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CO2 separation of fluorinated 6FDA-based polyimides, performance-improved ZIF-incorporated mixed matrix membranes and gas permeability model evaluations.
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SYSNO ASEP 0564059 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název CO2 separation of fluorinated 6FDA-based polyimides, performance-improved ZIF-incorporated mixed matrix membranes and gas permeability model evaluations. Tvůrce(i) Ahmad, M. Z. (CZ)
Izák, Pavel (UCHP-M) RID, ORCID, SAI
Fíla, V. (CZ)Číslo článku 108611 Zdroj.dok. Journal of Environmental Chemical Engineering. - : Elsevier - ISSN 2213-2929
Roč. 10, č. 6 (2022)Poč.str. 13 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova 6FDA-based polyimides ; CO 2 separation ; Maxwell Obor OECD Chemical process engineering CEP EF16_026/0008413 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy LTAUSA19038 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access s časovým embargem (01.01.2025) Institucionální podpora UCHP-M - RVO:67985858 UT WOS 000875614200004 EID SCOPUS 85144301197 DOI 10.1016/j.jece.2022.108611 Anotace In this study, we compare a newly introduced high free volume fluorinated 6FDA-polyimide, namely 6FDA-bisP, with excellent gas separation properties (CO2 permeability, PCO2 of 35.3 Barrer, CO2/CH4 selectivity, alpha CO2/CH4 of 25.5) to the well-investigated, lower free volume 6FDA-ODA (PCO2 = 25.9 Barrer, alpha CO2/CH4 = 20.6). Their gas separation performances were improved in the form of mixed matrix membranes (MMMs) with size sieving zeolitic imidazolate framework (ZIF-8, particle range of <160 nm) addition between 5 and 20 wt% loadings. XRD, BET, FTIR, TGA, DSC, SEM, and TEM were used to characterize the nanoparticles and MMMs. Solid density was obtained from He pycnometry analysis (pressurized cycle test between 2 and 20 bar at 20 <degrees>C) to calculate the free fractional volume (FFV). Using an equimolar CO2 and CH4 mixture, gas separation performance was evaluated at a constant 5 bar, at 25 degrees C. The optimum loading was achieved at 15 wt% for 6FDA-bisP with MMM performance of PCO2 = 81.2 Barrer and alpha CO2/CH4 = 35.0, whereas 10 wt% for 6FDA-ODA (PCO2 = 42.2 Barrer, alpha CO2/CH4 = 44.8). The MMMs showed superior performances than the currently relevant polymers in industrial separation processes. Four different gas permeability models: Maxwell, Maxwell-Wagner-Sillar, Higuchi and Lewis Nielsen, were utilized to analyze the obtained data. Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2023 Elektronická adresa https://hdl.handle.net/11104/0335804
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