Pebax®1657 and [Omim][PF6] ionic liquid (IL) were used to fabricate a blend membrane and applied for CO2 separation. The changes upon adding ionic liquid into the polymer matrix as well as the membrane characteristics were studied through SEM, FTIR, DSC and TGA analysis. The obtained gas permeation results indicated that the CO2 permeability in all membranes was much higher than the other studied gases. CO2 permeability of Pebax containing 8 wt% IL increased from 82.3 Barrer up to 125.6 Barrer at a pressure of 2 bar, which showed a 53% increment compared to the neat Pebax membrane. Furthermore, as the [Omim][PF6] loading within the polymer matrix was increased, the CO2/CH4 and CO2/N2 selectivities improved. In addition, the permeability and selectivity of gases was enhanced as the feed pressure increased. Upon increasing feed pressure to 10 bar, the CO2 permeability of Pebax containing 8 wt% IL reached 185.3 Barrer, which was approximately 48% higher than the permeability at a pressure of 2 bar. Moreover, the selectivity of CO2/CH4 and CO2/N2 for the Pebax/8wt% IL membrane at pressure of 2 bar was 15.3 and 46.5, respectively, which improved to 19.7 and 59.8 as the pressure increased to 10 bar.

中文翻译：

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使用由 Pebax®1657 和 [Omim][PF6] 离子液体组成的二元相膜优先分离 CO2

Pebax®1657 和 [Omim][PF6] 离子液体 (IL) 用于制造混合膜并应用于 CO2 分离。通过SEM、FTIR、DSC和TGA分析研究了在聚合物基质中加入离子液体后的变化以及膜特性。获得的气体渗透结果表明，所有膜中的 CO2 渗透率远高于其他研究气体。在 2 bar 的压力下，含有 8 wt% IL 的 Pebax 的 CO2 渗透率从 82.3 Barrer 增加到 125.6 Barrer，与纯 Pebax 膜相比增加了 53%。此外，随着聚合物基质中的 [Omim][PF6] 负载量的增加，CO2/CH4 和 CO2/N2 的选择性得到提高。此外，气体的渗透性和选择性随着进料压力的增加而增强。当进料压力增加到 10 bar 时，含有 8 wt% IL 的 Pebax 的 CO2 渗透率达到 185.3 Barrer，比 2 bar 压力下的渗透率高约 48%。此外，在 2 bar 压力下，Pebax/8wt% IL 膜的 CO2/CH4 和 CO2/N2 选择性分别为 15.3 和 46.5，随着压力增加到 10 bar，分别提高到 19.7 和 59.8。