Carbon molecular sieve membranes (CMSMs) with a remarkable separation performance and stability were prepared from an ionic liquid regenerated cellulose precursor. Extremely high selectivities to H₂ and CO₂ are reported (H₂/CH₄ > 206 000 and CO₂/CH₄ > 14 600) due to the precise pore size of the produced membranes. Selectivity results >3590 are reported for the first time for the C₃H₆/C₃H₈ separation using cellulose-based CMSMs. However, after one year exposed to ambient air the permeability of these CMSMs to O₂ reduced approximately 62% and the O₂/N₂ selectivity increased 72% due to the chemisorption of oxygen. In this work it is demonstrated that exposure to propylene can not only regenerate the aged CMSMs but, more importantly, it can passivate them in a long-lasting way. CMSMs exposed to propylene for 10 days acquired aging-resistant properties that last for more than 1 year, i.e. they preserve their separation performances after 1 year exposed to ambient air. The regeneration of these CMSMs using propylene causes an increase in the permeability to O₂ and in the O₂/N₂ selectivity of aged CMSMs. The effect of oxygen chemisorption and the passivation and regeneration by propylene post-treatment were evaluated by adsorption isotherms, FTIR, XPS and Raman spectra. Transport properties were evaluated for O₂ and N₂. The propylene post-treatment reduced the fraction of oxygenated groups on the surface of the CMSM, causing the widening of the pores, changing the adsorption kinetics of the gases. The results presented in this work demonstrate the industrial attractiveness of this type of membranes for the separation of gases with high performance and stability.

以离子液体再生纤维素前体为原料制备了具有卓越分离性能和稳定性的碳分子筛膜（CMSMs）。 由于所生产膜的孔径精确，据报道对 H ₂和 CO ₂具有极高的选择性（H ₂ /CH ₄  > 206 000 和 CO ₂ /CH ₄ > 14 600）。对于使用基于纤维素的 CMSM进行的 C ₃ H ₆ /C ₃ H ₈分离，首次报告的选择性结果 >3590 。然而，在暴露于环境空气一年后，这些 CMSM 对 O ₂的渗透性降低了大约 62%，O由于氧的化学吸附，₂ /N _{2 的}选择性增加了72%。在这项工作中，表明暴露于丙烯不仅可以使老化的 CMSM 再生，而且更重要的是，它可以以持久的方式钝化它们。暴露于丙烯 10 天的 CMSM 获得了持续超过 1 年的抗老化性能，即它们在暴露于环境空气 1 年后仍能保持其分离性能。使用丙烯再生这些 CMSM 导致 O ₂渗透率和 O ₂ /N ₂渗透率增加老化 CMSM 的选择性。通过吸附等温线、FTIR、XPS和拉曼光谱评估了氧化学吸附和丙烯后处理钝化和再生的影响。评估O ₂和N _{2 的}传输特性。丙烯后处理减少了 CMSM 表面的含氧基团的比例，导致孔隙扩大，改变了气体的吸附动力学。这项工作中提出的结果证明了这种类型的膜在高性能和稳定性的气体分离方面的工业吸引力。