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首页> 外文期刊>RSC Advances >Oxidative desulfurization of model oil in an organic biphasic system catalysed by Fe3O4@SiO2–ionic liquid
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Oxidative desulfurization of model oil in an organic biphasic system catalysed by Fe3O4@SiO2–ionic liquid

机译：Fe 3 O 4 @SiO 2 –离子液体催化的有机双相体系中模型油的氧化脱硫

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摘要

Lewis or Br?nsted acidic methylimidazolium ionic liquid-functionalized Fe3O4@SiO2 nanoparticles were fabricated and applied as an efficient magnetic heterogeneous catalyst for dibenzothiophene (DBT) oxidation in a biphasic system using H2O2 as the oxidant. The structures of catalysts were characterized by SEM, TEM, XRD, TGA, FT-IR, VSM and EDX techniques. The magnetic catalysts showed high catalytic performance in the oxidation of DBT in an n-hexane/acetonitrile biphasic system using H2O2, and high conversions were obtained. The effects of contact time, temperature, amount of H2O2 and amount of catalyst on the DBT oxidative removal efficiency were investigated. The contact time of 60 min, 0.1 g catalyst, and 4 mL H2O2 at 313 K were found as optimal experimental conditions for an improved DBT oxidative removal process. The sulfur level could be lowered from 100 ppm to less than 7, 5, and 2 ppm under optimal conditions for Fe3O4@SiO2–Mim-BF4, Fe3O4@SiO2–Mim-HSO4, and Fe3O4@SiO2–Mim–FeCl4, respectively. These nanomagnetic heterogeneous catalysts could be easily separated from the reaction mixture by applying an external magnetic field and recycled several times.
机译：Lewis或Br？nsted酸性甲基咪唑鎓离子液体官能化的Fe 3 O 4 @SiO 2 纳米颗粒，并将其用作H 2 O <的双相体系中双苯并噻吩（DBT）氧化的高效磁性多相催化剂。 small> 2 作为氧化剂。通过SEM，TEM，XRD，TGA，FT-IR，VSM和EDX技术对催化剂的结构进行了表征。磁性催化剂在H 2 O n> n -己烷/乙腈双相系统中对DBT的氧化具有很高的催化性能。 sub> 2 ，并获得了很高的转化率。接触时间，温度，H 2 O 2 的量和催化剂用量对DBT氧化的影响研究了去除效率。 60分钟，0.1 g催化剂和4 mL H 2 O 2 的接触时间为313 K被发现作为改进DBT氧化去除工艺的最佳实验条件。在Fe 3 O 4 @SiO 2 –Mim-BF 4 ，Fe 3 O 4 @SiO 2 –Mim-HSO 4 和Fe 3 O 4 @SiO < sub> 2 –Mim–FeCl 4 。通过施加外部磁场可以容易地将这些纳米磁性非均相催化剂从反应混合物中分离出来，并循环几次。

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