Apparatuses and processes for the recovery of carbon dioxide streams

A process for producing a stream comprising carbon dioxide, the process comprising:

• passing a feed stream, at a pressure of at least 25 bar (g), comprising carbon dioxide and one or more additional components comprising hydrogen, nitrogen, carbon monoxide, methane, oxygen, argon, or combinations thereof to a first separation zone configured to separate the feed stream into a carbon dioxide enriched stream and a carbon dioxide depleted stream enriched in said one or more additional components, wherein the first separation zone comprises a cryogenic fractionation column;
• recovering the carbon dioxide enriched stream from the first separation zone;
• passing the carbon dioxide depleted stream to a second separation zone
• configured to separate the carbon dioxide depleted stream into a first stream comprising said one or more additional components and a second stream comprising at least 50% of the carbon dioxide in said carbon dioxide depleted stream;
• recovering the first stream from the second separation zone;
• increasing a pressure of the second stream to provide a high pressure second stream, wherein the pressure is increased using a compressor;
• combining the high pressure second stream with the feed stream;
• and
• passing the high pressure second stream to the first separation zone.

An apparatus for producing a stream comprising carbon dioxide, the apparatus comprising:

• a first separation zone configured to receive a feed stream comprising carbon dioxide and one or more additional components comprising hydrogen, nitrogen, carbon monoxide, methane, oxygen, argon, or combinations thereof and separate the feed stream into a carbon dioxide enriched stream and a carbon dioxide depleted stream enriched in said one or more additional components, wherein the first separation zone comprises a cryogenic fractionation column;
• a second separation zone configured to receive the carbon dioxide depleted stream and separate the carbon dioxide depleted stream into first stream comprising said one or more additional components and a second stream comprising at least 50% of the carbon dioxide in said depleted stream;
• one or more recycle lines configured to pass the second stream to the first separation zone;
• and,
• a compressor, in the one or more recycle lines, configured to increase a pressure of the second stream.