Method to condense and recover carbon dioxide from fuel cells

Details Method to condense and recover carbon dioxide from fuel cells Method to condense and recover carbon dioxide from fuel cells

F - Mech Eng,Light,Heat,Weapons

28

D

F28D 7/00 (2006.01) F28B 1/06 (2006.01) F28D 7/08 (2006.01) H01M 8/04 (2006.01)

Patent

CA 2569006

A method to condense and recover carbon dioxide. A first step involve providing at more than one heat exchanger, with each heat exchanger having a first flow path for passage of a first fluid and a second flow path for passage of a second fluid. A second step involves passing a stream of very cold natural gas sequentially along the first flow path of each heat exchanger until it is heated for distribution and concurrently passing a gaseous stream rich in carbon dioxide sequentially along the second flow path of each heat exchanger, allowing a gaseous portion of the gaseous stream rich in carbon dioxide to pass to a next sequential heat exchanger and capturing in a collection vessel the condensed carbon dioxide. This processes results in a cryogenic heat exchange in which natural gas at Metering and Pressure Reduction Stations is first cooled by reducing its pressure through a gas expander or a pressure reducing valve and then heated in a series of stages and the gaseous stream rich in carbon dioxide stream is separated in a series of stages through sequential cryogenic carbon dioxide separation and recovery.

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