초록 ▼

The present invention is directed to a process for simultaneously obtaining pure carbon monoxide and pure hydrogen in a steam reformer plant for hydrogen or ammonia generation, having a primary reformer, a secondary reformer and downstream thereof, a CO conversion stage. A part gas stream of the syn

The present invention is directed to a process for simultaneously obtaining pure carbon monoxide and pure hydrogen in a steam reformer plant for hydrogen or ammonia generation, having a primary reformer, a secondary reformer and downstream thereof, a CO conversion stage. A part gas stream of the synthesis gas stream, which is discharged from the secondary reformer having a CO content of between 2 and 20 mol. % and is at a temperature of from 200 to 500.degree. C. and a pressure between 15 and 50 bar, is removed between the secondary reformer and the CO conversion stage. The part gas stream is then is cooled to a temperature below 100.degree. C., thereby condensing out the major part of the steam contained in the gas stream. The remaining raw synthesis gas stream is then guided by way of a multistage gas separation plant in which the gas components H.sub.2, residual steam, CH.sub.4, CO.sub.2 and optionally N.sub.2 are separated, either individually or together, from the CO. The separated gas components are then compressed to a pressure which exceeds the pressure in the CO conversion stage and are recombined to form a mixed gas stream. The mixed gas stream is then guided into the CO conversion stage of the steam reformer after being heated to a temperature of from 200 to 500.degree. C. The remaining pure CO fraction isremoved in separate manner and may optionally, be supplied for further processing.

대표청구항 ▼

[ What is claimed is:] [1.] A process for simultaneously obtaining pure carbon monoxide and pure hydrogen by the further process of a synthesis gas stream comprising the gas components H.sub.2, H.sub.2 O vapor, CH.sub.4, CO.sub.2, CO and optionally N.sub.2, comprising the following steps:a) in a ste

[ What is claimed is:] [1.] A process for simultaneously obtaining pure carbon monoxide and pure hydrogen by the further process of a synthesis gas stream comprising the gas components H.sub.2, H.sub.2 O vapor, CH.sub.4, CO.sub.2, CO and optionally N.sub.2, comprising the following steps:a) in a steam reformer plant for hydrogen or ammonia generation, having a primary reformer, a secondary reformer and downstream thereof, a CO conversion stage, removing between the secondary reformer and the CO conversion stage, a part gas stream of said synthesis gas stream discharged from the secondary reformer, which has a CO content of between 2 and 20 mol. % and is at a temperature of from 200 to 500.degree. C. and a pressure within a range of 15 to 50 bar;b) cooling said part gas stream to a temperature below 100.degree. C., thereby condensing out the major part of steam contained in said part gas stream resulting in a raw synthesis gas stream;c) guiding said remaining raw synthesis gas by way of a multistage gas separation plant in which said gas components H.sub.2, residual H.sub.2 O, CH.sub.4, CO.sub.2, CO and optionally N.sub.2 are separated, either individually or together, from the CO;d) compressing the gas components H.sub.2, CH.sub.4 and optionally N.sub.2 from the CO, which are separated from the CO, by compressing said gas components to a pressure which exceeds the pressure in said CO conversion stage and are recombined to form a mixed gas stream;e) heating said mixed gas stream to a temperature from 200 to 500.degree. C. and supplying said mixed gas stream to said CO conversion stage of said steam reformer plant; andf) removing remaining pure CO fraction in a separate manner and optionally, supplying said remaining pure CO fraction to further processing.