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dc.creatorMiguel Teixeira
dc.creatorSandra C.Rodrigues
dc.creatorMarta Campo
dc.creatorDavid A. Pacheco Tanaka
dc.creatorMargot A. Llosa Tanco
dc.creatorLuís M. Madeira
dc.creatorJosé M. Sousa
dc.creatorAdélio Mendes
dc.description.abstractComposite carbon molecular sieve membranes (c-CMSM) were prepared in a single dipping-drying-carbonizationstep from phenolic resin solutions (12.5-15 wt.%) loaded with boehmite nanoparticles (0.5-1.2 wt.%). A carbon matrixwith well-dispersed Al2O3 nanowires was formed from the decomposition of the resin and dehydroxylation ofboehmite. The effect of the carbon/Al2O3 ratio on the porous structure of the c-CMSM was accessed based on the poresize distribution and gas permeation toward N2, O2, CO2, He, H2, C3H6 and C3H8. c-CMSM with higher carbon/Al2O3ratios had a more open porous structure, exhibiting higher permeabilities and lower permselectivities. c-CMSMperformance was above the upper bound curves for polymeric membranes for several gas pairs, particularly forC3H6/C3H8 (permeability toward C3H6 of 420 barrer and permselectivity of 18.1 for a c-CMSM with carbon/Al2O3 ratioof 4.4).Unsupported films were also prepared (carbon/Al2O3 ratio 7.3) and crushed into small flakes. Equilibrium isothermsof H2, N2, O2, CO2, C3H8 and C3H6 at 293 K were determined on these flakes to obtain the kinetic and adsorptionselectivities toward gas pairs of interest; obtained adsorption and diffusion coefficients accurately predicted thepermeabilities of all studied gases except CO2 (experimental and predicted permeabilities of 1148 and 154 barrer,respectively).
dc.relationinfo:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projectos de I&DT em Todos os Domínios Científicos/PTDC/EQU-EQU/114944/2009/Desenvolvimento de um sistema autorregenerativo para a remoção de CO2 de sistemas anestésicos em circuito fechado/PTDC/EQU-EQU/114944/2009
dc.subjectEngenharia química, Engenharia química
dc.subjectChemical engineering, Chemical engineering
dc.titleBoehmite-Phenolic Resin Carbon Molecular Sieve Membranes - Permeation and Adsorption Studies
dc.typeArtigo em Revista Científica Internacional
dc.contributor.uportoFaculdade de Engenharia
dc.subject.fosCiências da engenharia e tecnologias::Engenharia química
dc.subject.fosEngineering and technology::Chemical engineering
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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