doi:10.1002/aic.15011engZornoza, B.Téllez, C.Coronas, J.Esekhile, O.Koros, W.J.Mixed matrix membranes based on 6FDA polyimide with silica and zeolite microsphere dispersed phasesART-2015-92992Mixed matrix membranes (MMMs) prepared with 6FDA-DAM polymer using ordered mesoporous silica MCM-41 spheres (MSSs), Grignard surface functionalized MSSs (Mg-MSSs) and hollow zeolite spheres are studied to evaluate the effects of surface modification on performance. Performance near or above the so-called permeability-selectivity trade-off curve was achieved for the H2/CH4, CO2/N2, CO2/CH4, and O2/N2 systems. Two loadings (8 wt % and 16 wt %) of MSSs were tested using both constant volume and Wicke-Kallenbach sweep gas permeation systems. Besides single gas H2, CO2, O2, N2, and CH4 tests, mixed gas (50/50 vol %) selectivities were obtained for H2/CH4, CO2/N2, CO2/CH4, and O2/N2 and found to show enhancements vs. single gases for CO2 including cases. Mg-MSS/6FDA-DAM was the best performing MMM with H2/CH4, CO2/N2, CO2/CH4, and O2/N2 separation selectivities of 21.8 (794 Barrer of H2), 24.4 (1214 Barrer of CO2), 31.5 (1245 Barrer of CO2), and 4.3 (178 Barrer of O2), respectively.2015http://zaguan.unizar.es/record/6085210.1002/aic.15011http://zaguan.unizar.es/record/60852oai:zaguan.unizar.es:60852info:eu-repo/grantAgreement/ES/MINECO/MAT2013-40566-RAIChE Journal 61, 12 (2015), 4481-4490All rights reservedhttp://www.europeana.eu/rights/rr-f/info:eu-repo/semantics/openAccess