Desulfurization by ionic liquids (ILs) has attracted wide attention since ILs as green solvents can be recycled after desorption. However, the high viscosities of ILs limit the sulfur dioxide (SO₂) absorption in gas-liquid contactors. In this work, a rotating packed bed (RPB) with excellent mass transfer performance was employed for SO₂ removal with caprolactam tetrabutyl ammonium bromide ([CPL][TBAB]) IL. Effects of rotational speed, temperature, liquid flow rate, and gas flow rate on the desulfurization efficiency were systematically studied. By optimization of the solvents, the desulfurization efficiency remains almost unchanged after multiple absorption and regeneration cycles, and the energy consumption during desorption process can also be reduced. These results indicated that the RPB combined with ILs has promising prospects for SO₂ absorption and desorption in sulfuric acid plants.

由于离子液体作为绿色溶剂可以在脱附后进行循环利用，因此离子液体（IL）的脱硫倍受关注。但是，IL的高粘度限制了气液接触器中二氧化硫（SO ₂）的吸收。在这项工作中，SO ₂采用了具有出色传质性能的旋转填充床（RPB）用己内酰胺四丁基溴化铵（[CPL] [TBAB]）IL去除。系统地研究了转速，温度，液体流量和气体流量对脱硫效率的影响。通过优化溶剂，在多次吸收和再生循环后，脱硫效率几乎保持不变，并且还可以减少脱附过程中的能耗。这些结果表明，RPB结合ILs在硫酸工厂中对SO _2的吸收和解吸具有广阔的前景。