Boehmite-phenolic resin carbon molecular sieve membranes-Permeation and adsorption studies

Simple item page
dc.contributor.authorTeixeira, Miguel
dc.contributor.authorRodrigues, Sandra C.
dc.contributor.authorCampo, Marta
dc.contributor.authorPacheco Tanaka, David A.
dc.contributor.authorLlosa Tanco, Margot A.
dc.contributor.authorMadeira, Luís M.
dc.contributor.authorSousa, José M.
dc.contributor.authorMendes, Adélio
dc.contributor.institutionTECNOLOGÍA DE MEMBRANAS E INTENSIFICACIÓN DE PROCESOS
dc.date.accessioned2024-07-24T12:07:20Z
dc.date.available2024-07-24T12:07:20Z
dc.date.issued2014-11-01
dc.descriptionPublisher Copyright: © 2014 The Institution of Chemical Engineers.
dc.description.abstractComposite carbon molecular sieve membranes (c-CMSM) were prepared in a single dipping-drying-carbonization step from phenolic resin solutions (12.5-15wt.%) loaded with boehmite nanoparticles (0.5-1.2wt.%). A carbon matrix with well-dispersed Al2O3 nanowires was formed from the decomposition of the resin and dehydroxylation of boehmite. The effect of the carbon/Al2O3 ratio on the porous structure of the c-CMSM was accessed based on the pore size distribution and gas permeation toward N2, O2, CO2, He, H2, C3H6 and C3H8. c-CMSM with higher carbon/Al2O3 ratios had a more open porous structure, exhibiting higher permeabilities and lower permselectivities. c-CMSM performance was above the upper bound curves for polymeric membranes for several gas pairs, particularly for C3H6/C3H8 (permeability toward C3H6 of 420 barrer and permselectivity of 18.1 for a c-CMSM with carbon/Al2O3 ratio of 4.4).Unsupported films were also prepared (carbon/Al2O3 ratio 7.3) and crushed into small flakes. Equilibrium isotherms of H2, N2, O2, CO2, C3H8 and C3H6 at 293K were determined on these flakes to obtain the kinetic and adsorption selectivities toward gas pairs of interest; obtained adsorption and diffusion coefficients accurately predicted the permeabilities of all studied gases except CO2 (experimental and predicted permeabilities of 1148 and 154 barrer, respectively).en
dc.description.sponsorshipMiguel Teixeira and Margot Tanco are grateful to the Portuguese Foundation for Science and Technology (FCT) for their doctoral grants (references SFRH/BD/24768/2005 and SFRH/BD/61898/2009 , respectively). Marta Campo also acknowledges FCT for her post-doctoral grant (reference SFRH/BPD/65377/2009). The authors also acknowledge financing from FCT through the projects POCTI/EQU/59344/2004, POCTI/EQU/59345/2004 and PTDC/EQU-EQU/114944/2009. Finally, the authors are thankful to CEMUP for the SEM analyses (REEQ/1062/CTM/2005 and REDE/1512/RME/2005 funding provided by FCT).
dc.description.statusPeer reviewed
dc.format.extent13
dc.identifier.citationTeixeira , M , Rodrigues , S C , Campo , M , Pacheco Tanaka , D A , Llosa Tanco , M A , Madeira , L M , Sousa , J M & Mendes , A 2014 , ' Boehmite-phenolic resin carbon molecular sieve membranes-Permeation and adsorption studies ' , Chemical Engineering Research and Design , vol. 92 , no. 11 , pp. 2668-2680 . https://doi.org/10.1016/j.cherd.2013.12.028
dc.identifier.doi10.1016/j.cherd.2013.12.028
dc.identifier.issn0263-8762
dc.identifier.urihttps://hdl.handle.net/11556/3756
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=84912533136&partnerID=8YFLogxK
dc.language.isoeng
dc.relation.ispartofChemical Engineering Research and Design
dc.relation.projectIDFundação para a Ciência e a Tecnologia, FCT, SFRH/BD/61898/2009-REEQ/1062/CTM/2005-SFRH/BD/24768/2005-SFRH/BPD/65377/2009
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subject.keywordsBoehmite nanoparticles
dc.subject.keywordsCarbon
dc.subject.keywordsComposite membrane
dc.subject.keywordsGas separation
dc.subject.keywordsOlefin purification
dc.subject.keywordsPhenolic resin
dc.subject.keywordsGeneral Chemistry
dc.subject.keywordsGeneral Chemical Engineering
dc.titleBoehmite-phenolic resin carbon molecular sieve membranes-Permeation and adsorption studiesen
dc.typejournal article
Files