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US 11,814,287 B2Granted
Method of producing a hydrogen-enriched product and recovering CO2 in a hydrogen production process unit
AssigneeUop LLC
InventorsAddison Cruz, Bradley Russell, Erick J. Bennett, III, Kurt Kraus, Stefano Bietto, William Cady, Kyle Cuellar, Oluwaseyi Kayode
Life of this patent
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Abstract
A process and apparatus for producing a hydrogen-enriched product and recovering CO2 from an effluent stream from a hydrogen production process unit are described. The process utilizes a CO2 recovery system integrated with a PSA system that produces at least two product streams to recover additional hydrogen and CO2 from the tail gas stream of a hydrogen PSA unit in the hydrogen production process.
Claims20
A method of producing a hydrogen-enriched product and recovering CO2 comprising:
- processing a feed stream comprising hydrocarbons or a carbonaceous feedstock in a hydrogen production process unit to produce a synthesis gas mixture comprising hydrogen, carbon dioxide, water, and at least one of methane, carbon monoxide, nitrogen, and argon;
- separating an effluent stream comprising the synthesis gas from the hydrogen production process unit in a hydrogen pressure swing adsorption (PSA) unit into a first hydrogen stream enriched in hydrogen and a hydrogen depleted tail gas stream comprising a portion of the hydrogen, the carbon dioxide, the water, and the at least one of the methane, the carbon monoxide, the nitrogen, and the argon;
- compressing the hydrogen depleted tail gas stream in a compressor to form a compressed tail gas stream;
- separating the compressed tail gas stream in a CO2 recovery system into a CO2-enriched product stream and an overhead stream comprising the portion of the hydrogen, a portion of the carbon dioxide, and the at least one of the methane, the carbon monoxide, the nitrogen, and the argon;
- separating the overhead stream from the CO2 recovery system in a PSA system that produces at least two product streams into at least a second hydrogen stream enriched in hydrogen, and a CO2 stream enriched in carbon dioxide;
- recovering the second hydrogen stream;
- and
- optionally recycling the CO2 stream to the compressor.
5 more elements
A method of producing a hydrogen-enriched product and recovering CO2 comprising:
- processing a feed stream comprising hydrocarbons or a carbonaceous feedstock in a hydrogen production process unit to produce a synthesis gas mixture comprising hydrogen, carbon dioxide, water, and at least one of methane, carbon monoxide, nitrogen, and argon;
- separating an effluent stream comprising the synthesis gas mixture from the hydrogen production process unit in a hydrogen pressure swing adsorption (PSA) unit into a first hydrogen stream enriched in hydrogen and a hydrogen depleted tail gas stream comprising a portion of the hydrogen, the carbon dioxide, the water, and the at least one of the methane, the carbon monoxide, the nitrogen, and the argon;
- compressing the hydrogen depleted tail gas stream in a compressor to form a compressed tail gas stream;
- drying the compressed tail gas stream in a dryer to remove the water;
- cooling the dried tail gas stream in a chiller to a temperature of about −20° C. to about −50° C. to form a chilled tail gas stream;
- separating the chilled tail gas stream in a CO2 recovery system into a CO2-enriched product stream and an overhead stream comprising the portion of the hydrogen, a portion of the carbon dioxide, and the at least one of the methane, the carbon monoxide, the nitrogen, and the argon;
- separating the overhead stream from the CO2 recovery system in a PSA system that produces at least two product streams into at least a second hydrogen stream enriched in hydrogen, and a CO2 stream enriched in carbon dioxide;
- recovering the second hydrogen stream;
- and
- recycling the CO2 stream to the compressor.
7 more elements
An apparatus for producing a hydrogen-enriched product and recovering CO2 comprising:
- a hydrogen production process unit having at least one inlet and at least one outlet;
- a hydrogen PSA unit having an inlet, a hydrogen outlet, and a tail gas outlet, the hydrogen PSA unit inlet in fluid communication with the hydrogen production process unit outlet;
- a compressor having an inlet and an outlet, the compressor inlet in fluid communication with the hydrogen PSA tail gas outlet;
- a dryer having an inlet and at least one outlet, the dryer inlet in fluid communication with the compressor outlet;
- a chiller having a gas inlet, a gas outlet, a chilling fluid inlet and a chilling fluid outlet, the chiller gas inlet in fluid communication with the dryer outlet, the chiller fluid inlet in fluid communication with a source of chilling fluid;
- a CO2 recovery system having an inlet, a first outlet, and an overhead outlet, the CO2 recovery system inlet in fluid communication with the chiller gas outlet;
- and
- a PSA system having at least an inlet, a hydrogen outlet, and a CO2 outlet, the PSA system inlet in fluid communication with the CO2 recovery system overhead outlet, and the CO2 outlet in fluid communication with the compressor inlet.
5 more elements
Dependencies are inferred from the claim text.