Desulfurization Performance of Ether-Functionalized Imidazolium-Based Ionic Liquids Supported on Porous Silica Gel
Desulfurization Performance of Ether-Functionalized Imidazolium-Based Ionic Liquids Supported on Porous Silica Gel
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DOI：
10.1021/ef502682v
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发表时间：
2015-02
期刊：
影响因子：
5.3
通讯作者：
Ying Zhao;Jian-ying Wang;Haichao Jiang;Yong-qi Hu
中科院分区：
文献类型：
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作者：
Ying Zhao;Jian-ying Wang;Haichao Jiang;Yong-qi Hu
采用易浸渍法将醚功能化咪唑基离子液体（EFIILs） [C3O1Mim][H3CSO3]、[C5O2Mim][H3CSO3]和[C7O3Mim][H3CSO3]负载在多孔硅胶颗粒上。采用傅里叶变换红外光谱（FTIR）、扫描电镜（SEM）、热重分析（TGA）和布鲁诺尔-埃米特-泰勒（BET）对合成的EFIILs/SiO2进行了表征。结果表明，EFIILs/SiO2具有良好的热稳定性、高孔隙率和大比表面积。实验研究了EFIILs和EFIILs/SiO2对气态二氧化硫（SO2）的可逆吸附能力，证实了EFIILs和EFIILs/SiO2对SO2的高吸附容量和高吸附速率。[C3O1Mim][H3CSO3]的SO2容量分别为2.621 mol /mol， 3.106 mol /mol [C5O2Mim][H3CSO3]和3.453 mol /mol [C7O3Mim][H3CSO3]，表明在25℃时，阳离子中醚链长度越长，SO2吸附量越大。EFIILs/SiO2有更好的…
Ether-functionalized imidazolium-based ionic liquids (EFIILs) [C3O1Mim][H3CSO3], [C5O2Mim][H3CSO3], and [C7O3Mim][H3CSO3] were supported onto porous silica gel particles via a facile impregnation method. The synthesized EFIILs/SiO2 were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and Brunauer–Emmett–Teller (BET). Results show that the EFIILs/SiO2 have good thermal stability, high porosity, and large specific surface area. The ability of both of the EFIILs and EFIILs/SiO2 to reversibly absorb gaseous sulfur dioxide (SO2) was experimentally investigated, and high capacity and rate for SO2 sorption were confirmed. The capacities reached 2.621 mol of SO2/mol of [C3O1Mim][H3CSO3], 3.106 mol of SO2/mol of [C5O2Mim][H3CSO3], and 3.453 mol of SO2/mol of [C7O3Mim][H3CSO3], which indicate that the SO2 sorption capacity increases with the increase of the ether chain length in the cation at 25 °C. The EFIILs/SiO2 have better ad...