Fuel cell anode exhaust fuel recovery by adsorption
First Claim
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1. A method of operating a fuel cell system, comprising:
- providing a fuel inlet stream into a fuel cell stack;
operating the fuel cell stack to generate electricity and a hydrogen containing fuel exhaust stream;
separating at least a portion of hydrogen contained in the fuel exhaust stream using partial pressure swing adsorption; and
providing the hydrogen separated from the fuel exhaust stream into the fuel inlet stream.
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Abstract
A method of operating a fuel cell system includes providing a fuel inlet stream into a fuel cell stack, operating the fuel cell stack to generate electricity and a hydrogen containing fuel exhaust stream, separating at least a portion of hydrogen contained in the fuel exhaust stream using partial pressure swing adsorption, and providing the hydrogen separated from the fuel exhaust stream into the fuel inlet stream.
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Citations
23 Claims
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1. A method of operating a fuel cell system, comprising:
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providing a fuel inlet stream into a fuel cell stack;
operating the fuel cell stack to generate electricity and a hydrogen containing fuel exhaust stream;
separating at least a portion of hydrogen contained in the fuel exhaust stream using partial pressure swing adsorption; and
providing the hydrogen separated from the fuel exhaust stream into the fuel inlet stream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A fuel cell system, comprising:
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a fuel cell stack;
a partial pressure swing adsorption unit comprising a plurality of adsorbent beds;
a first conduit which operatively connects a fuel exhaust outlet of the fuel cell stack to a first inlet of the partial pressure swing adsorption unit;
a second conduit which operatively connects a purge gas source to a second inlet of the partial pressure swing adsorption unit; and
a third conduit which operatively connects an outlet of the partial pressure swing adsorption unit to a fuel inlet of the fuel cell stack. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A fuel cell system, comprising:
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a fuel cell stack; and
a separation means for separating at least a portion of hydrogen contained in a fuel cell stack fuel exhaust stream using partial pressure swing adsorption and for providing the hydrogen separated from the fuel exhaust stream into a fuel cell stack fuel inlet stream. - View Dependent Claims (21, 22)
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23. A method of operating a fuel cell system, comprising:
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providing a fuel inlet stream into a fuel cell stack;
operating the fuel cell stack to generate electricity and a hydrogen containing fuel exhaust stream;
separating at least a portion of hydrogen contained in the fuel exhaust stream using temperature swing adsorption; and
providing the hydrogen separated from the fuel exhaust stream into the fuel inlet stream.
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Specification