On the molecular mechanisms for the H2/CO2 separation performance of zeolite imidazolate framework two-layered membranes
Cacho Bailo, Fernando ; Matito-Martos, Ismael ; Pérez-Carbajo, Julio ; Etxeberría-Benavides, Miren ; Karvan, Oguz ; Sebastián, Víctor ; Calero, Sofía ; Téllez, Carlos ; Coronas, Joaquín
Resumen: Double-layered zeolitic imidazolate framework (ZIF) membranes were fabricated inside polyimide P84 hollow fibers by a step-synthesis conducted by microfluidic technology and applied to pre-combustion gas separation. Our hypothesis, based on the information provided by a combination of molecular simulation and experiments, is that a CO2 adsorption reduction on the surface of the ZIF-9 would enhance the molecular sieving effect of this ZIF-9 layer and therefore the selectivity in the H2/CO2 mixture separation of the entire membrane. This reduction would be achieved by means of a less-CO2-adsorptive methylimidazolate-based ZIF-67 or ZIF-8 layer coating the ZIF-9. ZIF-8/ZIF-9 and ZIF-67/ZIF-9 double-layered membranes were prepared and characterized by XRD, FTIR, SEM, FIB, TEM and EDS. This unprecedented strategy led to a H2/CO2 separation selectivity of 9.6 together with a 250 GPU H2 permeance at 150 °C, showing a significant improvement with respect to the pure ZIF-9 membrane. Double-layered membranes also showed higher apparent CO2 activation energies than single-layered membranes, attributable to a diminished adsorption.
Idioma: Inglés
DOI: 10.1039/C6SC02411D
Año: 2017
Publicado en: CHEMICAL SCIENCE 8 (2017), 325-333
ISSN: 2041-6520
Factor impacto JCR: 9.063 (2017)
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 18 / 171 = 0.105 (2017) - Q1 - T1
Factor impacto SCIMAGO: 4.508 - Chemistry (miscellaneous) (Q1)
Financiación: info:eu-repo/grantAgreement/ES/DGA/T05
Financiación: info:eu-repo/grantAgreement/EC/FP7/279520/EU/Towards more efficient materials for technological processes/RASPA
Financiación: info:eu-repo/grantAgreement/EC/FP7/321642/EU/Development of a microfluidic platform to produce nanomaterials and assessment on new nanotechnology applications/PLATFORM2NANO
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2013-40566-R
Tipo y forma: Article (Published version)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.
Exportado de SIDERAL (2019-07-09-11:58:42)
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Idioma: Inglés
DOI: 10.1039/C6SC02411D
Año: 2017
Publicado en: CHEMICAL SCIENCE 8 (2017), 325-333
ISSN: 2041-6520
Factor impacto JCR: 9.063 (2017)
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 18 / 171 = 0.105 (2017) - Q1 - T1
Factor impacto SCIMAGO: 4.508 - Chemistry (miscellaneous) (Q1)
Financiación: info:eu-repo/grantAgreement/ES/DGA/T05
Financiación: info:eu-repo/grantAgreement/EC/FP7/279520/EU/Towards more efficient materials for technological processes/RASPA
Financiación: info:eu-repo/grantAgreement/EC/FP7/321642/EU/Development of a microfluidic platform to produce nanomaterials and assessment on new nanotechnology applications/PLATFORM2NANO
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2013-40566-R
Tipo y forma: Article (Published version)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. Exportado de SIDERAL (2019-07-09-11:58:42)
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Record created 2017-09-21, last modified 2019-07-09