b'Modular designs forNovel facilitated transport membranes enable effective facilitated transportand economical ethylene separation from ethane.membranes in olefinT he purpose of this research was to improve energy and elements to molecules and materials performance by developing, scaling, and production demonstrating membrane modules based on facilitated transport membranes (FTMs). The team determined that polydimethylsiloxane with a non-aqueous room temperature ionic liquid (a solution of silver salt) can provide high permeability (1000-1500 Barrers) and high selectivity ratio of ethylene over ethane ( = 20-80). Several iterations of FTMs were investigated, and we focused on preserving active silver by electrochemistry and utilizing organic solvent PROJECT NUMBER:combinations including room temperature ionic liquids. Several polymers were 21A1050-072FP tested to evaluate sealing and mechanical integrity of the gaskets, spacers, and membranes with the silver ionic liquid. These tests showed that the silver ionic liquid TOTAL APPROVED AMOUNT:is aggressive to most rubbery polymeric materials that were not fluorinated, and it $750,000 over 3 yearsforced our systems to use fluorinated materials for seals. With these materials, a good PRINCIPAL INVESTIGATOR:ethylene permeability of 200 Barrers can be maintained with an ethylene/ethane John Klaehn ratio selectivity of 20. We tested our silver ionic liquid with controlled humidification, and humidity (water) does not impact the silver ionic liquid or its ethylene recovery CO-INVESTIGATORS:with the FTM. Remarkably, these new FTMs remained stable for long durations while Christopher Orme, INL testing the gas permeability (250 hours), and minimal discoloration (reduced Glenn Lipscomb, University of Toledosilver/silver nanoparticles) was observed with the polydimethylsiloxane membrane. A final component in the FTM was identified as a ceramic material to assist in silver ion stability. The discovery of this ceramic material with aqueous silver salts resulted in more consistent ethylene production with long-term stabilized silver ion in the FTM. We stress tested this membrane under several different mixed gas streams, including carbon dioxide, carbon monoxide, nitrogen, argon, methane, and ethane, which is not typically reported in literature. The importance of these other gases is the possible problems with these gasescompetitive binding or loss of facilitationthat could be found in these ethylene feed streams. These other gases were at equal volume percentages compared to ethylene. Under these mixed gas streams, this new FTM was tested at fixed concentrations of ethylene 2, 10 and 50 volume percent, and we periodically changed these concentrations to simulate changes in ethylene production along with keeping the FTM idle (no gas flow). Remarkably, no significant changes in ethylene production were observed in these new FTMs, and the FTMs operated over 30 days while producing an enriched ethylene from mixed gas feed streams. The conclusion of this project showed successful larger new FTM modules were easily fabricated and integrated into an electrochemical nonoxidative deprotonation process feed stream to enrich ethylene. As a result, this research proved these novel FTMs are practical for commercial configurations with point source ethylene generators in integrated energy systems. These FTMs are designed to recover ethylene from these point sources during excess power generation. 78'