Abstract 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. The sulfur atoms in the initial DBT were well accounted for by the sulfur atoms in the residual DBT, the dibenzothiophene sulfone and dibenzothiophene 5-oxide in the octane phase, and the dibenzothiophene sulfone that precipitated. 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.

中文翻译：

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在室温加压氧气下，用过氧化氢和无磷催化剂：十钨酸钠氧化去除燃料油中的二苯并噻吩和相关硫化合物

摘要 我们研究了二苯并噻吩 (DBT) 和相关化合物、4-甲基二苯并噻吩 (4-MeDBT)、4,6-二甲基二苯并噻吩 (4,6-DMeDBT)、2,8-二甲基二苯并噻吩 (2,8-DMeDBT) 和1-苯并噻吩 (1-BT) 在室温下在加压 O2 (0.6 MPa) 下通过油相、含无磷聚氧钨酸盐催化剂 Na4W10O32·8H2O 的水相组成的三相反应体系、H2O2 和四辛基溴化铵，以及气相。在辛烷中 DBT 初始浓度为 10.1 mM 的条件下，反应 6.5 h 后脱硫率达到 87%。初始 DBT 中的硫原子被残余 DBT 中的硫原子、辛烷相中的二苯并噻吩砜和二苯并噻吩 5-氧化物很好地解释了，和沉淀的二苯并噻吩砜。将反应时间延长至 18 小时，脱硫率为 92%。辛烷的脱硫按2,8-DMeDBT~DBT>4-MeDBT>1-BT~4,6-DMeDBT的顺序降低。轻油和煤油也可以高效脱硫：反应6.5小时后，轻油和煤油的脱硫率分别达到77%和78%。