| 摘要 |
Process and apparatuses for purifying a feed stream containing CO2 and predominantly hydrogen are provided. In an embodiment, the process includes passing the feed stream through a multilayer adsorbent bed comprising a first adsorbent section, second adsorbent section downstream from the first adsorbent section and a third adsorbent section downstream from the second adsorbent section. The first adsorbent section comprises an activated carbon layer, the second adsorbent section comprises a layer of molecular sieve of the faujasite structure type with a Si/A1 atomic ratio of from 1.5 to 8.0 and the third adsorbent section comprises a layer of molecular sieve of the faujasite structure type with a Si/A1 atomic ratio of from 1,0 to 1.5. At least one of N2, CO2, CH4 and CO is adsorbed from the feed stream and a purified hydrogen product is recovered from the multilayer adsorbent bed. |
