Characterization of highly selective microporous carbon hollow fiber membranes prepared from a commercial co-polyimide precursor (Journal article)

Favvas, E.P.Kouvelos, E.P.Romanos, G.E.Pilatos, G.I.Mitropoulos, A.C.Kanellopoulos, N.K.

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dc.contributor.authorFavvas, E.P.en
dc.contributor.authorKouvelos, E.P.en
dc.contributor.authorRomanos, G.E.en
dc.contributor.authorPilatos, G.I.en
dc.contributor.authorMitropoulos, A.C.en
dc.contributor.authorKanellopoulos, N.K.en
dc.rightsDefault License-
dc.subjectCarbon hollow fibersen
dc.subjectCo-polyimide precursoren
dc.subjectKinetic selectivityen
dc.titleCharacterization of highly selective microporous carbon hollow fiber membranes prepared from a commercial co-polyimide precursoren
heal.generalDescriptionVolume 15, Issue 6, pp. 625-633en
heal.generalDescriptionInstitute of Physical Chemistry, NCSR Demokritos, 153 10 Agia Paraskevi, Attikis, Greeceen
heal.generalDescriptionDepartment of Petroleum and Natural Gas Technology, Cavala Institute of Technology, 654 04 St. Lucas, Cavala, Greeceen
heal.classificationCarbon fibersen
heal.recordProviderΔεν υπάρχει πληροφορίαel
heal.bibliographicCitationΔεν υπάρχει πληροφορίαel
heal.abstractIn this work, the preparation of gas separating carbon hollow fiber membranes based on a 3,3′4,4′- benzophenone tetracarboxylic dianhydride and 80% methylphenylene-diamine + 20% methylene diamine co-polyimide precursor (BTDA-TDI/MDI, Ρ84 Lenzing GmbH), their permselectivity properties as well as details of the carbon nanostructure are reported. Hollow fibers were initially prepared by the dry/wet phase inversion process in a spinning set-up, while the spinning dope consisted of P84 as polymer and NMP as solvent. The developed polymer hollow fibers were further carbonized in nitrogen at temperatures up to 1173 K. Thermogravimetric analysis was used to investigate the weight loss during the carbonization process. The nitrogen, methane and carbon dioxide adsorption capacity of the prepared materials was determined gravimetrically at 273 and 298 K and hydrogen adsorption experiments were performed at 77 K up to 1 bar. Scanning electron microscopy was used to elucidate the morphological characteristics and the nanostructure while H 2 sorption at 77 K was applied to evaluate the microporosity of the developed carbon hollow fiber membranes. In all cases, the permeability (Barrer) of He, H2, CH4, CO2, O2 and N 2 were measured at atmospheric pressure and temperatures 313, 333 and 373 K and were found higher than those of the precursor. Moreover, the calculated permselectivity values were significantly improved. The developed carbon fibers exhibit rather low H2 permeance values (8.2 GPU or 2.74 × 10-9 mol/m2•s•Pa) with a highest H 2/CH4 selectivity coefficient of 843 at 373 K. © 2007 Springer Science+Business Media, LLC.en
heal.publisherΔεν υπάρχει πληροφορίαel
heal.journalNameJournal of Porous Materialsen
heal.type.enJournal articleen
heal.type.elΆρθρο περιοδικούel
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