dc.contributor.author | Cacho-Bailo, Fernando | |
dc.contributor.author | Matito-Martos, Ismael | |
dc.contributor.author | Perez-Carbajo, Julio | |
dc.contributor.author | Etxeberría-Benavides, Miren | |
dc.contributor.author | Karvan, Oğuz | |
dc.contributor.author | Sebastián, Víctor | |
dc.contributor.author | Calero, Sofía | |
dc.contributor.author | Téllez, Carlos | |
dc.contributor.author | Coronas, Joaquín | |
dc.date.accessioned | 2017-03-08T15:07:54Z | |
dc.date.available | 2017-03-08T15:07:54Z | |
dc.date.issued | 2017 | |
dc.identifier.citation | Chem. Sci., 2017, 8, 325 | en |
dc.identifier.issn | 2041-6520 | en |
dc.identifier.uri | http://hdl.handle.net/11556/378 | |
dc.description.abstract | 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 H-2/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 H-2/CO2 separation selectivity of 9.6 together with a 250 GPU H-2 permeance at 150 degrees 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. | en |
dc.description.sponsorship | Financial support (MAT2013-40556-R) from the Spanish MINECO, the Aragon Government (DGA, T05) and the European Social Fund is gratefully acknowledged. We also acknowledge the use of the Servicio General de Apoyo a la Investigacion-SAI (Universidad de Zaragoza). F. C.-B. acknowledges his DGA predoctoral fellowship. V. S. acknowledges the support of the People Program (CIG-Marie Curie Actions, REA grant agreement no. 321642). I. M.-M. thanks the Spanish MINECO for his predoctoral fellowship. The European Research Council through an ERC Grant (ERC2011-StG-279520-RASPA) is also acknowledged. All the microscopy work was done in the Laboratorio de Microscopias Avanzadas at the Instituto de Nanociencia de Aragon (LMA-INA). The authors acknowledge the LMA-INA for offering access to their instruments and expertise. | en |
dc.language.iso | eng | en |
dc.publisher | ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND | en |
dc.rights | Attribution-NonCommercial 4.0 International | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc/4.0/ | * |
dc.title | On the molecular mechanisms for the H2/CO2 separation performance of zeolite imidazolate framework two-layered membranes | en |
dc.type | journal article | en |
dc.identifier.doi | 10.1039/c6sc02411d | en |
dc.isi | Yes | en |
dc.rights.accessRights | open access | en |
dc.subject.keywords | CARBON-DIOXIDE ADSORPTION | en |
dc.subject.keywords | MIXED-MATRIX MEMBRANES | en |
dc.subject.keywords | CO2 SEPARATION | en |
dc.subject.keywords | HYDROGEN SELECTIVITY | en |
dc.subject.keywords | COMPOSITE MEMBRANES | en |
dc.subject.keywords | PHASE-TRANSITION | en |
dc.subject.keywords | LINKER SYNTHESIS | en |
dc.subject.keywords | ZIF-90 MEMBRANE | en |
dc.subject.keywords | GAS SEPARATION | en |
dc.subject.keywords | HOLLOW-FIBER | en |
dc.identifier.essn | 2041-6539 | en |
dc.issue.number | 1 | en |
dc.journal.title | CHEMICAL SCIENCE | en |
dc.page.final | 333 | en |
dc.page.initial | 325 | en |
dc.volume.number | 8 | en |