Enhanced ethylene/ethane selectivity of PI membrane with functionalized zeolite addition by Soon Hyeong So, TaeHoon Kim, Minsu Kim, Eunji Choi, Yun Ho Kim, Changbum Jo, Dae Woo Kim

“…The enhanced selectivity of MMMs is attributed to the increased solubility difference of ethylene by the addition of f-MOR, while diffusion selectivity is not improved by the filler. Under a binary mixed-feed gas, the MMM with 20 wt% f-MOR exhibited a drop in selectivity (2.5), indicating low-pressure plasticization-like behavior. …”
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Insight into CO2/CH4 separation by ionic liquids confined in MXene membrane from molecular level by Xiaochun Zhang, Peng Xu, Yunhan Kong, Yiming Liu, Xiangping Zhang

“…Furthermore, compared to 1-Ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][BF4]) and 1-Ethyl-3-methylimidazolium hexafluorophosphate ([EMIM][PF6]), MXene-confined 1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][TF2N]) is identified as the most effective for CO2/CH4 separation, owing to its superior CO2 solubility and highest diffusion selectivity.…”
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Recent advances in H2 purification and CO2 capture: Evolving from flat sheet to hollow fiber membranes by Jun Yi Teh, Wai Fen Yong

“…Additionally, H2/CO2 separation remains particularly challenging because H2, being diffusivity-selective, permeates more quickly through the membrane due to its smaller molecular size and higher kinetic energy, while CO2, being solubility-selective, has a high affinity for dissolving in most polymeric membranes. …”
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