Two-stage carbon dioxide adsorption using collapsed zeolite with ultra-small pores

A method of separating carbon dioxide (CO2) from a gas stream, the method comprising:

• feeding a gas into a cooler to generate a cooled gas, the cooled gas comprising nitrogen (N2), water (H2O), and CO2;
• feeding the cooled gas to a first H2O adsorption column comprising a first zeolite adsorbent to selectively capture the H2O from the cooled gas, generating first dried cooled gas;
• feeding the first dried cooled gas to a first CO2 adsorption column comprising a second zeolite adsorbent to selectively capture the CO2 from the first dried cooled gas, wherein the second zeolite adsorbent comprises a Linde Type A (LTA) aluminosilicate zeolite that is hydrolyzed and at least partially collapsed;
• and
• switching a flow of the cooled gas to a second H2O adsorption column comprising the first zeolite adsorbent, generating a second dried cooled gas by the second H2O adsorption column.

A system of separating carbon dioxide (CO2) from air, the system comprising:

• a cooler to cool a feed gas;
• an H2O adsorption column to receive the feed gas from the cooler and to discharge a dried gas, the H2O adsorption column comprising a first zeolite adsorbent;
• and
• a CO2 adsorption column to receive the dried gas from the H2O adsorption column and to discharge a tail gas, the CO2 adsorption column comprising a second zeolite adsorbent, the second zeolite adsorbent comprising a Linde Type A (LTA) aluminosilicate zeolite that is hydrolyzed and at least partially collapsed.