A methodology for the morphological and physicochemical characterisation of asymmetric carbon hollow fiber membranes (Journal article)

Favvas, E.P.Romanos, G.E.Papageorgiou, S.K.Katsaros, F.K.Mitropoulos, A.C.Kanellopoulos, N.K.


 Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/7329
Carbon and activated carbon hollow fiber membranes were prepared from an asymmetric co-polyimide precursor through the application of common pyrolytic carbonization procedures followed by carbon dioxide activation. A complete analytical methodology, consisting of a combination of advanced static and dynamic techniques, is proposed as a tool to elucidate the asymmetric pore structure of the developed carbon membranes. More specific, the carbon hollow fiber morphology was investigated by scanning electron microscopy. The mean micropore size of the existing separating layers was defined by surface excess adsorption of the probe molecules H2, CO2, N2 and CH4. The micropore size distribution was derived by means of the Grand Canonical Monte Carlo simulation method, using the experimental data of either the H2 77K or both H2 and CO2 adsorption isotherms. In addition, single phase and relative permeability experiments revealed the coexistence of a small population of mesopores on the pore structure of the dense separating layers. Overall, the proposed methodology has been proved sufficient to distinguish the simultaneous occurrence of three separating layers in each of the developed membranes and discriminate between their different pore structures. © 2011 Elsevier B.V.
Institution and School/Department of submitter: Δεν υπάρχει πληροφορία
Subject classification: Carbon fibers
Keywords: Adsorption;Carbon hollow fibers;Gas selectivity;Permeability;Pore morphology characterization
URI: http://hdl.handle.net/123456789/7329
Publisher: Δεν υπάρχει πληροφορία
Item type: journalArticle
General Description / Additional Comments: Volume 375, Issue 1-Feb, pp. 113-123
http://www.scopus.com/inward/record.url?eid=2-s2.0-79955807791&partnerID=40&md5=7a8fb5fb292e788ff276bba86014eb0a
Institute of Physical Chemistry, NCSR Demokritos 153 10, Ag. Paraskevi Attikis, Greece
Dpt. of Petroleum and Natural Gas Technology, Cavala Institute of Technology, 654 04, St. Lucas, Cavala, Greece
Subject classification: Carbon fibers
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Item language: en
Item access scheme: free
Institution and School/Department of submitter: Δεν υπάρχει πληροφορία
Publication date: 2011
Bibliographic citation: Δεν υπάρχει πληροφορία
Abstract: Carbon and activated carbon hollow fiber membranes were prepared from an asymmetric co-polyimide precursor through the application of common pyrolytic carbonization procedures followed by carbon dioxide activation. A complete analytical methodology, consisting of a combination of advanced static and dynamic techniques, is proposed as a tool to elucidate the asymmetric pore structure of the developed carbon membranes. More specific, the carbon hollow fiber morphology was investigated by scanning electron microscopy. The mean micropore size of the existing separating layers was defined by surface excess adsorption of the probe molecules H2, CO2, N2 and CH4. The micropore size distribution was derived by means of the Grand Canonical Monte Carlo simulation method, using the experimental data of either the H2 77K or both H2 and CO2 adsorption isotherms. In addition, single phase and relative permeability experiments revealed the coexistence of a small population of mesopores on the pore structure of the dense separating layers. Overall, the proposed methodology has been proved sufficient to distinguish the simultaneous occurrence of three separating layers in each of the developed membranes and discriminate between their different pore structures. © 2011 Elsevier B.V.
Publisher: Δεν υπάρχει πληροφορία
Journal name: Journal of Membrane Science
Journal type: peer-reviewed
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