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US 2024/0255220 A1Published application
Method and plant for producing ammonia
AssigneeLinde Aktiengesellschaft
InventorTobias LAUTENSCHLAGER
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AssigneeLinde Aktiengesellschaft
InventorTobias LAUTENSCHLAGER
Estimating the term…
A method for producing ammonia by catalytically reacting hydrogen provided in a first feed stream and nitrogen provided in a second feed stream is proposed, the hydrogen in the first feed stream being at least in part formed by water electrolysis and the nitrogen in the second feed stream being at least in part formed by cryogenic air separation, wherein said cryogenic air separation is performed using an air separation unit comprising a rectification column system, a recycle stream being formed in the air separation unit from a gas stream at least predominantly comprising nitrogen which is withdrawn from the rectification column system, the recycle stream being, in the order indicated, compressed, cooled, expanded and reintroduced into the rectification column system, and wherein waste heat from said catalytically reacting hydrogen and nitrogen is transferred to a steam system providing steam.
A method for producing ammonia by catalytically reacting hydrogen provided in a first feed stream and nitrogen provided in a second feed stream, the hydrogen in the first feed stream being at least in part formed by water electrolysis and the nitrogen in the second feed stream being at least in part formed by cryogenic air separation, wherein said cryogenic air separation is performed using an air separation unit comprising a rectification column system, a recycle stream being at least temporarily formed in the air separation unit from a gas stream at least predominantly comprising nitrogen which is withdrawn from the rectification column system, the recycle stream being at least temporarily, in the order indicated, compressed, cooled, expanded and reintroduced into the rectification column system, and wherein waste heat from said reacting hydrogen and nitrogen is transferred to a steam system providing steam, characterized in that said cooling the recycle stream comprises transferring heat from the recycle stream to the steam system.
A plant for producing ammonia by catalytically reacting hydrogen provided in a first feed stream and nitrogen provided in a second feed stream in a reactor unit, wherein an electrolysis unit is provided which is adapted to form at least a part of the hydrogen in the first feed stream and wherein a cryogenic air separation unit is provided which is adapted to provide at least a part of the nitrogen in the second feed stream, wherein said air separation unit comprises a rectification column system and is adapted to form a recycle stream from a gas stream at least predominantly comprising nitrogen which is withdrawn from the rectification column system, and where recycle stream treatment means are provided which are adapted, in the order indicated, to compress, to cool, to expand and to reintroduce the recycle stream into the rectification column system, and wherein a steam system is provided which is adapted to provide steam from waste heat from said catalytically reacting hydrogen and nitrogen transferred thereto, characterized in that said recycle stream treatment means are adapted to perform said cooling of the recycle stream at least in part by transferring heat from the recycle stream to the steam system.
Dependencies are inferred from the claim text.