Co-production of hydrogen and electricity in a high temperature electrochemical system
First Claim
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1. A method of producing hydrogen, comprising:
- providing a carbon containing fuel and an oxidizer into a high temperature fuel cell;
generating a fuel side exhaust stream from the fuel cell while the fuel and the oxidizer are provided into the fuel cell operating in a fuel cell mode;
separating at least a portion of hydrogen from the fuel side exhaust stream during the fuel cell mode; and
providing at least a portion of the separated hydrogen to a hydrogen storage vessel or to a hydrogen using device.
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Abstract
A high temperature electrochemical system, such as a solid oxide fuel cell system, generates hydrogen and optionally electricity in a fuel cell mode. At least a part of the generated hydrogen is separated and stored or provided to a hydrogen using device. A solid oxide regenerative fuel cell system stores carbon dioxide in a fuel cell mode. The system generates a methane fuel in an electrolysis mode from the stored carbon dioxide and water by using a Sabatier subsystem. Alternatively, the system generates a hydrogen fuel in an electrolysis mode from water alone.
90 Citations
31 Claims
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1. A method of producing hydrogen, comprising:
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providing a carbon containing fuel and an oxidizer into a high temperature fuel cell; generating a fuel side exhaust stream from the fuel cell while the fuel and the oxidizer are provided into the fuel cell operating in a fuel cell mode; separating at least a portion of hydrogen from the fuel side exhaust stream during the fuel cell mode; and providing at least a portion of the separated hydrogen to a hydrogen storage vessel or to a hydrogen using device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of producing hydrogen, comprising:
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providing a carbon containing fuel and an oxidizer into a solid oxide fuel cell; generating electricity and a fuel side exhaust stream from the fuel cell while the fuel and the oxidizer are provided into the fuel cell; separating at least a portion of hydrogen from the fuel side exhaust stream during generation of electricity; and providing at least a portion of the separated hydrogen to a hydrogen storage vessel or to a hydrogen using device. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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Specification