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- W2508298952 abstract "Abstract High performance thermally-rearranged (TR) and carbon molecular sieve (CMS) membranes made from an intrinsically microporous polymer precursor PIM-6FDA-OH are reported for the separation of propylene from propane. Thermal rearrangement of PIM-6FDA-OH to the corresponding polybenzoxazole (PBO) membrane resulted in a pure-gas C 3 H 6 /C 3 H 8 selectivity of 15 and C 3 H 6 permeability of 14 Barrer, positioning it above the polymeric C 3 H 6 /C 3 H 8 upper bound. For the first time, the C 3 H 6 /C 3 H 8 mixed-gas properties of a TR polymer were investigated and showed a C 3 H 6 permeability of 11 Barrer and C 3 H 6 /C 3 H 8 selectivity of ~11, essentially independent of feed pressure up to 5 bar. The CMS membrane made by treatment at 600 °C showed further improvement in performance as demonstrated with a pure-gas C 3 H 6 /C 3 H 8 selectivity of 33 and a C 3 H 6 permeability of 45 Barrer. The mixed-gas C 3 H 6 /C 3 H 8 selectivity dropped from 24 to 17 from 2 to 5 bar feed pressure due to a decrease in C 3 H 6 permeability most likely caused by competitive sorption without any evidence of plasticization." @default.
- W2508298952 created "2016-09-16" @default.
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- W2508298952 date "2016-12-01" @default.
- W2508298952 modified "2023-09-24" @default.
- W2508298952 title "Spirobisindane-based polyimide as efficient precursor of thermally-rearranged and carbon molecular sieve membranes for enhanced propylene/propane separation" @default.
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- W2508298952 doi "https://doi.org/10.1016/j.memsci.2016.08.057" @default.
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