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Novel materials for membrane gas separation
Giel, Verena ; Pientka, Zbyněk (advisor) ; Izák, Pavel (referee) ; Vopička, Ondřej (referee)
The implementation of polymer membranes in gas separation applications has been investigated to a great extent. Nevertheless, only a few types of polymers are used in commercial applications, disclosing the need for new materials with superior membrane performance to make membrane processes a more competitive technology over the conventional ones. Based on this context, this work focuses on the development of new polymeric membranes. Polyaniline (PANI), a multifaceted polymer that can change its structural properties upon various modification procedures, was chosen as membrane material. PANI membranes possess attractive O2/N2 selectivities, wherefore it is an interesting candidate for the use in gas separation applications, such as generation of oxygen-enriched air or inert gas generation. However, membranes made from neat PANI are suffering from brittleness and thus create leak paths through the membrane. Therefore PANI was blended with polybenzimidazole (PBI), a temperature stable polymer with good film-forming properties facilitating the preparation of thin, stable polymer films. Furthermore, several techniques were investigated including acid-doping, thermal treatment, and addition of titanate nanotubes (TiNTs) to enhance the separation properties. The materials that have been prepared are: 1)...
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Novel materials for membrane gas separation
Giel, Verena ; Pientka, Zbyněk (advisor) ; Izák, Pavel (referee) ; Vopička, Ondřej (referee)
The implementation of polymer membranes in gas separation applications has been investigated to a great extent. Nevertheless, only a few types of polymers are used in commercial applications, disclosing the need for new materials with superior membrane performance to make membrane processes a more competitive technology over the conventional ones. Based on this context, this work focuses on the development of new polymeric membranes. Polyaniline (PANI), a multifaceted polymer that can change its structural properties upon various modification procedures, was chosen as membrane material. PANI membranes possess attractive O2/N2 selectivities, wherefore it is an interesting candidate for the use in gas separation applications, such as generation of oxygen-enriched air or inert gas generation. However, membranes made from neat PANI are suffering from brittleness and thus create leak paths through the membrane. Therefore PANI was blended with polybenzimidazole (PBI), a temperature stable polymer with good film-forming properties facilitating the preparation of thin, stable polymer films. Furthermore, several techniques were investigated including acid-doping, thermal treatment, and addition of titanate nanotubes (TiNTs) to enhance the separation properties. The materials that have been prepared are: 1)...
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Gas and Vapour Transport and Mechanical Properties of Carbon Nanotube and Carbon Fibre-Reinforcement of Ethylene-Octene Copolymer Membranes
Sedláková, Zuzana ; Clarizia, G. ; Bernardo, P. ; Jansen, J.C. ; Slobodian, P. ; Svoboda, P. ; Kárászová, Magda ; Friess, K. ; Izák, Pavel
Helium, hydrogen, nitrogen, oxygen, methane and carbon dioxide were used for gas permeation rate measurements. Theoretical Maxwell’s model was used to predict and interpret gas transport properties in MMMs. Vapour transport properties were studied for aliphatic hydrocarbon (hexane), aromatic compound (toluene), alcohol (ethanol), as well as water. Organic vapours result more permeable than permanent gases in EOC-based membranes, with toluene and hexane permeabilities being about two orders of magnitude higher than permanent gas permeability. Carbon-filled membranes show that the EOC is an organophilic material that offers perspectives for application in gas/vapour separation with improved mechanical resistance.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22014090110400 - PDF
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Upgrading of Biogas by Supported Liquid Membranes
Kárászová, Magda ; Vejražka, Jiří ; Veselý, Václav ; Izák, Pavel
The contribution investigate the basic characteristics of the supported ionic liquid membrane consisting of an ionic liquid [Emim] [Tf2N] and the porous support of polyvinylidenflouride. The membrane was performed during permeation into the carrier gas. The permeability of pure gases and mixtures of different composition were investigated. The obtained data were compared with the literature.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22013102515210 - PDF
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