Solid oxide regenerative fuel cell with selective anode tail gas circulation
First Claim
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1. A solid oxide fuel cell system, comprising:
- a solid oxide fuel cell stack;
a fuel supply inlet conduit adapted to provide a hydrocarbon fuel inlet stream toward the solid oxide fuel cell stack;
a fuel exhaust outlet conduit adapted to remove a fuel exhaust stream from the solid oxide fuel cell stack;
a water vapor and enthalpy recovery unit either directly connected or indirectly connected via a water supply conduit to the fuel supply inlet conduit and to the fuel exhaust outlet conduit, wherein the water vapor and enthalpy recovery unit is adapted to selectively transfer at least a portion of water vapor and heat from the fuel exhaust stream to the hydrocarbon fuel inlet stream; and
a hydrogen recovery unit connected to the fuel supply inlet conduit and to the fuel exhaust outlet conduit, wherein the hydrogen recovery unit is adapted to selectively transfer at least a portion of hydrogen from the fuel exhaust stream to the hydrocarbon fuel inlet stream.
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Abstract
A solid oxide fuel cell system includes a solid oxide fuel cell stack and a hydrogen recovery unit connected to a fuel supply inlet conduit and to a fuel exhaust outlet conduit. The hydrogen recovery unit is adapted to selectively transfer at least a portion of hydrogen from the fuel exhaust stream to the hydrocarbon fuel inlet stream.
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Citations
27 Claims
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1. A solid oxide fuel cell system, comprising:
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a solid oxide fuel cell stack;
a fuel supply inlet conduit adapted to provide a hydrocarbon fuel inlet stream toward the solid oxide fuel cell stack;
a fuel exhaust outlet conduit adapted to remove a fuel exhaust stream from the solid oxide fuel cell stack;
a water vapor and enthalpy recovery unit either directly connected or indirectly connected via a water supply conduit to the fuel supply inlet conduit and to the fuel exhaust outlet conduit, wherein the water vapor and enthalpy recovery unit is adapted to selectively transfer at least a portion of water vapor and heat from the fuel exhaust stream to the hydrocarbon fuel inlet stream; and
a hydrogen recovery unit connected to the fuel supply inlet conduit and to the fuel exhaust outlet conduit, wherein the hydrogen recovery unit is adapted to selectively transfer at least a portion of hydrogen from the fuel exhaust stream to the hydrocarbon fuel inlet stream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A solid oxide fuel cell system, comprising:
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a solid oxide fuel cell stack;
a fuel supply inlet conduit adapted to provide a hydrocarbon fuel inlet stream toward the solid oxide fuel cell stack;
a fuel exhaust outlet conduit adapted to remove a fuel exhaust stream from the solid oxide fuel cell stack;
a water vapor unit either directly connected or indirectly connected via a water supply conduit to the fuel supply inlet conduit, wherein the water vapor unit is adapted to selectively provide water vapor to the hydrocarbon fuel inlet stream; and
a hydrogen recovery unit connected to the fuel exhaust outlet conduit, wherein the hydrogen recovery unit is adapted to recover hydrogen from the fuel exhaust stream. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A solid oxide fuel cell system, comprising:
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a solid oxide fuel cell stack;
a first means for providing a hydrocarbon fuel inlet stream toward the solid oxide fuel cell stack;
a second means for removing a fuel exhaust stream from the solid oxide fuel cell stack;
a third means for selectively providing water vapor to the hydrocarbon fuel inlet stream; and
a fourth means for recovering hydrogen from the fuel exhaust stream. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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Specification