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公开(公告)号：US20190106330A1
公开(公告)日：2019-04-11
申请号：US16093845
申请日：2017-04-13
摘要： A method and device for producing ammonia from a syngas in a heterogeneous gas catalysis process in at least two reaction devices connected in series. Each reaction device includes at least two catalyst beds through which the syngas is conducted and in which an at least partial conversion of the syngas into the product gas is carried out. At least one first heat exchanger is provided in the first reaction device, and the fresh syngas is pre-heated in the first heat exchanger. The syngas exiting the first catalyst bed and which includes the product and non-converted reactants is cooled before entering the second catalyst bed. According to an embodiment of the invention, the pre-heating process is carried out in a first heat exchanger arranged between the first and the second catalyst bed. Thus, synthesis conversion can be increased without substantially increasing the process gas quantity.
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公开(公告)号：US20220241747A1
公开(公告)日：2022-08-04
申请号：US17629604
申请日：2020-07-08
摘要： A method can be utilized to startup into a normal operating state a steam reformer arrangement for the production of hydrogen, methanol, or ammonia. A plurality of burners that are coupled to at least one reactor having reformer tubes may be controlled and regulated. In particular, startup may be performed out and regulated in an automated manner by the burners ensuring normal operation, in particular non-startup burners, being ignited indirectly as a function of temperature by means of burners provided specifically for startup, in particular pilot burners and startup burners, as a function of automatically evaluated flame monitoring at least at the pilot burners. This method provides time savings and savings of outlay in terms of personnel and also high operational reliability.
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公开(公告)号：US20210276863A1
公开(公告)日：2021-09-09
申请号：US17261206
申请日：2019-07-18
发明人： Sebastian SIGGE , Klaus NÖLKER , Steffen JAHN
摘要： An apparatus for producing ammonia or hydrogen may include a) a gas stream feed conduit having a connecting conduit to a steam reformer with a waste heat section; b) a heat exchanger downstream of the gas stream feed conduit; c) a gas stream preheater downstream of the heat exchanger; d) a recirculation conduit which is located downstream of the gas stream preheater and leads to the gas stream feed conduit or, upstream of the heat exchanger, to the connecting conduit; and e) the steam reformer with the waste heat section, where the waste heat section may be in thermal contact with the gas stream preheater and the flow of the gas stream which has been heated in the gas stream preheater through the recirculation conduit can be regulated. A process for producing ammonia or hydrogen may employ such an apparatus.
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公开(公告)号：US20210254774A1
公开(公告)日：2021-08-19
申请号：US17253496
申请日：2019-06-25
发明人： Martin MAI , Klaus NÖLKER , Bernd KEIL , Tarek EL HAWARY
摘要： A reformer for steam reforming a hydrocarbon-containing mixture, including a combustion chamber, a burner arranged within the combustion chamber, a first reactor tube which is arranged at least in sections within the combustion chamber, a catalyst arranged inside the first reactor tube, and an electrically heatable heating element is arranged inside the first reactor tube.
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公开(公告)号：US20220023775A1
公开(公告)日：2022-01-27
申请号：US17277499
申请日：2019-09-13
发明人： Klaus NÖLKER
摘要： A method of removing inert gas dissolved in liquid ammonia involves evaporating, compressing, and then condensing the liquid ammonia together with the inert gas dissolved therein. Thereby, a product stream of warm liquid ammonia that has been freed of the inert gas is obtained, which is under elevated pressure relative to standard pressure and hence suitable for immediate use in methods in which pure liquid pressurized ammonia is required. If, by contrast, the ammonia is cooled first, for example, below the boiling temperature for ammonia and expanded to standard pressure to store it in tanks as liquid ammonia at low temperatures, it is necessary first to reheat and compress it for further processing operations. Thus the disclosed methods lead to significant energy savings.
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公开(公告)号：US20210107801A1
公开(公告)日：2021-04-15
申请号：US17047907
申请日：2019-04-15
发明人： Maximilian SCHAAF , Dirk MEURER , Klaus NÖLKER
IPC分类号： C01C1/04
摘要： An ammonia plant having a first and second reactor and a start-up oven having at least one first heat exchanger. The first reactor operates under a higher internal pressure than the second reactor. The start-up oven is connected via a piping system for at least one synthesis gas to the first and second reactor. Ammonia is produced by heating synthesis gas in the start-up oven and transferring the heated synthesis gas to the first reactor for initiating the chemical reaction. Synthesis gas is heated with the same start-up oven and is transferred to the second reactor for initiating the chemical reaction, wherein high-pressure synthesis of ammonia occurs in the first reactor and low-pressure synthesis of ammonia occurs in the second reactor at a lower process pressure than in the first reactor.
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公开(公告)号：US20200039831A1
公开(公告)日：2020-02-06
申请号：US15735636
申请日：2016-06-09
发明人： Evgeni GORVAL , Reinhard HEUN , Joachim JOHANNING , Klaus NÖLKER
摘要： A process and a device for the production of ammonia at different pressure levels may involve removing gases that are inert (inert gases) or harmful with regard to ammonia synthesis from the process in a process step before the ammonia synthesis so that enrichment of these is decreased or suppressed. For example, with respect to a gas mixture that includes hydrogen, nitrogen, water, methane, carbon monoxide, and carbon dioxide, at least part of the water, at least part of the methane, at least part of the carbon monoxide, and at least part of the carbon dioxide may be removed from the gas mixture before the synthesis of the ammonia occurs.
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公开(公告)号：US20240246830A1
公开(公告)日：2024-07-25
申请号：US18597600
申请日：2024-03-06
发明人： Maximilian SCHAAF , Dirk MEURER , Klaus NÖLKER
IPC分类号： C01C1/04
CPC分类号： C01C1/0452 , C01C1/0482
摘要： A method of producing ammonia includes heating, with a start-up oven, a first synthesis gas for a first ammonia synthesis in a first reactor; transferring the heated first synthesis gas to the first reactor for initiating a chemical reaction; heating, with the start-up oven, a second synthesis gas for a second ammonia synthesis in a second reactor; and transferring the heated second synthesis gas to the second reactor for initiating a chemical reaction, wherein a high-pressure synthesis of ammonia is carried out in the first reactor and a low-pressure synthesis of ammonia is carried out in the second reactor at a process pressure which is lower than the process pressure in the first reactor.
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