Simulated moving bed system for CO2 separation, and method of same

A method for carbon dioxide (CO2) separation, the method comprising:

• feeding a first CO2 feed stream into a first sorbent bed at a first pressure and a first temperature;
• collecting a first CO2-depleted stream from the first sorbent bed approximately at the first pressure and the first temperature;
• feeding a steam stream into a second sorbent bed approximately at the first pressure and the first temperature;
• collecting a first CO2-enriched stream from the second sorbent bed approximately at the first pressure and the first temperature;
• and
• switching one or more streams between the first sorbent bed and the second sorbent bed by:
• feeding the first CO2 feed stream into the second sorbent bed at the first pressure and the first temperature;
• collecting a second CO2-depleted stream from the second sorbent bed approximately at the first pressure and the first temperature;
• feeding the steam stream into the first sorbent bed approximately at the first pressure and the first temperature;
• and
• collecting a second CO2-enriched stream from the first sorbent bed approximately at the first pressure and the first temperature,
• wherein the first and second sorbent beds each comprise an alkalized sorbent comprising a substrate and at least one alkali or alkaline earth component in an amount of at least about 10 weight percent of the alkalized sorbent.

A method comprising:

• feeding a first CO2 feed stream into one or more first sorbent beds;
• collecting a CO2-depleted stream from the one or more first sorbent beds;
• feeding a steam stream into the one or more first sorbent beds;
• collecting a CO2-enriched stream from the one or more first sorbent beds;
• fluidly interconnecting one or more second sorbent beds with the first CO2 feed stream, the steam stream, the CO2-depleted stream, the CO2-enriched stream, and a purge stream;
• operating the one or more first and second sorbent beds in a first configuration by feeding the purge stream into the one or more second sorbent beds;
• and
• operating the one or more first and second sorbent beds in a second configuration by feeding the purge stream into the one or more first sorbent beds,
• wherein the one or more first and second sorbent beds are maintained at substantially constant pressure and/or temperature and each comprise an alkalized sorbent comprising a substrate and at least one alkali or alkaline earth component in an amount of at least about 10 weight percent of the alkalized sorbent.