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实验采用微波辅助合成了1-乙基-3-甲基咪唑四氟硼酸([Emim]BF4)离子液体,采用多种方法表征了该离子液体的结构。构建了离子液体[Emim]BF4、水和乙醇的脱硫体系,并对脱硫工艺进行了探讨,考察了反应温度、SO2气体体积分数、气体流量以及脱硫体系配比对脱硫的影响,确定适宜的脱硫反应条件为反应温度30℃,入口SO2气体体积分数2×10-3,SO2气体进气流量控制为150mL/min,脱硫体系V(离子液体[Emim]BF4)∶V(水)∶V(乙醇)=1∶1.5∶3时,脱硫效率最高。并且[Emim]BF4具有良好的再生性能,脱硫液可实现重复利用。
The microwave-assisted synthesis of 1-ethyl-3-methylimidazolium tetrafluoroborate ([Emim] BF4) ionic liquid has been used to characterize the structure of the ionic liquid by a variety of methods. The desulfurization system of ionic liquid [Emim] BF4, water and ethanol was constructed and the desulfurization process was discussed. The effects of reaction temperature, SO2 gas volume fraction, gas flow rate and the ratio of desulfurization system on desulfurization were investigated. The reaction conditions were: reaction temperature 30 ℃, inlet SO2 gas volume fraction 2 × 10-3, SO2 gas inlet flow rate control 150mL / min, desulfurization system V (ionic liquid [Emim] BF4): V ) = 1: 1.5: 3, the desulfurization efficiency is the highest. And [Emim] BF4 has a good regeneration performance, desulfurization solution can be reused.