Producing ammonia synthesis gas, comprises reacting cracking gas at specific temperature and pressure in a hydrogen, carbon monoxide and carbon dioxide, removing e.g. carbon dioxide and argon from raw synthesis gas and condensing

摘要

Producing ammonia synthesis gas, comprises reacting cracking gas at 25-50[deg] C and at a pressure of 35-70 bar in a hydrogen, carbon monoxide and carbon dioxide as well as relatively low methane and argon containing raw synthesis gas with hydrogen/carbon monoxide volume ratio of 1-5, removing carbon dioxide, carbon monoxide, methane and argon from the raw synthesis gas, and condensing the ammonia-synthesis gas, which is produced by addition of nitrogen, before the feeding into the ammonia synthesis at a pressure of 150-200 bar under simultaneous increase of the temperature to 300-500[deg] C. Process for the production of ammonia synthesis gas from hydrocarbon containing additives by catalytic steam reforming in the presence of water vapor or by non-catalytic partial oxidation with oxygen in the presence of water vapor or by autothermal reforming with oxygen containing gas of a catalyst obtained cracking gas, comprises reacting the cracking gas at 25-50[deg] C and at pressure of 35-70 bar in a hydrogen, carbon monoxide and carbon dioxide as well as relatively low methane and argon containing raw synthesis gas with hydrogen/carbon monoxide volume ratio of 1-5, absorptively removing carbon dioxide, carbon monoxide, methane and argon from the raw synthesis gas, and condensing the ammonia-synthesis gas, which is produced by addition of nitrogen, before the feeding into the ammonia synthesis at a pressure of 150-200 bar under simultaneous increase of the temperature to 300-500[deg] C, where the pressure of 30-50 bar possessing raw synthesis gas is pre-condensed before the absorptive removal of carbon dioxide, carbon monoxide, methane and argon at a pressure of 70-100 bar and then carbon dioxide, carbon monoxide, methane and argon are physisorptively removed from the raw synthesis gas. An independent claim is included for a device for the production of ammonia synthesis gas, comprising a two housing radial wave compressor arranged between the conversion step and the ammonia synthesis plant (11), with 4-7 condensation steps in the first housing and 7-9 compression steps in the second housing and a physisorptively carried out absorption plant (6) situated between the housings (8), for removing the carbon dioxide, carbon monoxide, methane and argon from the raw synthesis gas.