(715c) Rational Formulation Design of Multicomponent Membranes for Carbon Dioxide Separation

Elsaidi, S. - Presenter, DOE National Energy and Technology Laboratory (NETL)
Hopkinson, D., National Energy Technology Laboratory
Venna, S., Leidos Research Support Team
Sekizkardes, A., National Energy Technology Laboratory
Steckel, J. A., National Energy Technology Laboratory
Mohamed, M., University of Pittsburgh
Baker, J. S., National Energy Technology Laboratory
Baltrus, J. P., National Energy Technology Laboratory
The discovery of a membrane that can effectively remove carbon dioxide from coal-burning power plant emissions would help lower carbon dioxide emissions worldwide. To make membrane-based carbon capture economically viable, new formulations must be identified with high selectivity and high CO2 permeance. We demonstrated herein the ability to break the permeability/selectivity trade-off by using multicomponent mixed-matrix membranes (McMMMs) with two, three or four components wherein each constituent has a specific function and have been designed for compatibility and high gas separation performance. The chemical interaction between the metal-organic framework (MOF) nanoparticles and the polymers is the key factor for optimizing the MOF-polymer interfacial compatibility. Compared with the neat polymer material, the CO2 permeability and CO2/N2 selectivity were significantly enhanced, while the predicted cost of carbon capture was reduced. The permeability/selectivity values surpass the Robeson upper bound and suggest the potential of these membranes for practical CO2 separations.