Patent ID: 11925894
Assignee: AIR PRODUCTS AND CHEMICALS, INC.
Field: Chemical engineering (Chemistry)
Classification: CPC B  F  Y | IPC B  F

Claim 0:
1. A carbon dioxide capture system comprising:
a first heat exchanger configured to exchange heat between an exhaust stream and a lean carbon dioxide effluent stream;
at least one turboexpander comprising:
a compressor coupled in flow communication with the first heat exchanger and configured to form a compressed exhaust stream;
a second heat exchanger, wherein the second heat exchanger receives the compressed exhaust gas stream from the compressor;
a turbine coupled in flow communication with the first heat exchanger, the compressor driven by the turbine, and wherein the turbine is configured to expand the lean carbon dioxide effluent stream;
a carbon dioxide membrane unit coupled in flow communication with the compressor, wherein the carbon dioxide membrane unit is configured to separate the exhaust stream into the lean carbon dioxide effluent stream and a rich carbon dioxide effluent stream, wherein the carbon dioxide membrane unit is further configured to channel the lean carbon dioxide effluent stream to the first heat exchanger; and wherein the carbon dioxide membrane unit further comprises a catalyst portion for reacting carbon monoxide in the exhaust to produce carbon dioxide; and
a cryogenic separation unit coupled in flow communication with the carbon dioxide membrane unit, wherein the cryogenic separation unit is configured to separate the rich carbon dioxide effluent stream into a carbon dioxide product stream and a recycle stream.