Special Articles on Global and Regional Environment and Chemistry. Hydrodesulfurization of Dibenzothiophene and 2, 8-Diethyldibenzothiophene over Sulfided CoMo/Al2O3 Catalyst.

The hydrodesulfurization of dibenzothiophene and 2, 8-die thyldibenzothiphene over the sulfied CoMo/Al2O3 catalyst was studied using a batch method. The experiment was carried out at 250∼350°C and 5.0 MPa of H2 initial pressure for 4 h. The hydrogenation of biphenyl did not take place until dibenzothiophene was converted completely. The hydrodesulfurization of 2, 8-diethyldibenzothiophene proceeded more readily than that of dibenzothiophene. The percent desulfurization and the amount of H2 consumption of 2, 8-diethyldibenzothiophene was 1.9 and O.27 times those of dibenzothiophene, respectively (Table 1). The results showed that 2, 8-diethyldibenzothiophene was desulfurized more easily than dibenzothi ophene with relatively samll amount of H2 consumption during hydrodesuljurization.