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Deep oxidative desulfurization of model fuels catalysed by immobilized ionic liquid on MIL-100(Fe)

机译:固定化离子液体在MIL-100(Fe)上催化的模型燃料进行深度氧化脱硫

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Deep desulfurization of fossil fuels has become urgently required because of the serious pollution by the large-scale use of fossil fuels. In this study, [PrSO _(3) HMIm]HSO _(4) @MIL-100(Fe) was synthesized by wet-impregnation of the ionic liquid (IL) of [PrSO _(3) HMIm]HSO _(4) on MIL-100(Fe). The construction of [PrSO _(3) HMIm]HSO _(4) @MIL-100(Fe) was then confirmed by X-ray powder diffraction, N _(2) adsorption–desorption experiments, infrared spectroscopy and elemental analysis, and then applied in the oxidative desulfurization of model fuels. In comparison with the corresponding IL, [PrSO _(3) HMIm]HSO _(4) @MIL-100(Fe) showed an enhanced performance in the desulfurization rate of model fuels due to the increase of the mass transfer rate. Under the optimized conditions (oxidant to sulphur ratio = 25, oil to acetonitrile ratio = 1, and temperature = 60 °C), a sulphur removal rate of 99.3% was observed (initial sulphur concentration = 50 ppm). The sulphur removal of three sulphur compounds by catalytic oxidation and extraction followed the order of dibenzothiophene (DBT) > thiophene (T) > benzothiophene (BT).
机译:由于大规模使用化石燃料会造成严重污染,因此迫切需要对化石燃料进行深度脱硫。在这项研究中,[PrSO _(3)HMIm] HSO _(4)@ MIL-100(Fe)是通过湿浸渍[PrSO _(3)HMIm] HSO _(4)的离子液体(IL)合成的)在MIL-100(Fe)上。然后通过X射线粉末衍射,N _(2)吸附-解吸实验,红外光谱和元素分析确定了[PrSO _(3)HMIm] HSO _(4)@ MIL-100(Fe)的结构。然后应用于模型燃料的氧化脱硫。与相应的IL相比,[PrSO _(3)HMIm] HSO _(4)@ MIL-100(Fe)由于传质速率的增加而显示出模型燃料脱硫率的增强性能。在最佳条件下(氧化剂与硫之比= 25,油与乙腈之比= 1,温度= 60°C),除硫率为99.3%(初始硫浓度为50 ppm)。通过催化氧化和萃取除去三种硫化合物的硫依次为二苯并噻吩(DBT)>噻吩(T)>苯并噻吩(BT)。

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