所属 神奈川大学 理学部 化学科
|標題||Oxidative removal of dibenzothiophene and related sulfur compounds from
fuel oils under pressurized oxygen at room temperature with hydrogen
peroxide and a phosphorus-free catalyst: sodium decatungstate
|掲載誌名||Fuel Processing Technology|
|著者・共著者||Hisao Hori, Keisuke Ogi, Yuya Fujita, Yuta Yasuda, Eri Nagashima, Yusuke Matsuki, Kenji Nomiya|
|概要||We investigated the removal of dibenzothiophene (DBT) and related compounds, 4-methyldibenzothiophene (4-MeDBT), 4,6-dimethyldibenzothiophene (4,6-DMeDBT), 2,8-dimethyldibenzothiophene (2,8-DMeDBT), and 1-benzothiophene (1-BT) from several oil media at room temperature under pressurized O2 (0.6 MPa) by means of
a three-phase reaction system consisting of the oil phase, an aqueous phase containing the phosphorus-free polyoxotungstate catalyst Na4W10O32·8H2O, H2O2, and tetraoctylammonium bromide, and the gas phase. Under conditions in which the initial DBT concentration in octane was 10.1 mM, the desulfurization ratio reached 87% after reaction for 6.5 h. Prolonged reaction time to 18 h resulted in 92% desulfurization. The desulfurization of octane decreased in the order 2,8-DMeDBT~DBT > 4-MeDBT>1-BT~4,6-DMeDBT. Light oil and kerosene could also be desulfurized efficiently: after reaction for 6.5 h, the desulfurization ratios reached 77 and 78% for light oil and kerosene, respectively.