Netherlands) modified by wet impregnation of PdCl2 in acidic media, followed by drying at 130 °C under He flow. They were characterized by N2 adsorption isotherms, transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectronic spectroscopy (XPS). Characterization results provide evidence tha...
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