Reforming with carbon capture
AssigneeZoneFlow Reactor Technologies, LLC
InventorJonathan Jay Feinstein
Life of this patent
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Abstract
Steam reforming processes can include treatment of syngas by water gas shift, water separation, and hydrogen separation by pressure swing adsorption (PSA). Additionally, CO2 can be scrubbed from the syngas prior to the PSA. PSA tail gas, including CH4, CO, and H2, can be recompressed and recycled to the PSA for further hydrogen separation and to the steam reformer feed to convert eventually all carbon in the feedstock into CO2 for the scrubber to separate. Fuel requirements can be fulfilled by part of the hydrogen product to eliminate stack CO2 emissions.
Claims10
A method of producing hydrogen, the method comprising:
- reforming a mixture of a steam and a feedstock containing carbon and hydrogen in a reforming unit to produce syngas comprising hydrogen, carbon dioxide, and at least one of methane and carbon monoxide;
- separating the syngas in at least one separation unit into a carbon dioxide rich stream, a hydrogen rich stream, and a tail gas stream containing remaining contents of the syngas;
- and
- reforming the tail gas stream to produce additional hydrogen.
Dependencies are inferred from the claim text.