1-乙烯基-3-乙基咪唑四氟硼酸酯离子液体改性的功能硅胶的合成及脱硫性能,Industrial & Engineering Chemistry Research

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1-乙烯基-3-乙基咪唑四氟硼酸酯离子液体改性的功能硅胶的合成及脱硫性能
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : October 14, 2014 , DOI: 10.1021/ie5028793
Nan Li ₁ , Fang Wang ₁ , Zhiqing Zhang ₁ , Huihui Nie ₁ , Chengcheng Ren ₁ , Mei Cui ₁

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通过在甲苯中自由基聚合，制备了聚合的1-乙烯基-3-乙基咪唑四氟硼酸根离子液体改性的硅胶微球。使用傅立叶变换红外（FTIR），元素分析，扫描电子显微镜（SEM），能量分散光谱（EDS），凝胶渗透色谱（GPC），热重分析（TGA）和¹³ C，^29进行表征Si魔角旋转（MAS）核磁共振（NMR）表明1-乙烯基-3-乙基咪唑四氟硼酸酯已成功地负载在硅胶表面上并形成稳定的聚合物涂层。此外，为了检测潜在的脱硫性能，已经进行了一系列使用聚合物离子液体改性硅胶对燃料进行脱硫的模型实验。改性的二氧化硅凝胶的脱硫效率通过从模型中除去燃料2甲基噻吩，苯并噻吩，二苯并噻吩和（调查Ñ-庚烷/ 2-甲基噻吩，苯并噻吩和二苯并噻吩）在测试条件下。结果表明，改性硅胶对芳族含S化合物具有明显的脱硫能力，并且由于不同的芳族π电子密度，其脱硫选择性遵循2-甲基噻吩<苯并噻吩<二苯并噻吩的顺序。

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Synthesis and Desulfurization Performance of Functional Silica Gel Modified by Polymeric 1-Vinyl-3-ethylimidazolium Tetrafluoroborate Ionic Liquids

Polymeric 1-vinyl-3-ethylimidazolium tetrafluoroborate ionic liquids modified microspheres of silica gel were prepared by free radical polymerization in toluene. Characterization with Fourier transform infrared (FTIR), elemental analysis, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), gel permeation chromatography (GPC), thermogravimetric analysis (TGA), and ¹³C, ²⁹Si magic angle spinning (MAS) nuclear magnetic resonance (NMR) demonstrated that 1-vinyl-3-ethylimidazolium tetrafluoroborate had successfully loaded on the surface of silica gel and formed a stable polymer coating. Furthermore, to detect the potential desulfurization performance, a series of experiments of model fuel desulfurization with polymeric ionic liquid modified silica gel had been carried out. The desulfurization efficiency of modified silica gel was investigated by removing 2-methylthiophene, benzothiophene, and dibenzothiophene from model fuel (n-heptane/2-methylthiophene, benzothiophene, and dibenzothiophene) under tested conditions. It was shown that the modified silica gel exhibited remarkable desulfurization capacity for aromatic S-containing compounds and the sulfur removal selectivity followed the order of 2-methylthiophene < benzothiophene < dibenzothiophene due to the different density aromatic π-electrons.

更新日期：2017-01-31

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