以硅钨杂多酸盐为催化剂对模拟柴油氧化脱硫的研究  

Investigation on Oxidative Desulfurization of Model Diesel Using Tungstosilicate Heteropolyacids as Catalyst

作　　者：刘鹏飞[1] 吕宏缨[1] 齐世学[1] 

机构地区：[1]烟台大学化学化工学院,山东烟台264005

出　　处：《烟台大学学报（自然科学与工程版）》2013年第2期101-105,共5页Journal of Yantai University(Natural Science and Engineering Edition)

基　　金：山东省优秀中青年科学家科研奖励基金资助项目(BS2010NJ017);山东省高等学校科技计划项目(J11LB16)

摘　　要：合成了带两缺陷的Keggin型硅钨杂多酸盐Q6[K2γ-SiW10O36],并以此作为催化剂,以双氧水为氧化剂,对模拟柴油进行氧化脱硫的研究.实验结果表明:(C21H46N)6[K2γ-SiW10O36]表现出了较好的催化活性;在50℃,氧硫比O/S=5条件下,1h内脱硫率可达100%;不同含硫化合物被氧化的难易顺序为二苯并噻吩(DBT)>4-甲基二苯并噻吩(4MDBT)>4,6-二甲基二苯并噻吩(4,6-DMDBT)>苯并噻吩(BT),含硫化合物的氧化活性与其中硫原子电子密度和取代基的空间位阻有关.Two-lacunary polyanion salt Q6 [ K2γ-SiW10O36 ] with Keggin-type structure is synthesized. The investigation on okidative desulfurization of model diesel is preformed using the polyanion as catalyst and hydrogen peroxide as oxidant. The result indicates that the catalytic activity of Q6 [ K2γ-SiW10O36 ] is so high that the 100% conversion of DBT reaches at 50℃ for 1 h of when the molar ratio O/S is 5. The reactivity of the sulfur-containing compounds follows the order of DBT 〉 4MDBT 〉 4,6-DMDBT 〉 BT. The desulfurization reactivities of the above sulfur-containing compounds are sensitive to the election density of sulfur atoms and the steric hindrance of the substituted groups.

关 键 词：氧化脱硫 硅钨杂多酸盐 模拟柴油 双氧水 

分 类 号：O643.36[理学—物理化学]