Modification of polyetherimide membranes with ZIFs fillers for CO2 separation
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Otros documentos de la autoría: Vega, J.; Andrio, Andreu; Lemus, A. A.; Díaz, J.A.I.; Del Castillo, Luis F.; Gavara, R.; Compañ, Vicente
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Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
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INVESTIGACIONMetadatos
Título
Modification of polyetherimide membranes with ZIFs fillers for CO2 separationAutoría
Fecha de publicación
2019Editor
ElsevierISSN
1383-5866; 1873-3794Cita bibliográfica
Vega, J.; Andrio, A.; Lemus, A.; Díaz, J.; Del Castillo, L.; Gavara, R.; Compañ Moreno, V. Modification of polyetherimide membranes with ZIFs fillers for CO2 separation. Separation and Purification Technology, 212, (2019). p. 474-482. https://doi.org/10.1016/j.seppur.2018.11.033Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://www.sciencedirect.com/science/article/pii/S1383586618328983Versión
info:eu-repo/semantics/submittedVersionPalabras clave / Materias
Resumen
Flat hybrid membranes composed of polyetherimide (PEI) as matrix and zeolitic imidazolate frameworks (ZIFs) as fillers at concentrations of 10 and 20 wt% were prepared. Apparent permeability coefficient and apparent ... [+]
Flat hybrid membranes composed of polyetherimide (PEI) as matrix and zeolitic imidazolate frameworks (ZIFs) as fillers at concentrations of 10 and 20 wt% were prepared. Apparent permeability coefficient and apparent diffusivity coefficient of gases (CO2 and N2) for these hybrid membranes (PZIFs) were determined by the “time-lag” method. The experimental conditions used were from 25 °C to 55 °C with pressures of 2, 3 and 5 bar. The PZIFs with fillers of ZIF-8 (PZ-Zn) and ZIF-67 (PZ-Co) showed apparent selectivities () of 39.6 and 27.5, respectively, higher than the of the reference membrane PEI, while the membrane with filler of ZIF-Mix (PZ-Zn/Co) showed the lowest
selectivity of 10.3 in the membrane series (under conditions of 25 °C and 2 bar). It is proposed that the selectivity of the membrane series can be attributed to two critical factors: the particle size/distribution ratio in the polymer base and sorption of CO2 at local sites of the bimetallic mixture.
On the other hand, gas permeation studies (O2, CO2 and CH4, and CO2/CH4 and CO2/C2H4 mixtures), were carried out in the series of PZIFs membranes. Permeability data were obtained by an isostatic method based on a permeation cell connected in series to a gas chromatograph where the rate of permeated gases was analyzed until a stationary state was reached. The complementary characterization techniques were: scanning electron microscopy, thermogravimetric analysis, and powder X-ray diffraction, which support the existence of the amorphous/crystalline phases of the PZIFs. [-]
Publicado en
Separation and Purification Technology, 2019, vol. 212, p. 474-482Proyecto de investigación
AcknowledgmentThis research has been supported by the ENE/2015-69203-R pro-ject, granted by the Ministerio de Economía y Competitividad(MINECO), Spain; Also authors are grateful to UNAM-DGAPA-PAPIITprojects IG-100185, and IG-114818.This study was partially supported by the CONACyT (Mexico) pro-jects 2013-05-231461 and CB-2014-01-235840.Derechos de acceso
© 2018 Elsevier B.V. All rights reserved
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