Patent ID: 7648566

Claim:
An apparatus for removing carbon dioxide from a fluid stream, comprising: a housing having an inlet near an upstream end and an outlet near a downstream end; a first conversion-removal portion located in the housing, near the inlet, and configured to receive a fluid stream from the inlet, wherein the first conversion-removal portion comprises a first catalyst section configured to convert CO in the stream to CO 2 ; and a first membrane section located downstream of and in flow communication with the first catalyst section, wherein the first membrane section is configured to selectively remove the CO 2 from the stream and to be in flow communication with a first sweep gas; and a second conversion-removal portion located in the housing and downstream of the first conversion-removal portion, the second conversion-removal portion being configured to receive the stream from the first conversion-removal portion, wherein the second conversion-removal portion comprises a second catalyst section configured to convert CO in the stream to CO 2 ; and a second membrane section located downstream of and in flow communication with the second catalyst section, wherein the second membrane section is configured to selectively remove the CO 2 from the stream and to be in flow communication with a second sweep gas.