HIGH-EFFICIENCY FUEL CELL SYSTEM WITH CARBON DIOXIDE CAPTURE ASSEMBLY AND METHOD

摘要

A high efficiency fuel cell system includes a topping fuel cell assembly that includes a topping cathode portion and a topping anode portion, as well as a bottoming fuel cell assembly that includes a bottoming cathode portion and a bottoming anode portion. The assembly also includes a flue gas generating device configured to provide flue gas to the topping cathode portion and/or the bottoming cathode portion, and an oxidizer assembly configured to (i) oxidize anode exhaust output from the bottoming anode portion with air and/or oxygen to generate carbon dioxide-containing exhaust and (ii) generate waste heat for heating the flue gas before the flue gas is provided to the topping cathode portion and/or the bottoming cathode portion. A separation assembly is configured to receive the carbon dioxide-containing exhaust from the oxidizer assembly and to separate carbon dioxide from the carbon dioxide-containing exhaust.

主权项

1. A high efficiency fuel cell system comprising:
a topping fuel cell assembly comprising a topping cathode portion and a topping anode portion; a bottoming fuel cell assembly comprising a bottoming cathode portion and a bottoming anode portion, wherein the bottoming anode portion receives anode exhaust output from the topping anode portion; a flue gas generating device configured to provide flue gas to at least one of the topping cathode portion or the bottoming cathode portion; an oxidizer assembly configured to (i) oxidize anode exhaust output from the bottoming anode portion with air and/or oxygen to generate carbon dioxide-containing exhaust and (ii) generate waste heat for heating the flue gas before the flue gas is provided to the topping cathode portion and/or the bottoming cathode portion; and a separation assembly configured to receive the carbon dioxide-containing exhaust from the oxidizer assembly and to separate carbon dioxide from the carbon dioxide-containing exhaust.