78235 20191122145055.0 doi 10.1016/j.seppur.2017.10.039 sideral 101843 ART-2018-101843 eng Zamidi Ahmad, M. Enhancement of CO2/CH4 separation performances of 6FDA-based co-polyimides mixed matrix membranes embedded with UiO-66 nanoparticles 2018 Access copy available to the general public Unrestricted Metal-organic frameworks (MOFs) incorporation into mixed matrix membranes (MMMs) is gaining more attention due to the combined advantages of high separation performance and easy processability. Nanoparticles (NPs) of CO2-philic MOF UiO-66 (Zr-BDC) were synthesized with high surface area and ca. 50 nm particle size (and also for comparison with 100 and 200 nm sizes). They were incorporated into three 6FDA-based co-polyimides (namely 6FDA-BisP, 6FDA-ODA, and 6FDA-DAM), forming MMMs with loadings in the 4–23 wt% range. The NPs and MMMs were characterized accordingly by XRD, BET, SEM, TEM, FTIR, and TGA. CO2 and CH4 isotherms on the NPs were measured by a static volumetric method at the pressure up to 10 bar. Fractional free volume (FFV) was calculated using solid density, measured by pycnometer. Gas separation performance was evaluated using a feed composition of 50%:50% CO2:CH4 binary mixture at 35 °C and a pressure difference of 2 bar. The presence of UiO-66 NPs in the continuous 6FDA-BisP and 6FDA-ODA co-polyimides improved both CO2 permeability and CO2/CH4 selectivity by 50–180% and 70–220%, respectively. In the case of 6FDA-DAM MMMs, the CO2 permeability was significantly improved by 92%, while maintaining the CO2/CH4 selectivity. The best results in terms of CO2/CH4 selectivity were 41.9 for 6FDA-BisP (17 wt% filler loading, 108 Barrer of CO2), 57.0 for 6FDA-ODA (7 wt% filler loading, 43.3 Barrer of CO2) and 32.0 for 6FDA-DAM (8 wt% filler loading, 1728 Barrer of CO2). info:eu-repo/grantAgreement/ES/DGA/FSE info:eu-repo/grantAgreement/ES/DGA/T05 info:eu-repo/grantAgreement/EUR/EACEA-EC/ERASMUS MUNDUS-2009-2013 info:eu-repo/grantAgreement/EUR/EACEA-EC/FPA-2011-0014 info:eu-repo/grantAgreement/EUR/EACEA-EC/SGA-2012-1719 info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2016-77290-R info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 5.107 2018 ENGINEERING, CHEMICAL 14 / 138 = 0.101 2018 Q1 T1 1.158 2018 Filtration and Separation 2018 Q1 Analytical Chemistry 2018 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion (orcid)0000-0001-7702-9619 Navarro, M. Lhotka, M. (orcid)0000-0002-9934-1707 Zornoza, B. Universidad de Zaragoza (orcid)0000-0002-4954-1188 Téllez, C. Universidad de Zaragoza Fila, V. (orcid)0000-0003-1512-4500 Coronas, J. Universidad de Zaragoza 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 192 (2018), 465-474 Sep. Purif. Technol. SEPARATION AND PURIFICATION TECHNOLOGY 1383-5866 1437371 http://zaguan.unizar.es/record/78235/files/texto_completo.pdf Postprint 57497 http://zaguan.unizar.es/record/78235/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:78235 articulos driver 2019-11-22-14:45:34 ARTICLE