| abstract |
Provided herein are CO 2 -selective membranes that can be used to efficiently separate CO 2 and CO. The membranes can be used to produce high-purity CO 2 and CO gas streams from a feed gas stream comprising a mixture of CO 2 and CO (e.g., an exhaust gas stream from a fuel cell, such as a solid oxide fuel cell). In this way, the membranes can be used with a solid oxide fuel cell system to covert CO 2 to CO. |