Abstract
The present study reports on a new type of low-cost and easy-to-fabricate mixed e- and CO3 2- conducting membrane for advanced high-flux and selective electrochemical CO2 separation from flue gas. The membrane is consisted of a CO3 2--conducting molten carbonate phase and an e--conducting lithiated NiO interphase formed in situ during operation. The testing results explicitly show that the membrane exhibits a CO2 flux density >0.9 mL min-1 cm-2 at 850 oC with a CO2/O2 selectivity of 250-430 and excellent stability for ~450 hours. This level of performance promises the new membrane to be a very competitive technology for future advanced CO2 capture from flue gas.
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