Separation Science and Technology, Vol.40, No.14, 2987-2999, 2005
pi-complexation studied by fluorescence technique: Application in desulfurization of petroleum product using magnetic pi-complexation sorbents
Magnetic pi-complexation sorbents were Studied for petroleum product desulfurization by fluorescent technique. The ability of metal cation to form pi-complexation decreases in the order following: Cu+ > Ni2+ > Co2+ > Al3+. The order is consistent with that Of (desulfurization performance of their corresponding magnetic sorbents (gamma-Al2O3-Cu(l) > gamma-Al2O3-Ni(II) > gamma-Al2O3-CO(II) > gamma-Al2O3). Both pi-complexation strength and desulfurizalion performance of the sorbents increase with temperature. The adsorptive performances of magnetic gamma-Al2O3Cu(I) sorbent to different compounds have the following orders: DBT > fluorene, and pyrene > naphthalene > benzene, respectively. In this study, dibenzothiophene (DBT) was used as a model sulphur-containing compound for desulfurization. The maximal adsorption amount of magnetic gamma-Al2O3-Cu(I), was 0.362 mmol DBT g(-1).
Keywords:adsorption;magnetic alumina;pi-complexation;dibenzothiophene (DBT);fluorescence;temperature