Ionic liquid mixed matrix membranes (IL3Ms) were synthesized using polyethersulfone (PES) as the base polymer and silica-aluminophosphate (SAPO-34) as the dispersed particles, and their CO₂ permeation was investigated. Three of the most widely used models for gas separation—the Maxwell, Lewis–Nielson, and Maxwell–Wagner–Sillar (MWS) models—were then applied to the membranes. Large deviations were found between the model predictions and experimental data. FESEM images suggested that local agglomeration and disorientation of the SAPO-34 particles within the membrane afforded substantial changes in the morphology. The MWS model, which considers the shape factor, was modified to incorporate the volume fraction of the wetted dispersed phase and the ideal shape factor. A direct relationship was found between the filler concentration and the shape factor. The modified model was shown to produce absolute and relative errors of less than 3%. When validated against data from the literature, the deviation remained within 5%. The modified model can be used to estimate the gas permeance of an IL3M.

中文翻译：

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通过增强的离子液体混合基质膜（IL3M）预测CO2渗透

以聚醚砜（PES）为基础聚合物，硅铝磷酸盐（SAPO-34）为分散颗粒，及其CO ₂合成离子液体混合基质膜（IL3Ms）。研究渗透性。然后将三种最广泛使用的气体分离模型—麦克斯韦，刘易斯—尼尔森和麦克斯韦—瓦格纳—西拉（MWS）模型应用于膜。在模型预测和实验数据之间发现较大的偏差。FESEM图像表明，SAPO-34颗粒在膜内的局部团聚和取向失调提供了形态上的实质性变化。修改了考虑形状因子的MWS模型，以合并润湿分散相的体积分数和理想形状因子。发现填料浓度和形状因子之间存在直接关系。修改后的模型显示出绝对和相对误差小于3％。根据文献数据进行验证后，偏差保持在5％以内。