Abstract
The desulfurization performance of solid superacid type adsorbent (sulfated alumina) for commercial kerosene was evaluated on batch system and on continuous flow system. Adsorptive desulfurization using acidic adsorbent, especially sulfated alumina, is promising method for desulfurization of commercial kerosene at moderate condition. The acid property seemed to effect on adsorption performance. Adsorbents combination of 4.1 l, 0.3 l of activated carbon supporting copper oxide and silver oxide and 3.8 l of Lewis acid type sulfate alumina in series, was evaluated for long term adsorptive desulfurization of commercial kerosene without using hydrogen at ambient temperature at a flow rate of 105 cm3/h, which corresponds the flow rate of about 350 W scale of PEFC. Thiophene type and benzothiophene type sulfur compounds had not leaked for more than 2300 h. Dibenzothiophene (DBT) type sulfur compounds had not also leaked until 810 h, and it reached 0.02 mass ppm at 2000 h, and then 0.03 mass ppm at 2300 h. Especially C3-alkyl-DBT was difficult to be removed.
