UV photocatalysis-assisted adsorptive desulfurization of bi-functional Ti-Si-O materials was investigated for clean gasoline. The Ti-Si-O materials were prepared by the sol-gel method and then characterized by N2 adsorption

X-ray diffraction

etc. Desulfurization performances of the Ti-Si-O materials were examined. Sulfur species in gasoline were measured by HPLC

coulomb instrument

GC-MS and GC-SCD. The results showed that at the Ti/Si mole ratio of 3:7

the desulfurization efficiency of the Ti-Si-O material reached the maximum [96%

11.52 mg S·(g sorb)-1]

which was more superior than those of the pure TiO2 and SiO2 materials. The photocatalysis-assisted adsorptive desulfurization (PADS) rates of Ti0.3Si0.7O2 for the three organosulfur compounds followed the order of T > MT > BT. On the basis of GC-MS analysis for desulfurized products

it could be judged that the organosulfur compounds in gasoline were firstly photocatalytically oxidized to polar sulfone over Ti0.3Si0.7O2

and then selectively adsorbed on Ti0.3Si0.7O2. Ti0.3Si0.7O2 can be efficiently regenerated by acetone washing and then hot air oxidation. The regenerated Ti0.3Si0.7O2 exhibited very good activity of oxidation and adsorption after five cycles of oxidation/adsorption and regeneration

and with this PADS technology

the real gasoline can be desulfurized to < 10 mm·g-1 by using Ti0.3Si0.7O2.