Compositions for carbon dioxide separation using steam regeneration, and method for preparing same

A method comprising:

• receiving a first gas stream comprising a first amount of carbon dioxide by a first sorbent bed in a first adsorbent position;
• generating a first carbon dioxide depleted gas stream by passing the first gas stream through the first sorbent bed and adsorbing a second amount of carbon dioxide from the first gas stream;
• transferring the first carbon dioxide depleted gas stream to a second sorbent bed in a second adsorbent position;
• generating a second carbon dioxide depleted gas stream by passing the first carbon dioxide depleted gas stream through the second sorbent bed and adsorbing a third amount of carbon dioxide from the second carbon dioxide depleted gas stream;
• recovering the second carbon dioxide depleted gas stream from the second sorbent bed;
• receiving a first steam stream by a third sorbent bed in a first desorption position;
• generating a first carbon dioxide enriched steam stream by passing the first steam stream through the third sorbent bed and desorbing a fourth amount of carbon dioxide from the third sorbent bed;
• transferring the first carbon dioxide enriched steam stream to a fourth sorbent bed in a second desorption position;
• generating a second carbon dioxide enriched steam stream by passing the first carbon dioxide enriched steam stream through the fourth sorbent bed and desorbing a fifth amount of carbon dioxide from the fourth sorbent bed;
• and
• capturing the second carbon dioxide enriched steam stream,
• wherein the first sorbent bed, the second sorbent bed, and the third sorbent bed, and the fourth sorbent bed each comprise a metal compound, the metal compound comprising an alkali metal or an alkaline earth metal, and
• wherein the first sorbent bed, the second sorbent bed, and the third sorbent bed, and the fourth sorbent bed maintain a substantially constant temperature and a substantially constant pressure while respectively generating the first carbon dioxide depleted gas stream, generating the second carbon dioxide depleted gas stream, generating the first carbon dioxide enriched steam stream, and generating the second carbon dioxide enriched steam stream.