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首页> 外文期刊>RSC Advances >Polyetherimide hollow fiber membranes for CO2 absorption and stripping in membrane contactor application
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Polyetherimide hollow fiber membranes for CO2 absorption and stripping in membrane contactor application

机译：聚醚酰亚胺中空纤维膜在膜接触器中用于CO 2 的吸收和汽提

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Porous asymmetric polyetherimide (PEI) hollow fiber membranes with various non-solvent additives, e.g. lithium chloride, methanol and phosphoric acid (PA) were prepared for CO2 absorption and stripping process in a membrane contractor. The PEI membranes were characterized via gas permeation, liquid entry pressure of water (LEPw), contact angle and field emission scanning electronic microscopy analysis. The CO2 absorption and stripping performance was evaluated via the membrane contactor system. Addition of non-solvent additives increased the LEPw and membrane porosity of the PEI membrane with the formation of various membrane microstructures and contact angles. Absorption test was performed at 40 °C showed that the PEI–PA membrane produced the highest absorption flux of 2.7 × 10?2 mol m?2 s?1 at 0.85 m s?1 of liquid velocity. Further testing on PEI–PA membrane was conducted on CO2 stripping at 60 °C, 70 °C to 80 °C and the results indicated that the stripping flux was lower compared to the absorption flux. Stripping tests at 80 °C produced the highest stripping flux which might due to the increase in equilibrium partial pressure of CO2 in the liquid absorbent. Modification of PEI membrane via incorporation of additive can enhanced the performance of a membrane contactor via increasing the absorption and stripping flux.
机译：制备了带有例如氯化锂，甲醇和磷酸（PA）的多种非溶剂添加剂的多孔不对称聚醚酰亚胺（PEI）中空纤维膜，用于CO 2 < / small>膜收缩器中的吸收和剥离过程。通过气体渗透，水的液体进入压力（LEPw），接触角和场发射扫描电子显微镜分析对PEI膜进行表征。通过膜接触器系统对CO 2 的吸收和汽提性能进行了评估。添加非溶剂添加剂会增加PEI膜的LEPw和膜孔隙率，并形成各种膜微结构和接触角。在40°C下进行的吸收测试显示，PEI–PA膜产生的最大吸收通量为2.7×10 ？2 mol m ？2 s ？1 的液体速度为0.85 ms ？1 。在60°C，70°C至80°C的CO 2 汽提中对PEI–PA膜进行了进一步测试，结果表明汽提通量比吸收通量。 80°C的汽提试验产生最高的汽提通量，这可能是由于液体吸收剂中CO 2 的平衡分压增加所致。通过添加添加剂修饰PEI膜，可以通过增加吸收和剥离通量来增强膜接触器的性能。

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