Method for treating hydrogen-containing and oxygen-containing residual gases of fuel cells, and residual gas treatment system
AssigneeSiemens Energy Global GmbH & Co. KG
InventorsTorsten Brandt, Markus Hertweck, Günter Putschky, Daniel Christian Sander, Stefan Siedler, Fabian Straub
Life of this patent
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Abstract
A method for treating hydrogen-containing and oxygen-containing residual gases of fuel cells, wherein the residual gases are fed to a gas circuit, and a residual gas mixture resulting therefrom is circulated in the gas circuit by a device for converting hydrogen and oxygen to water. In order to reduce the amount of hydrogen and oxygen in the residual gas mixture, at least part of the residual gas mixture is discharged from the gas circuit.
Claims14
A process for treating hydrogen-containing and oxygen-containing residual gases from fuel cells, comprising:
- feeding the hydrogen-containing and oxygen-containing residual gases to a gas circuit and circulating a resulting residual gas mixture in the gas circuit through a device for converting hydrogen and oxygen into water in order to reduce an amount of hydrogen and oxygen in the residual gas mixture,
- discharging at least a portion of the residual gas mixture from the gas circuit and feeding the at least a portion of the residual gas mixture to a gas reservoir or introducing the at least a portion of the residual gas mixture into ambient air,
- wherein the at least a portion of the residual gas mixture is discharged from the gas circuit and fed to the gas reservoir when a predefined pressure of the residual gas mixture in the gas circuit is exceeded.
A residual gas treatment system for hydrogen-containing and oxygen-containing residual gases from fuel cells, comprising:
- a gas circuit for a circulation mode of a residual gas mixture comprising the hydrogen-containing and oxygen-containing residual gases,
- a device for converting hydrogen and oxygen into water, the device being arranged in the gas circuit in order to reduce an amount of hydrogen and oxygen in the residual gas mixture,
- wherein at least a portion of the residual gas mixture is dischargeable from the gas circuit,
- a pressure sensor which is arranged in the gas circuit and detects a pressure of the residual gas mixture in the gas circuit, and
- a control device which is programmed to control discharging of the at least a portion of the residual gas mixture from the gas circuit depending on a detected pressure of the residual gas mixture in the gas circuit,
- wherein the at least a portion of the residual gas mixture from the gas circuit is discharged when a predefined pressure of the residual gas mixture in the gas circuit is exceeded.
A residual gas treatment system for hydrogen-containing and oxygen-containing residual gases from fuel cells, comprising:
- a gas circuit for a recirculation mode of a residual gas mixture comprising the hydrogen-containing and oxygen-containing residual gases,
- a device for converting hydrogen and oxygen into water, the device being arranged in the gas circuit in order to reduce an amount of hydrogen and oxygen in the residual gas mixture,
- wherein at least a portion of the residual gas mixture is dischargeable from the gas circuit,
- a pressure sensor which is arranged in the gas circuit and detects a pressure of the residual gas mixture in the gas circuit, and
- a control device configured to control discharging of the at least a portion of the residual gas mixture from the gas circuit depending on a detected pressure of the residual gas mixture in the gas circuit,
- wherein the at least a portion of the residual gas mixture from the gas circuit is discharged when a predefined pressure of the residual gas mixture in the gas circuit is exceeded.
Dependencies are inferred from the claim text.