Carbon Molecular Sieve Membranes Comprising Graphene Oxides and Porous Carbon for CO2/N2 Separation

To improve the CO2/N2 separation performance, mixed-matrix carbon molecular sieve membranes (mixed-matrix CMSMs) were fabricated and tested. Two carbon-based fillers, graphene oxide (GO) activated (YP-50F), separately incorporated into two polymer precursors (Matrimid® 5218 ODPA-TMPDA), resulting CMSMs demonstrated improved CO2 permeability. The improvement afforded by YP-50F was more substantial due to its higher accessible surface area. Based on gas permeation data Robeson plot for separation, performances of containing 15 wt % GO in mixed matrix surpassed 2008 upper bound polymeric membranes. Hence, this study demonstrates feasibility such improving performance through appropriate choice filler materials matrices.