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合成了一系列有机-无机杂多酸类离子液体,并将其应用于超声作用下的催化模拟汽油氧化脱硫反应.结果表明,在超声波辅助下,不仅反应时间大大缩短,而且脱硫效率也大幅提高.在合成的一系列催化剂中,Zr_(0.25)[BMIM]HPW_(12)O_40表现出最佳的催化活性.考察了超声波功率、超声/间隙时间、催化剂用量、H_2O_2用量、反应温度及反应时间等因素对脱硫效果的影响.以Zr_(0.25)[BMIM]HPW_(12)O_40为催化剂,在优化的条件下[n(Cat.)=0.008 mmol,V(H_2O_2)=40μL,V(模拟油)=10 m L,V(乙腈)=1 m L,温度25℃,时间10 min,超声功率300 W,超声时间2 s,间隙时间1.5 s],二苯并噻吩(DBT)的脱硫率达到97.8%;该催化剂循环使用5次后,脱硫率仍为81.9%;其对不同硫化物的催化活性顺序为DBT>4,6-二甲基苯并噻吩(4,6-DMDBT)>乙硫醚>苯硫醚>正丁硫醇>甲基苯基硫醚>苯并噻吩(BT)>噻吩.
A series of organic-inorganic heteropolyacid ionic liquids were synthesized and applied to the catalytic simulation of oxidative desulfurization of gasoline under the action of ultrasound.The results showed that not only the reaction time was greatly shortened, but also the desulfurization efficiency was greatly improved The best catalytic activity of Zr_ (0.25) [BMIM] HPW_ (12) O_40 was found in a series of catalysts synthesized.Effects of ultrasonic power, ultrasonic / interstitial time, amount of catalyst, amount of H_2O_2, reaction temperature and reaction time (Cat.) = 0.008 mmol, V (H 2 O 2) = 40 μL, V (simulated oil) under the optimum conditions with Zr 0.25 (BMIM) HPW 12 O 40 as catalyst, ) = 10 m L, V (acetonitrile) = 1 m L, temperature 25 ℃, time 10 min, ultrasonic power 300 W, ultrasonic time 2 s and gap time 1.5 s]. The desulfurization rate of dibenzothiophene (DBT) 97.8%. After 5 cycles, the desulfurization rate of the catalyst was still 81.9%. The catalytic activity of the catalyst for different sulfides was DBT> 4,6-DMDBT> Ether> Phenylthioether> n-Butanethiol> Methylphenyl Sulfide> Benzothiophene (BT)> Thiophene.