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dc.contributor.authorLlosa Tanco, Margot A.
dc.contributor.authorPacheco Tanaka, David A.
dc.contributor.authorRodrigues, Sandra
dc.contributor.authorTexeira, Miguel
dc.contributor.authorMendes, Adelio
dc.date.accessioned2016-04-20T10:20:51Z
dc.date.available2016-04-20T10:20:51Z
dc.date.issued2015-05-04
dc.identifier.citationInternational journal o f hydrogen energy 40 ( 2015 ) 5653 - 5663en
dc.identifier.issn1879-3487en
dc.identifier.urihttp://hdl.handle.net/11556/206
dc.description.abstractSupported composite alumina-carbon molecular sieve membranes (c-CMSM) were prepared from in house prepared novolac phenolic resin loaded with boehmite nanoparticles in a single dipping-drying-carbonization step. A porous a-alumina tube support was dipped into a N-methyl-2-pyrrolidone solution containing polymerized novolac resin loaded with boehmite, subsequently dried at 100 C and carbonized at 500 C under nitrogen environment. The structure, morphology and performance of the membranes were examined by scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), carbon dioxide adsorption and permeation of N2, O2, He, H2 and CO2. SEM showed carbon membranes with a thin and very uniform layer with a thickness of ca. 3 mm CO2 adsorption isotherms indicated that the produced carbon membranes presented a microporous structure. The c-CMSM exhibited good gas separation properties. The permselectivity surpass the Robeson upper bound for polymeric membranes, especially regarding ideal permselectivities of pairs H2/N2 ¼ 117, and He/O2 ¼ 49. Aging effects were observed after membrane exposure to ambient air. However with a thermal treatment under nitrogen atmosphere the permeance of nitrogen increases.en
dc.description.sponsorshipPortuguese Foundation for Science and Technologyen
dc.language.isoengen
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDen
dc.titleComposite-alumina-carbon molecular sieve membranes prepared from novolac resin and boehmite. Part I: Preparation, characterization and gas permeation studiesen
dc.typearticleen
dc.identifier.doi10.1016/j.ijhydene.2015.02.112en
dc.isiYesen
dc.rights.accessRightsembargoedAccessen
dc.subject.keywordsCarbon membranesen
dc.subject.keywordsComposite Membranesen
dc.subject.keywordsGas separationen
dc.subject.keywordsNanoparticlesen
dc.subject.keywordsPhenolic resinsen
dc.subject.keywordsNovolacen


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