The presence of SO₂ in coal-fired flue gas has adverse effects on the amine solutions used for CO₂ capture. In addition, SO₂ emissions in the atmosphere are also a primary source of pollution. In this study, the SO₂ removal efficiency of three aqueous alkaline absorbents NaOH, Na₂SO₃, and CaO was studied using a membrane contactor. The morphology of the used membrane was examined using SEM and contact angle characterization techniques. Gas removal efficiency was studied within a feed gas flow rate of 0.5–5 m³/h, absorbent flow rate of 5–100 mL/min, and absorbent concentration of 0–0.01 mol/L. The gathered results showed that aqueous CaO has superior gas removal performance. It achieved a SO₂ removal efficiency of 99.99 % at a concentration of 0.0025 mol/L, while the aqueous NaOH and Na₂SO₃ absorbents achieved 99.99 % removal efficiency at concentrations of 0.001 mol/L. Through comprehensive experimental work, the optimum operating parameters needed to achieve maximum SO₂ removal efficiency were also determined. Furthermore, the durability of the membrane was tested in a four week continuous gas removal test and SEM images were recorded weekly to observe module morphology. The obtained results indicated that the membrane was quite durable and did not deteriorate noticeably.

燃煤烟气中SO ₂的存在对用于CO ₂捕集的胺溶液有不利影响。此外，大气中的SO ₂排放也是主要的污染源。在这项研究中，使用膜接触器研究了三种水性碱性吸收剂NaOH，Na ₂ SO ₃和CaO的SO ₂去除效率。使用SEM和接触角表征技术检查所用膜的形态。在进料气流量为0.5–5 m ^3的情况下研究了除气效率/ h，吸收剂流速为5–100 mL / min，吸收剂浓度为0–0.01 mol / L。收集的结果表明，CaO水溶液具有优异的除气性能。在浓度为0.0025 mol / L时，SO _2的去除效率为99.99％，而在浓度为0.001 mol / L时，NaOH和Na ₂ SO ₃吸收剂水溶液的去除率为99.99％。通过全面的实验工作，获得最大SO ₂所需的最佳操作参数还确定了去除效率。此外，在连续四周的除气测试中测试了膜的耐久性，并每周记录了SEM图像以观察组件的形态。所得结果表明该膜非常耐用并且没有明显的劣化。