Continuously moving direct air capture system

Abstract

This invention provides a method for continuously and non-stop recovering carbon dioxide from any number of sources. [Solution] This method utilizes a continuous loop of porous monoliths with an adsorbent supported in their pores to continuously separate carbon dioxide from a gas mixture. A portion of the continuous loop of the monolith is continuously exposed to a flow of a gas mixture containing a small amount of carbon dioxide to adsorb the carbon dioxide from the flow. This loop passes through a sealed regenerative carbon dioxide recovery assembly located adjacent to a portion of the loop, and the monolith can be sealed and housed in this assembly during relative movement. The assembly chamber comprises a plurality of separately sealed zones, including at least one zone for purging oxygen from the monolith, a subsequent zone for heating the monolith to release the adsorbed carbon dioxide, and another cooling zone for cooling the monolith before it re-enters the adsorption portion of the loop exposed to oxygen.

Claims

1. The process of recovering carbon dioxide from a gas via an adsorbent, wherein at least a portion of the gas is ambient air, In the first regeneration zone, the oxygen concentration to which the adsorbent containing the recovered carbon dioxide is exposed is reduced, In the second regeneration zone, the adsorbent is heated to release at least a portion of the recovered carbon dioxide from the adsorbent, In the third regeneration zone, the temperature of the adsorbent is reduced, A method that includes this.

2. The method according to claim 1, further comprising lowering the temperature of the adsorbent and then recovering additional carbon dioxide from the gas using the adsorbent.

3. The method according to claim 1, wherein the adsorbent is moved from the first regeneration zone to the second regeneration zone, and then moved from the second regeneration zone to the third regeneration zone.

4. The method according to claim 1, wherein the oxygen concentration is reduced in the first regeneration zone using a purge gas.

5. The aforementioned purge gas is N ２ (Nitrogen) and CO ２ The method according to claim 4, comprising at least one of (carbon dioxide), steam, and exhaust gas.

6. The method according to claim 4, further comprising removing at least a portion of the purge gas in a fourth regeneration zone.

7. The method according to claim 6, wherein the purge gas is removed by vapor.

8. The method according to claim 1, wherein the adsorbent is heated using steam in the second regeneration zone.

9. The method according to claim 1, further comprising guiding the flow of the gas with a fan or a plurality of fans.

10. The method according to claim 1, wherein the gas is ambient air.

11. The method according to claim 1, wherein the temperature of the adsorbent is reduced using an inert gas in the third regeneration zone.

12. The method according to claim 1, wherein the adsorbent is supported by one or more monoliths.

13. The method according to claim 12, wherein reducing the oxygen concentration in the first regeneration zone includes removing air from the channels and / or pores of one or more monoliths.

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