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采用水热法合成了具有很好催化性能的Bi_2MoO_6催化剂,并利用XRD、FT-IR、SEM和EDS等分析技术对其结构和形貌进行表征。以Bi_2MoO_6为催化剂,1-丁基-3-甲基咪唑盐酸盐([BMIM]Cl)离子液体为萃取剂,H_2O_2为氧化剂氧化脱除模拟油中的二苯并噻吩(BDT)。考察了反应温度,氧化剂、离子液体和催化剂使用量,不同种类的含硫化合物以及催化剂稳定性等因素对脱硫效果的影响。在V(oil)=5 m L,V(H_2O_2)=0.2 m L,V([BMIM]Cl)=1.0 m L,m(Bi_2MoO_6)=0.02 g,T=60℃的最佳操作条件下,模拟油中的DBT的脱除率可达到94.58%。催化剂重复使用5次活性无明显下降。同时,详细地研究了该催化氧化反应的反应机理。
Bi_2MoO_6 catalysts with good catalytic performance were synthesized by hydrothermal method. Their structures and morphology were characterized by XRD, FT-IR, SEM and EDS. Bi 2 MoO 6 as catalyst, 1-butyl-3-methylimidazolium chloride ([BMIM] Cl) ionic liquid as extractant and H 2 O 2 as oxidant for oxidative removal of dibenzothiophene (BDT) in simulated oil. The influences of reaction temperature, the amount of oxidant, ionic liquid and catalyst, different kinds of sulfur compounds and the stability of catalyst on the desulfurization effect were investigated. Under the optimal operating conditions of V (oil) = 5 m L, V (H 2 O 2) = 0.2 m L, V ([BMIM] Cl) = 1.0 m L, m (Bi 2 MoO 6) = 0.02 g and T = 60 ℃, The removal rate of DBT in simulated oil can reach 94.58%. No significant decrease in the activity of the catalyst after 5 repeated use. Meanwhile, the reaction mechanism of the catalytic oxidation reaction was studied in detail.