Carbon dioxide recirculating apparatus
View Patent ↗Carbon dioxide recirculating apparatus ( 20, 120 ) is disclosed for use in an arrangement having combination means ( 115 ) and a path for the flow of a gas through the combustion means ( 115 ). The apparatus ( 20, 120 ) comprises extraction means ( 221 ) for extracting carbon dioxide from a first region of the path downstream of the combustion means ( 115 ). It further includes condensing means ( 26, 30 ) for condensing the extracted carbon dioxide, and feed means ( 36, 136 ) for feeding the condensed carbon dioxide to a second region of the path upstream of the combustion means.
1. Carbon dioxide recirculating apparatus for a fuel cell arrangement, the fuel cell arrangement comprising:
a cathode;
an anode; and
a path for a flow of gas through the anode, the carbon dioxide recirculating apparatus comprising:
extraction means for extracting carbon dioxide from a first region of the path downstream of the anode;
condensing means for condensing the extracted carbon dioxide; and
feed means for feeding the condensed carbon dioxide to the cathode.
2. A carbon dioxide recirculating apparatus for a fuel cell arrangement comprising:
a cathode;
an anode; and
a path for a flow of gas through the anode, the carbon dioxide recirculating apparatus comprising:
extraction means for extracting carbon dioxide from a first region of the path downstream of the anode;
a compressor constructed for receiving the extracted carbon dioxide and condensing the extracted carbon dioxide; and
feed means for feeding the condensed carbon dioxide to the cathode.
3. A carbon dioxide recirculating apparatus for a fuel cell arrangement according to claim 2 , wherein the apparatus further comprises a turbine driven by gases exhausted from said cathode, the turbine being arranged to drive the compressor.
4. A carbon dioxide recirculating apparatus for a fuel cell arrangement according to claim 3 , wherein the turbine comprises a free power turbine driven by gases exhausted from a principal turbine.
5. A carbon dioxide recirculating apparatus for a fuel cell arrangement according to claim 4 , wherein the principal turbine is driven by gases exhausted from the cathode, and the arrangement further includes a principal compressor driven by the principal turbine, the principal compressor receiving recirculated carbon dioxide and compressing gases prior to said gases being passed to the cathode.