INTEGRATED METHOD AND INSTALLATION FOR CRYOGENIC ADSORPTION AND SEPARATION FOR PRODUCING CO2

摘要

The invention concerns integrated method and installation using an adsorption unit (3) and a cryogenic unit (9), wherein a feeding gas containing CO₂ is conveyed to an adsorption unit (3) where it is separated into a first flow enriched in CO₂ (6) and a first flow depleted in CO₂ (5), the first flow enriched in CO₂ being conveyed to the cryogenic unit (9) where it is separated into a second flow rich in CO₂ (11) and a second flow depleted in CO₂ (10). The first flow enriched in CO₂ (6) derived from the adsorption unit (3) is sent to homogenizing means (17), such as a storage volume or the like, for attenuating the cyclic variations of flow rate, of composition and/or of gas pressure, then subjected to at least one intermediate compression step (7) prior to its input into the cryogenic unit (9). The first flow enriched in CO₂ (6) exiting the adsorption unit (3) contains between 40 and 95 %, preferably between 60 and 85 % of CO₂.