Carbon Dioxide Separation with a Two-Dimensional Polymer Membrane
J Schrier, ACS APPLIED MATERIALS & INTERFACES, 4, 3745-3752 (2012).
Carbon dioxide gas separation is important for many environmental and energy applications. Molecular dynamics simulations are used to characterize a two-dimensional hydrocarbon polymer, PG-ES1, that uses a combination of surface adsorption and narrow pores to separate carbon dioxide from nitrogen, oxygen, and methane gases. The CO2 permeance is 3 x 10(5) gas permeation units (GPU). The CO2/N-2 selectivity is 60, and the CO2/CH4 selectivity exceeds 500. The combination of high CO2 permeance and selectivity surpasses all known materials, enabling low- cost postcombustion CO2 capture; utilization of landfill gas, and horticulture applications.
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