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Comparison of pure and mixed gas permeation of the highly fluorinated\npolymer of intrinsic microporosity PIM-2 under dry and humid conditions:\nExperiment and modelling.
- 1.
SYSNO ASEP 0541296 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Comparison of pure and mixed gas permeation of the highly fluorinated
polymer of intrinsic microporosity PIM-2 under dry and humid conditions:
Experiment and modelling.Author(s) Fuoco, A. (IT)
Satilmis, B. (TR)
Uyar, T. (US)
Monteleone, M. (IT)
Esposito, E. (IT)
Muzzi, Ch. (IT)
Tocci, E. (IT)
Longo, M. (IT)
De Santo, M.P. (IT)
Lanč, M. (CZ)
Friess, K. (CZ)
Vopička, O. (CZ)
Izák, Pavel (UCHP-M) RID, ORCID, SAI
Jansen, J.C. (IT)Article number 117460 Source Title Journal of Membrane Science. - : Elsevier - ISSN 0376-7388
Roč. 594, JAN 15 (2020)Number of pages 12 s. Language eng - English Country NL - Netherlands Keywords polymer of intrinsic microporosity ; gas separation membrane ; humid gas permeation Subject RIV CI - Industrial Chemistry, Chemical Engineering OECD category Chemical process engineering R&D Projects GA18-05484S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UCHP-M - RVO:67985858 UT WOS 000495572700018 EID SCOPUS 85072567784 DOI 10.1016/j.memsci.2019.117460 Annotation This manuscript describes the gas separation performance of PIM-2, a partially fluorinated linear copolymer synthesized from 5,5′,6,6′-tetrahydroxy-3,3,3′,3′-tetramethylspirobisindane (TTSBI) and decafluorobiphenyl (DFBP). As one of the early members of the family of polymers of intrinsic microporosity, it had never been tested as a gas separation membrane because of insufficient mechanical resistance. This has been solved only recently, allowing the preparation of robust self-standing films. Molecular modelling studies demonstrated a high fractional free volume (34%) and an elevated surface area (642m2 g−1), and the latter is in good agreement with experimental BET results. Pure gas permeabilities measured on a fixed-volume time-lag instrument at 1 barcompare well with the results of mixed separation tests on a variable volume setup from 1-6 bar(a). Molecular modelling and independent sorption measurements on a gravimetric sorption balance both show strong dualmode sorption behaviour, especially for CO2 and to a lesser extent for CH4. Temperature-dependent pure gas permeation measurements show typical Arrhenius behaviour, with a clear increase in the activation energy for diffusion with the increasing molecular size of the gas, indicating high size-selectivity. This is in agreement with the highly rigid PIM structure, determined by AFM force spectroscopy measurements. The dual-mode behaviour results in a moderate pressure dependence of the CO2 permeability and the CO2/N2 and CO2/CH4 selectivity, all slightly decreasing with increasing pressure. The presence of humidity in the gas stream has a remarkable small effect on the membrane performance, which is probably due to the high fluorine content and the consequently low water vapour solubility in the polymer, as confirmed by gravimetric sorption measurements. The manuscript describes an extensive study on the structure-property relationships in PIM-2. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2022 Electronic address http://hdl.handle.net/11104/0318877
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