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CO2/CH4 and He/N2 Separation Properties and Water Permeability Valuation of Mixed Matrix MWCNTs-Based Cellulose Acetate Flat Sheet Membranes: A Study of the Optimization of the Filler Material Dispersion Method

  • The main scope of this work is to develop nano-carbon-based mixed matrix celluloseacetate membranes (MMMs) for the potential use in both gas and liquid separation processes. Forthis purpose, a variety of mixed matrix membranes, consisting of cellulose acetate (CA) polymerand carbon nanotubes as additive material were prepared, characterized, and tested. Multi-walledcarbon nanotubes (MWCNTs) were used as filler material and diacetone alcohol (DAA) as solvent.The first main objective towards highly efficient composite membranes was the proper preparationof agglomerate-free MWCNTs dispersions. Rotor-stator system (RS) and ultrasonic sonotrode (USS)were used to achieve the nanofillers’ dispersion. In addition, the first results of the application of thethree-roll mill (TRM) technology in the filler dispersion achieved were promising. The filler material,MWCNTs, was characterized by scanning electron microscopy (SEM) and liquid nitrogen (LN2)adsorption-desorption isotherms at 77 K. The derivatives CA-based mixed matrix membranes werecharacterized by tensile strength and water contact angle measurements, impedance spectroscopy,gas permeability/selectivity measurements, and water permeability tests. The studied membranesprovide remarkable water permeation properties, 12–109 L/m2/h/bar, and also good separationfactors of carbon dioxide and helium separations. Specifically, a separation factor of 87 for 10%He/N2feed concentration and a selectivity value of 55.4 for 10% CO2/CH4feed concentrationwere achieved.

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Verfasserangaben:Tobias Esser, Tobias Wolf, Tim Schubert, Jan Benra, Stefan Forero, George Maistros, Stéphan Barbe, George V. Theodorakopoulos, Dionysios S. Karousos, Andreas A. Sapalidis, Evangelos P. Favvas
URN:urn:nbn:de:hbz:832-epub4-16551
DOI:https://doi.org/10.3390/nano11020280
ISSN:2079-4991
Titel des übergeordneten Werkes (Englisch):Nanomaterials
Jahr der Fertigstellung:2021
Verlag:MDPI
Dokumentart:Wissenschaftlicher Artikel
Sprache:Englisch
Datum des Hochladens:07.05.2021
Freies Schlagwort / Tag:CO<sub>2</sub> separation; Cellulose acetate; Filler dispersion; Impedance spectroscopy; Mixed matrix membranes (MMMs); Rotor-stator system (RS); Ultrasonic sonotrode (USS)
Jahrgang:11
Ausgabe / Heft:2
Seitenzahl:21
Fakultäten und Zentrale Einrichtungen:Anlagen, Energie- und Maschinensysteme (F09) / Fakultät 09 / Institut Anlagen und Verfahrenstechnik
DDC-Sachgruppen:500 Naturwissenschaften und Mathematik
Open Access:Open Access
DeepGreen:DeepGreen
Lizenz (Deutsch):License LogoCreative Commons - CC BY - Namensnennung 4.0 International